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@ -1,4 +1,4 @@
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LAMMPS (15 Feb 2016)
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LAMMPS (6 Oct 2016)
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# FENE beadspring benchmark
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||||
|
||||
units lj
|
||||
@ -43,25 +43,25 @@ Neighbor list info ...
|
||||
master list distance cutoff = 1.52
|
||||
ghost atom cutoff = 1.52
|
||||
binsize = 0.76 -> bins = 45 45 45
|
||||
Memory usage per processor = 11.5189 Mbytes
|
||||
Memory usage per processor = 12.0423 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 0.97029772 0.44484087 20.494523 22.394765 4.6721833
|
||||
100 0.9729966 0.4361122 20.507698 22.40326 4.6548819
|
||||
Loop time of 0.978585 on 1 procs for 100 steps with 32000 atoms
|
||||
Loop time of 0.977647 on 1 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 105948.895 tau/day, 102.188 timesteps/s
|
||||
100.0% CPU use with 1 MPI tasks x no OpenMP threads
|
||||
Performance: 106050.541 tau/day, 102.286 timesteps/s
|
||||
99.9% CPU use with 1 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.19562 | 0.19562 | 0.19562 | 0.0 | 19.99
|
||||
Bond | 0.087475 | 0.087475 | 0.087475 | 0.0 | 8.94
|
||||
Neigh | 0.44861 | 0.44861 | 0.44861 | 0.0 | 45.84
|
||||
Comm | 0.032932 | 0.032932 | 0.032932 | 0.0 | 3.37
|
||||
Output | 0.00010395 | 0.00010395 | 0.00010395 | 0.0 | 0.01
|
||||
Modify | 0.19413 | 0.19413 | 0.19413 | 0.0 | 19.84
|
||||
Other | | 0.01972 | | | 2.02
|
||||
Pair | 0.19421 | 0.19421 | 0.19421 | 0.0 | 19.86
|
||||
Bond | 0.08741 | 0.08741 | 0.08741 | 0.0 | 8.94
|
||||
Neigh | 0.45791 | 0.45791 | 0.45791 | 0.0 | 46.84
|
||||
Comm | 0.032649 | 0.032649 | 0.032649 | 0.0 | 3.34
|
||||
Output | 0.00012207 | 0.00012207 | 0.00012207 | 0.0 | 0.01
|
||||
Modify | 0.18071 | 0.18071 | 0.18071 | 0.0 | 18.48
|
||||
Other | | 0.02464 | | | 2.52
|
||||
|
||||
Nlocal: 32000 ave 32000 max 32000 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# FENE beadspring benchmark
|
||||
|
||||
units lj
|
||||
@ -43,25 +43,25 @@ Neighbor list info ...
|
||||
master list distance cutoff = 1.52
|
||||
ghost atom cutoff = 1.52
|
||||
binsize = 0.76 -> bins = 45 45 45
|
||||
Memory usage per processor = 3.91518 Mbytes
|
||||
Memory usage per processor = 4.14663 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 0.97029772 0.44484087 20.494523 22.394765 4.6721833
|
||||
100 0.97145835 0.43803883 20.502691 22.397872 4.626988
|
||||
Loop time of 0.271187 on 4 procs for 100 steps with 32000 atoms
|
||||
Loop time of 0.269205 on 4 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 382319.453 tau/day, 368.749 timesteps/s
|
||||
99.6% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
Performance: 385133.446 tau/day, 371.464 timesteps/s
|
||||
99.8% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.048621 | 0.050076 | 0.051229 | 0.4 | 18.47
|
||||
Bond | 0.022254 | 0.022942 | 0.023567 | 0.3 | 8.46
|
||||
Neigh | 0.11873 | 0.11881 | 0.11887 | 0.0 | 43.81
|
||||
Comm | 0.019066 | 0.021357 | 0.024297 | 1.3 | 7.88
|
||||
Output | 5.0068e-05 | 5.5015e-05 | 6.1035e-05 | 0.1 | 0.02
|
||||
Modify | 0.048737 | 0.050198 | 0.051231 | 0.4 | 18.51
|
||||
Other | | 0.007751 | | | 2.86
|
||||
Pair | 0.049383 | 0.049756 | 0.049988 | 0.1 | 18.48
|
||||
Bond | 0.022701 | 0.022813 | 0.022872 | 0.0 | 8.47
|
||||
Neigh | 0.11982 | 0.12002 | 0.12018 | 0.0 | 44.58
|
||||
Comm | 0.020274 | 0.021077 | 0.022348 | 0.5 | 7.83
|
||||
Output | 5.3167e-05 | 5.6148e-05 | 6.3181e-05 | 0.1 | 0.02
|
||||
Modify | 0.046276 | 0.046809 | 0.047016 | 0.1 | 17.39
|
||||
Other | | 0.008669 | | | 3.22
|
||||
|
||||
Nlocal: 8000 ave 8030 max 7974 min
|
||||
Histogram: 1 0 0 1 0 1 0 0 0 1
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# FENE beadspring benchmark
|
||||
|
||||
variable x index 1
|
||||
@ -59,25 +59,25 @@ Neighbor list info ...
|
||||
master list distance cutoff = 1.52
|
||||
ghost atom cutoff = 1.52
|
||||
binsize = 0.76 -> bins = 89 89 45
|
||||
Memory usage per processor = 12.8735 Mbytes
|
||||
Memory usage per processor = 13.2993 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 0.97027498 0.44484087 20.494523 22.394765 4.6721833
|
||||
100 0.97682955 0.44239968 20.500229 22.407862 4.6527025
|
||||
Loop time of 1.20889 on 4 procs for 100 steps with 128000 atoms
|
||||
Loop time of 1.14845 on 4 procs for 100 steps with 128000 atoms
|
||||
|
||||
Performance: 85764.410 tau/day, 82.720 timesteps/s
|
||||
99.8% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
Performance: 90277.919 tau/day, 87.074 timesteps/s
|
||||
99.9% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.21738 | 0.23306 | 0.23926 | 1.9 | 19.28
|
||||
Bond | 0.094536 | 0.10196 | 0.10534 | 1.4 | 8.43
|
||||
Neigh | 0.52311 | 0.52392 | 0.52519 | 0.1 | 43.34
|
||||
Comm | 0.090161 | 0.10022 | 0.12557 | 4.7 | 8.29
|
||||
Output | 0.00012207 | 0.00017327 | 0.00019598 | 0.2 | 0.01
|
||||
Modify | 0.19662 | 0.20262 | 0.20672 | 0.8 | 16.76
|
||||
Other | | 0.04694 | | | 3.88
|
||||
Pair | 0.2203 | 0.22207 | 0.22386 | 0.3 | 19.34
|
||||
Bond | 0.094861 | 0.095302 | 0.095988 | 0.1 | 8.30
|
||||
Neigh | 0.52127 | 0.5216 | 0.52189 | 0.0 | 45.42
|
||||
Comm | 0.079585 | 0.082159 | 0.084366 | 0.7 | 7.15
|
||||
Output | 0.00013304 | 0.00015306 | 0.00018501 | 0.2 | 0.01
|
||||
Modify | 0.18351 | 0.18419 | 0.1856 | 0.2 | 16.04
|
||||
Other | | 0.04298 | | | 3.74
|
||||
|
||||
Nlocal: 32000 ave 32015 max 31983 min
|
||||
Histogram: 1 0 1 0 0 0 0 0 1 1
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# LAMMPS benchmark of granular flow
|
||||
# chute flow of 32000 atoms with frozen base at 26 degrees
|
||||
|
||||
@ -47,24 +47,24 @@ Neighbor list info ...
|
||||
master list distance cutoff = 1.1
|
||||
ghost atom cutoff = 1.1
|
||||
binsize = 0.55 -> bins = 73 37 68
|
||||
Memory usage per processor = 15.567 Mbytes
|
||||
Step Atoms KinEng 1 Volume
|
||||
Memory usage per processor = 16.0904 Mbytes
|
||||
Step Atoms KinEng c_1 Volume
|
||||
0 32000 784139.13 1601.1263 29833.783
|
||||
100 32000 784292.08 1571.0968 29834.707
|
||||
Loop time of 0.550482 on 1 procs for 100 steps with 32000 atoms
|
||||
Loop time of 0.534174 on 1 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 1569.534 tau/day, 181.659 timesteps/s
|
||||
100.1% CPU use with 1 MPI tasks x no OpenMP threads
|
||||
Performance: 1617.451 tau/day, 187.205 timesteps/s
|
||||
99.8% CPU use with 1 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.33849 | 0.33849 | 0.33849 | 0.0 | 61.49
|
||||
Neigh | 0.040353 | 0.040353 | 0.040353 | 0.0 | 7.33
|
||||
Comm | 0.018023 | 0.018023 | 0.018023 | 0.0 | 3.27
|
||||
Output | 0.00020385 | 0.00020385 | 0.00020385 | 0.0 | 0.04
|
||||
Modify | 0.13155 | 0.13155 | 0.13155 | 0.0 | 23.90
|
||||
Other | | 0.02186 | | | 3.97
|
||||
Pair | 0.33346 | 0.33346 | 0.33346 | 0.0 | 62.43
|
||||
Neigh | 0.043902 | 0.043902 | 0.043902 | 0.0 | 8.22
|
||||
Comm | 0.018391 | 0.018391 | 0.018391 | 0.0 | 3.44
|
||||
Output | 0.00022411 | 0.00022411 | 0.00022411 | 0.0 | 0.04
|
||||
Modify | 0.11666 | 0.11666 | 0.11666 | 0.0 | 21.84
|
||||
Other | | 0.02153 | | | 4.03
|
||||
|
||||
Nlocal: 32000 ave 32000 max 32000 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# LAMMPS benchmark of granular flow
|
||||
# chute flow of 32000 atoms with frozen base at 26 degrees
|
||||
|
||||
@ -47,24 +47,24 @@ Neighbor list info ...
|
||||
master list distance cutoff = 1.1
|
||||
ghost atom cutoff = 1.1
|
||||
binsize = 0.55 -> bins = 73 37 68
|
||||
Memory usage per processor = 6.81783 Mbytes
|
||||
Step Atoms KinEng 1 Volume
|
||||
Memory usage per processor = 7.04927 Mbytes
|
||||
Step Atoms KinEng c_1 Volume
|
||||
0 32000 784139.13 1601.1263 29833.783
|
||||
100 32000 784292.08 1571.0968 29834.707
|
||||
Loop time of 0.13141 on 4 procs for 100 steps with 32000 atoms
|
||||
Loop time of 0.171815 on 4 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 6574.833 tau/day, 760.976 timesteps/s
|
||||
99.3% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
Performance: 5028.653 tau/day, 582.020 timesteps/s
|
||||
99.7% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.062505 | 0.067 | 0.07152 | 1.5 | 50.99
|
||||
Neigh | 0.010041 | 0.0101 | 0.010178 | 0.1 | 7.69
|
||||
Comm | 0.012347 | 0.012895 | 0.013444 | 0.5 | 9.81
|
||||
Output | 6.3896e-05 | 0.00010294 | 0.00014091 | 0.3 | 0.08
|
||||
Modify | 0.031802 | 0.032348 | 0.032897 | 0.3 | 24.62
|
||||
Other | | 0.008965 | | | 6.82
|
||||
Pair | 0.093691 | 0.096898 | 0.10005 | 0.8 | 56.40
|
||||
Neigh | 0.011976 | 0.012059 | 0.012146 | 0.1 | 7.02
|
||||
Comm | 0.016384 | 0.017418 | 0.018465 | 0.8 | 10.14
|
||||
Output | 7.7963e-05 | 0.00010747 | 0.00013304 | 0.2 | 0.06
|
||||
Modify | 0.031744 | 0.031943 | 0.032167 | 0.1 | 18.59
|
||||
Other | | 0.01339 | | | 7.79
|
||||
|
||||
Nlocal: 8000 ave 8008 max 7992 min
|
||||
Histogram: 2 0 0 0 0 0 0 0 0 2
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# LAMMPS benchmark of granular flow
|
||||
# chute flow of 32000 atoms with frozen base at 26 degrees
|
||||
|
||||
@ -57,24 +57,24 @@ Neighbor list info ...
|
||||
master list distance cutoff = 1.1
|
||||
ghost atom cutoff = 1.1
|
||||
binsize = 0.55 -> bins = 146 73 68
|
||||
Memory usage per processor = 15.7007 Mbytes
|
||||
Step Atoms KinEng 1 Volume
|
||||
Memory usage per processor = 16.1265 Mbytes
|
||||
Step Atoms KinEng c_1 Volume
|
||||
0 128000 3136556.5 6404.5051 119335.13
|
||||
100 128000 3137168.3 6284.3873 119338.83
|
||||
Loop time of 0.906913 on 4 procs for 100 steps with 128000 atoms
|
||||
Loop time of 0.832365 on 4 procs for 100 steps with 128000 atoms
|
||||
|
||||
Performance: 952.683 tau/day, 110.264 timesteps/s
|
||||
99.7% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
Performance: 1038.006 tau/day, 120.140 timesteps/s
|
||||
99.8% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.51454 | 0.53094 | 0.55381 | 2.0 | 58.54
|
||||
Neigh | 0.042597 | 0.043726 | 0.045801 | 0.6 | 4.82
|
||||
Comm | 0.063027 | 0.064657 | 0.067367 | 0.7 | 7.13
|
||||
Output | 0.00024891 | 0.00059718 | 0.00086498 | 1.0 | 0.07
|
||||
Modify | 0.16508 | 0.17656 | 0.1925 | 2.6 | 19.47
|
||||
Other | | 0.09043 | | | 9.97
|
||||
Pair | 0.5178 | 0.52208 | 0.52793 | 0.5 | 62.72
|
||||
Neigh | 0.047003 | 0.047113 | 0.047224 | 0.0 | 5.66
|
||||
Comm | 0.05233 | 0.052988 | 0.053722 | 0.2 | 6.37
|
||||
Output | 0.00024986 | 0.00032717 | 0.00036693 | 0.3 | 0.04
|
||||
Modify | 0.15517 | 0.15627 | 0.15808 | 0.3 | 18.77
|
||||
Other | | 0.0536 | | | 6.44
|
||||
|
||||
Nlocal: 32000 ave 32000 max 32000 min
|
||||
Histogram: 4 0 0 0 0 0 0 0 0 0
|
||||
@ -87,4 +87,4 @@ Total # of neighbors = 460532
|
||||
Ave neighs/atom = 3.59791
|
||||
Neighbor list builds = 2
|
||||
Dangerous builds = 0
|
||||
Total wall time: 0:00:01
|
||||
Total wall time: 0:00:00
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# bulk Cu lattice
|
||||
|
||||
variable x index 1
|
||||
@ -49,25 +49,25 @@ Neighbor list info ...
|
||||
master list distance cutoff = 5.95
|
||||
ghost atom cutoff = 5.95
|
||||
binsize = 2.975 -> bins = 25 25 25
|
||||
Memory usage per processor = 10.2238 Mbytes
|
||||
Memory usage per processor = 11.2238 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 1600 -113280 0 -106662.09 18703.573
|
||||
50 781.69049 -109873.35 0 -106640.13 52273.088
|
||||
100 801.832 -109957.3 0 -106640.77 51322.821
|
||||
Loop time of 5.90097 on 1 procs for 100 steps with 32000 atoms
|
||||
Loop time of 5.96529 on 1 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 7.321 ns/day, 3.278 hours/ns, 16.946 timesteps/s
|
||||
Performance: 7.242 ns/day, 3.314 hours/ns, 16.764 timesteps/s
|
||||
99.9% CPU use with 1 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 5.2121 | 5.2121 | 5.2121 | 0.0 | 88.33
|
||||
Neigh | 0.58212 | 0.58212 | 0.58212 | 0.0 | 9.86
|
||||
Comm | 0.030392 | 0.030392 | 0.030392 | 0.0 | 0.52
|
||||
Output | 0.00023389 | 0.00023389 | 0.00023389 | 0.0 | 0.00
|
||||
Modify | 0.060871 | 0.060871 | 0.060871 | 0.0 | 1.03
|
||||
Other | | 0.01527 | | | 0.26
|
||||
Pair | 5.2743 | 5.2743 | 5.2743 | 0.0 | 88.42
|
||||
Neigh | 0.59212 | 0.59212 | 0.59212 | 0.0 | 9.93
|
||||
Comm | 0.030399 | 0.030399 | 0.030399 | 0.0 | 0.51
|
||||
Output | 0.00026202 | 0.00026202 | 0.00026202 | 0.0 | 0.00
|
||||
Modify | 0.050487 | 0.050487 | 0.050487 | 0.0 | 0.85
|
||||
Other | | 0.01776 | | | 0.30
|
||||
|
||||
Nlocal: 32000 ave 32000 max 32000 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# bulk Cu lattice
|
||||
|
||||
variable x index 1
|
||||
@ -49,25 +49,25 @@ Neighbor list info ...
|
||||
master list distance cutoff = 5.95
|
||||
ghost atom cutoff = 5.95
|
||||
binsize = 2.975 -> bins = 25 25 25
|
||||
Memory usage per processor = 5.09629 Mbytes
|
||||
Memory usage per processor = 5.59629 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 1600 -113280 0 -106662.09 18703.573
|
||||
50 781.69049 -109873.35 0 -106640.13 52273.088
|
||||
100 801.832 -109957.3 0 -106640.77 51322.821
|
||||
Loop time of 1.58019 on 4 procs for 100 steps with 32000 atoms
|
||||
Loop time of 1.64562 on 4 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 27.338 ns/day, 0.878 hours/ns, 63.284 timesteps/s
|
||||
Performance: 26.252 ns/day, 0.914 hours/ns, 60.767 timesteps/s
|
||||
99.8% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 1.3617 | 1.366 | 1.3723 | 0.4 | 86.45
|
||||
Neigh | 0.15123 | 0.15232 | 0.15374 | 0.2 | 9.64
|
||||
Comm | 0.033429 | 0.041275 | 0.047066 | 2.7 | 2.61
|
||||
Output | 0.00011301 | 0.0001573 | 0.000211 | 0.3 | 0.01
|
||||
Modify | 0.014694 | 0.015085 | 0.015421 | 0.2 | 0.95
|
||||
Other | | 0.005342 | | | 0.34
|
||||
Pair | 1.408 | 1.4175 | 1.4341 | 0.9 | 86.14
|
||||
Neigh | 0.15512 | 0.15722 | 0.16112 | 0.6 | 9.55
|
||||
Comm | 0.029105 | 0.049986 | 0.061822 | 5.8 | 3.04
|
||||
Output | 0.00010991 | 0.00011539 | 0.00012302 | 0.0 | 0.01
|
||||
Modify | 0.013383 | 0.013573 | 0.013883 | 0.2 | 0.82
|
||||
Other | | 0.007264 | | | 0.44
|
||||
|
||||
Nlocal: 8000 ave 8008 max 7993 min
|
||||
Histogram: 2 0 0 0 0 0 0 0 1 1
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# bulk Cu lattice
|
||||
|
||||
variable x index 1
|
||||
@ -49,25 +49,25 @@ Neighbor list info ...
|
||||
master list distance cutoff = 5.95
|
||||
ghost atom cutoff = 5.95
|
||||
binsize = 2.975 -> bins = 49 49 25
|
||||
Memory usage per processor = 10.1402 Mbytes
|
||||
Memory usage per processor = 11.1402 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 1600 -453120 0 -426647.73 18704.012
|
||||
50 779.50001 -439457.02 0 -426560.06 52355.276
|
||||
100 797.97828 -439764.76 0 -426562.07 51474.74
|
||||
Loop time of 6.46849 on 4 procs for 100 steps with 128000 atoms
|
||||
Loop time of 6.60121 on 4 procs for 100 steps with 128000 atoms
|
||||
|
||||
Performance: 6.679 ns/day, 3.594 hours/ns, 15.460 timesteps/s
|
||||
Performance: 6.544 ns/day, 3.667 hours/ns, 15.149 timesteps/s
|
||||
99.9% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 5.581 | 5.5997 | 5.6265 | 0.8 | 86.57
|
||||
Neigh | 0.65287 | 0.658 | 0.66374 | 0.5 | 10.17
|
||||
Comm | 0.075706 | 0.11015 | 0.13655 | 7.2 | 1.70
|
||||
Output | 0.00026488 | 0.00028312 | 0.00029302 | 0.1 | 0.00
|
||||
Modify | 0.069607 | 0.072407 | 0.074555 | 0.7 | 1.12
|
||||
Other | | 0.02794 | | | 0.43
|
||||
Pair | 5.6676 | 5.7011 | 5.7469 | 1.3 | 86.36
|
||||
Neigh | 0.66423 | 0.67119 | 0.68082 | 0.7 | 10.17
|
||||
Comm | 0.079367 | 0.13668 | 0.1791 | 10.5 | 2.07
|
||||
Output | 0.00026989 | 0.00028622 | 0.00031209 | 0.1 | 0.00
|
||||
Modify | 0.060046 | 0.062203 | 0.065009 | 0.9 | 0.94
|
||||
Other | | 0.02974 | | | 0.45
|
||||
|
||||
Nlocal: 32000 ave 32092 max 31914 min
|
||||
Histogram: 1 0 0 1 0 1 0 0 0 1
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# 3d Lennard-Jones melt
|
||||
|
||||
variable x index 1
|
||||
@ -50,20 +50,20 @@ Memory usage per processor = 8.21387 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 1.44 -6.7733681 0 -4.6134356 -5.0197073
|
||||
100 0.7574531 -5.7585055 0 -4.6223613 0.20726105
|
||||
Loop time of 2.26309 on 1 procs for 100 steps with 32000 atoms
|
||||
Loop time of 2.26185 on 1 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 19088.920 tau/day, 44.187 timesteps/s
|
||||
Performance: 19099.377 tau/day, 44.212 timesteps/s
|
||||
99.9% CPU use with 1 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 1.9341 | 1.9341 | 1.9341 | 0.0 | 85.46
|
||||
Neigh | 0.2442 | 0.2442 | 0.2442 | 0.0 | 10.79
|
||||
Comm | 0.024158 | 0.024158 | 0.024158 | 0.0 | 1.07
|
||||
Output | 0.00011611 | 0.00011611 | 0.00011611 | 0.0 | 0.01
|
||||
Modify | 0.053222 | 0.053222 | 0.053222 | 0.0 | 2.35
|
||||
Other | | 0.007258 | | | 0.32
|
||||
Pair | 1.9328 | 1.9328 | 1.9328 | 0.0 | 85.45
|
||||
Neigh | 0.2558 | 0.2558 | 0.2558 | 0.0 | 11.31
|
||||
Comm | 0.024061 | 0.024061 | 0.024061 | 0.0 | 1.06
|
||||
Output | 0.00012612 | 0.00012612 | 0.00012612 | 0.0 | 0.01
|
||||
Modify | 0.040887 | 0.040887 | 0.040887 | 0.0 | 1.81
|
||||
Other | | 0.008214 | | | 0.36
|
||||
|
||||
Nlocal: 32000 ave 32000 max 32000 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# 3d Lennard-Jones melt
|
||||
|
||||
variable x index 1
|
||||
@ -50,20 +50,20 @@ Memory usage per processor = 4.09506 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 1.44 -6.7733681 0 -4.6134356 -5.0197073
|
||||
100 0.7574531 -5.7585055 0 -4.6223613 0.20726105
|
||||
Loop time of 0.640733 on 4 procs for 100 steps with 32000 atoms
|
||||
Loop time of 0.635957 on 4 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 67422.779 tau/day, 156.071 timesteps/s
|
||||
99.7% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
Performance: 67929.172 tau/day, 157.243 timesteps/s
|
||||
99.9% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 0.49487 | 0.51733 | 0.5322 | 1.9 | 80.74
|
||||
Neigh | 0.061131 | 0.063685 | 0.065433 | 0.6 | 9.94
|
||||
Comm | 0.02457 | 0.042349 | 0.069598 | 8.1 | 6.61
|
||||
Output | 5.9843e-05 | 6.3181e-05 | 6.6996e-05 | 0.0 | 0.01
|
||||
Modify | 0.012961 | 0.013863 | 0.014491 | 0.5 | 2.16
|
||||
Other | | 0.003448 | | | 0.54
|
||||
Pair | 0.51335 | 0.51822 | 0.52569 | 0.7 | 81.49
|
||||
Neigh | 0.063695 | 0.064309 | 0.065397 | 0.3 | 10.11
|
||||
Comm | 0.027525 | 0.03629 | 0.041959 | 3.1 | 5.71
|
||||
Output | 6.3896e-05 | 6.6698e-05 | 7.081e-05 | 0.0 | 0.01
|
||||
Modify | 0.012472 | 0.01254 | 0.012618 | 0.1 | 1.97
|
||||
Other | | 0.004529 | | | 0.71
|
||||
|
||||
Nlocal: 8000 ave 8037 max 7964 min
|
||||
Histogram: 2 0 0 0 0 0 0 0 1 1
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# 3d Lennard-Jones melt
|
||||
|
||||
variable x index 1
|
||||
@ -50,20 +50,20 @@ Memory usage per processor = 8.13678 Mbytes
|
||||
Step Temp E_pair E_mol TotEng Press
|
||||
0 1.44 -6.7733681 0 -4.6133849 -5.0196788
|
||||
100 0.75841891 -5.759957 0 -4.6223375 0.20008866
|
||||
Loop time of 2.57914 on 4 procs for 100 steps with 128000 atoms
|
||||
Loop time of 2.55762 on 4 procs for 100 steps with 128000 atoms
|
||||
|
||||
Performance: 16749.768 tau/day, 38.773 timesteps/s
|
||||
Performance: 16890.677 tau/day, 39.099 timesteps/s
|
||||
99.8% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 2.042 | 2.1092 | 2.1668 | 3.1 | 81.78
|
||||
Neigh | 0.23982 | 0.24551 | 0.25233 | 1.0 | 9.52
|
||||
Comm | 0.067088 | 0.13887 | 0.22681 | 15.7 | 5.38
|
||||
Output | 0.00013185 | 0.00021666 | 0.00027108 | 0.4 | 0.01
|
||||
Modify | 0.060348 | 0.071269 | 0.077063 | 2.5 | 2.76
|
||||
Other | | 0.01403 | | | 0.54
|
||||
Pair | 2.0583 | 2.0988 | 2.1594 | 2.6 | 82.06
|
||||
Neigh | 0.24411 | 0.24838 | 0.25585 | 0.9 | 9.71
|
||||
Comm | 0.066397 | 0.13872 | 0.1863 | 11.9 | 5.42
|
||||
Output | 0.00012994 | 0.00021023 | 0.00025702 | 0.3 | 0.01
|
||||
Modify | 0.055533 | 0.058343 | 0.061791 | 1.2 | 2.28
|
||||
Other | | 0.0132 | | | 0.52
|
||||
|
||||
Nlocal: 32000 ave 32060 max 31939 min
|
||||
Histogram: 1 0 1 0 0 0 0 1 0 1
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# Rhodopsin model
|
||||
|
||||
units real
|
||||
@ -56,6 +56,7 @@ timestep 2.0
|
||||
|
||||
run 100
|
||||
PPPM initialization ...
|
||||
WARNING: Using 12-bit tables for long-range coulomb (../kspace.cpp:316)
|
||||
G vector (1/distance) = 0.248835
|
||||
grid = 25 32 32
|
||||
stencil order = 5
|
||||
@ -70,41 +71,41 @@ Neighbor list info ...
|
||||
master list distance cutoff = 12
|
||||
ghost atom cutoff = 12
|
||||
binsize = 6 -> bins = 10 13 13
|
||||
Memory usage per processor = 91.7487 Mbytes
|
||||
Memory usage per processor = 93.2721 Mbytes
|
||||
---------------- Step 0 ----- CPU = 0.0000 (sec) ----------------
|
||||
TotEng = -25356.2064 KinEng = 21444.8313 Temp = 299.0397
|
||||
PotEng = -46801.0377 E_bond = 2537.9940 E_angle = 10921.3742
|
||||
E_dihed = 5211.7865 E_impro = 213.5116 E_vdwl = -2307.8634
|
||||
E_coul = 207025.8927 E_long = -270403.7333 Press = -142.6035
|
||||
E_coul = 207025.8927 E_long = -270403.7333 Press = -149.3301
|
||||
Volume = 307995.0335
|
||||
---------------- Step 50 ----- CPU = 17.6362 (sec) ----------------
|
||||
TotEng = -25330.0828 KinEng = 21501.0029 Temp = 299.8230
|
||||
PotEng = -46831.0857 E_bond = 2471.7004 E_angle = 10836.4975
|
||||
E_dihed = 5239.6299 E_impro = 227.1218 E_vdwl = -1993.2754
|
||||
E_coul = 206797.6331 E_long = -270410.3930 Press = 237.6701
|
||||
Volume = 308031.5639
|
||||
---------------- Step 100 ----- CPU = 35.9089 (sec) ----------------
|
||||
TotEng = -25290.7593 KinEng = 21592.0117 Temp = 301.0920
|
||||
PotEng = -46882.7709 E_bond = 2567.9807 E_angle = 10781.9408
|
||||
E_dihed = 5198.7432 E_impro = 216.7834 E_vdwl = -1902.4783
|
||||
E_coul = 206659.2326 E_long = -270404.9733 Press = 6.9960
|
||||
Volume = 308133.9888
|
||||
Loop time of 35.9089 on 1 procs for 100 steps with 32000 atoms
|
||||
---------------- Step 50 ----- CPU = 17.2007 (sec) ----------------
|
||||
TotEng = -25330.0321 KinEng = 21501.0036 Temp = 299.8230
|
||||
PotEng = -46831.0357 E_bond = 2471.7033 E_angle = 10836.5108
|
||||
E_dihed = 5239.6316 E_impro = 227.1219 E_vdwl = -1993.2763
|
||||
E_coul = 206797.6655 E_long = -270410.3927 Press = 237.6866
|
||||
Volume = 308031.5640
|
||||
---------------- Step 100 ----- CPU = 35.0315 (sec) ----------------
|
||||
TotEng = -25290.7387 KinEng = 21591.9096 Temp = 301.0906
|
||||
PotEng = -46882.6484 E_bond = 2567.9789 E_angle = 10781.9556
|
||||
E_dihed = 5198.7493 E_impro = 216.7863 E_vdwl = -1902.6458
|
||||
E_coul = 206659.5006 E_long = -270404.9733 Press = 6.7898
|
||||
Volume = 308133.9933
|
||||
Loop time of 35.0316 on 1 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 0.481 ns/day, 49.874 hours/ns, 2.785 timesteps/s
|
||||
Performance: 0.493 ns/day, 48.655 hours/ns, 2.855 timesteps/s
|
||||
99.9% CPU use with 1 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 25.731 | 25.731 | 25.731 | 0.0 | 71.66
|
||||
Bond | 1.2771 | 1.2771 | 1.2771 | 0.0 | 3.56
|
||||
Kspace | 3.2094 | 3.2094 | 3.2094 | 0.0 | 8.94
|
||||
Neigh | 4.4538 | 4.4538 | 4.4538 | 0.0 | 12.40
|
||||
Comm | 0.068507 | 0.068507 | 0.068507 | 0.0 | 0.19
|
||||
Output | 0.00025916 | 0.00025916 | 0.00025916 | 0.0 | 0.00
|
||||
Modify | 1.1417 | 1.1417 | 1.1417 | 0.0 | 3.18
|
||||
Other | | 0.027 | | | 0.08
|
||||
Pair | 25.021 | 25.021 | 25.021 | 0.0 | 71.42
|
||||
Bond | 1.2834 | 1.2834 | 1.2834 | 0.0 | 3.66
|
||||
Kspace | 3.2116 | 3.2116 | 3.2116 | 0.0 | 9.17
|
||||
Neigh | 4.2767 | 4.2767 | 4.2767 | 0.0 | 12.21
|
||||
Comm | 0.069283 | 0.069283 | 0.069283 | 0.0 | 0.20
|
||||
Output | 0.00028205 | 0.00028205 | 0.00028205 | 0.0 | 0.00
|
||||
Modify | 1.14 | 1.14 | 1.14 | 0.0 | 3.25
|
||||
Other | | 0.02938 | | | 0.08
|
||||
|
||||
Nlocal: 32000 ave 32000 max 32000 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
@ -113,9 +114,9 @@ Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
Neighs: 1.20281e+07 ave 1.20281e+07 max 1.20281e+07 min
|
||||
Histogram: 1 0 0 0 0 0 0 0 0 0
|
||||
|
||||
Total # of neighbors = 12028107
|
||||
Total # of neighbors = 12028098
|
||||
Ave neighs/atom = 375.878
|
||||
Ave special neighs/atom = 7.43187
|
||||
Neighbor list builds = 11
|
||||
Dangerous builds = 0
|
||||
Total wall time: 0:00:37
|
||||
Total wall time: 0:00:36
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# Rhodopsin model
|
||||
|
||||
units real
|
||||
@ -56,6 +56,7 @@ timestep 2.0
|
||||
|
||||
run 100
|
||||
PPPM initialization ...
|
||||
WARNING: Using 12-bit tables for long-range coulomb (../kspace.cpp:316)
|
||||
G vector (1/distance) = 0.248835
|
||||
grid = 25 32 32
|
||||
stencil order = 5
|
||||
@ -70,52 +71,52 @@ Neighbor list info ...
|
||||
master list distance cutoff = 12
|
||||
ghost atom cutoff = 12
|
||||
binsize = 6 -> bins = 10 13 13
|
||||
Memory usage per processor = 36.629 Mbytes
|
||||
Memory usage per processor = 37.3604 Mbytes
|
||||
---------------- Step 0 ----- CPU = 0.0000 (sec) ----------------
|
||||
TotEng = -25356.2064 KinEng = 21444.8313 Temp = 299.0397
|
||||
PotEng = -46801.0377 E_bond = 2537.9940 E_angle = 10921.3742
|
||||
E_dihed = 5211.7865 E_impro = 213.5116 E_vdwl = -2307.8634
|
||||
E_coul = 207025.8927 E_long = -270403.7333 Press = -142.6035
|
||||
E_coul = 207025.8927 E_long = -270403.7333 Press = -149.3301
|
||||
Volume = 307995.0335
|
||||
---------------- Step 50 ----- CPU = 4.7461 (sec) ----------------
|
||||
TotEng = -25330.0828 KinEng = 21501.0029 Temp = 299.8230
|
||||
PotEng = -46831.0857 E_bond = 2471.7004 E_angle = 10836.4975
|
||||
E_dihed = 5239.6299 E_impro = 227.1218 E_vdwl = -1993.2754
|
||||
E_coul = 206797.6331 E_long = -270410.3930 Press = 237.6701
|
||||
Volume = 308031.5639
|
||||
---------------- Step 100 ----- CPU = 9.6332 (sec) ----------------
|
||||
TotEng = -25290.7591 KinEng = 21592.0117 Temp = 301.0920
|
||||
PotEng = -46882.7708 E_bond = 2567.9807 E_angle = 10781.9408
|
||||
E_dihed = 5198.7432 E_impro = 216.7834 E_vdwl = -1902.4783
|
||||
E_coul = 206659.2327 E_long = -270404.9733 Press = 6.9960
|
||||
Volume = 308133.9888
|
||||
Loop time of 9.63322 on 4 procs for 100 steps with 32000 atoms
|
||||
---------------- Step 50 ----- CPU = 4.6056 (sec) ----------------
|
||||
TotEng = -25330.0321 KinEng = 21501.0036 Temp = 299.8230
|
||||
PotEng = -46831.0357 E_bond = 2471.7033 E_angle = 10836.5108
|
||||
E_dihed = 5239.6316 E_impro = 227.1219 E_vdwl = -1993.2763
|
||||
E_coul = 206797.6655 E_long = -270410.3927 Press = 237.6866
|
||||
Volume = 308031.5640
|
||||
---------------- Step 100 ----- CPU = 9.3910 (sec) ----------------
|
||||
TotEng = -25290.7386 KinEng = 21591.9096 Temp = 301.0906
|
||||
PotEng = -46882.6482 E_bond = 2567.9789 E_angle = 10781.9556
|
||||
E_dihed = 5198.7493 E_impro = 216.7863 E_vdwl = -1902.6458
|
||||
E_coul = 206659.5007 E_long = -270404.9733 Press = 6.7898
|
||||
Volume = 308133.9933
|
||||
Loop time of 9.39107 on 4 procs for 100 steps with 32000 atoms
|
||||
|
||||
Performance: 1.794 ns/day, 13.379 hours/ns, 10.381 timesteps/s
|
||||
99.9% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
Performance: 1.840 ns/day, 13.043 hours/ns, 10.648 timesteps/s
|
||||
99.8% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 6.4364 | 6.5993 | 6.7208 | 4.7 | 68.51
|
||||
Bond | 0.30755 | 0.32435 | 0.35704 | 3.4 | 3.37
|
||||
Kspace | 0.92248 | 1.0782 | 1.2597 | 13.0 | 11.19
|
||||
Neigh | 1.1669 | 1.1672 | 1.1675 | 0.0 | 12.12
|
||||
Comm | 0.094674 | 0.098065 | 0.10543 | 1.4 | 1.02
|
||||
Output | 0.00015521 | 0.00016224 | 0.00018215 | 0.1 | 0.00
|
||||
Modify | 0.32982 | 0.34654 | 0.35365 | 1.6 | 3.60
|
||||
Other | | 0.01943 | | | 0.20
|
||||
Pair | 6.2189 | 6.3266 | 6.6072 | 6.5 | 67.37
|
||||
Bond | 0.30793 | 0.32122 | 0.3414 | 2.4 | 3.42
|
||||
Kspace | 0.87994 | 1.1644 | 1.2855 | 15.3 | 12.40
|
||||
Neigh | 1.1358 | 1.136 | 1.1362 | 0.0 | 12.10
|
||||
Comm | 0.08292 | 0.084935 | 0.087077 | 0.5 | 0.90
|
||||
Output | 0.00015712 | 0.00016558 | 0.00018501 | 0.1 | 0.00
|
||||
Modify | 0.33717 | 0.34246 | 0.34794 | 0.7 | 3.65
|
||||
Other | | 0.01526 | | | 0.16
|
||||
|
||||
Nlocal: 8000 ave 8143 max 7933 min
|
||||
Histogram: 1 2 0 0 0 0 0 0 0 1
|
||||
Nghost: 22733.5 ave 22769 max 22693 min
|
||||
Histogram: 1 0 0 0 0 2 0 0 0 1
|
||||
Neighs: 3.00703e+06 ave 3.0975e+06 max 2.96493e+06 min
|
||||
Neighs: 3.00702e+06 ave 3.0975e+06 max 2.96492e+06 min
|
||||
Histogram: 1 2 0 0 0 0 0 0 0 1
|
||||
|
||||
Total # of neighbors = 12028107
|
||||
Total # of neighbors = 12028098
|
||||
Ave neighs/atom = 375.878
|
||||
Ave special neighs/atom = 7.43187
|
||||
Neighbor list builds = 11
|
||||
Dangerous builds = 0
|
||||
Total wall time: 0:00:10
|
||||
Total wall time: 0:00:09
|
||||
@ -1,4 +1,4 @@
|
||||
LAMMPS (15 Feb 2016)
|
||||
LAMMPS (6 Oct 2016)
|
||||
# Rhodopsin model
|
||||
|
||||
variable x index 1
|
||||
@ -77,6 +77,7 @@ timestep 2.0
|
||||
|
||||
run 100
|
||||
PPPM initialization ...
|
||||
WARNING: Using 12-bit tables for long-range coulomb (../kspace.cpp:316)
|
||||
G vector (1/distance) = 0.248593
|
||||
grid = 48 60 36
|
||||
stencil order = 5
|
||||
@ -91,52 +92,52 @@ Neighbor list info ...
|
||||
master list distance cutoff = 12
|
||||
ghost atom cutoff = 12
|
||||
binsize = 6 -> bins = 19 26 13
|
||||
Memory usage per processor = 95.5339 Mbytes
|
||||
Memory usage per processor = 96.9597 Mbytes
|
||||
---------------- Step 0 ----- CPU = 0.0000 (sec) ----------------
|
||||
TotEng = -101425.4887 KinEng = 85779.3251 Temp = 299.0304
|
||||
PotEng = -187204.8138 E_bond = 10151.9760 E_angle = 43685.4968
|
||||
E_dihed = 20847.1460 E_impro = 854.0463 E_vdwl = -9231.4537
|
||||
E_coul = 827053.5824 E_long = -1080565.6077 Press = -142.3092
|
||||
E_coul = 827053.5824 E_long = -1080565.6077 Press = -149.0358
|
||||
Volume = 1231980.1340
|
||||
---------------- Step 50 ----- CPU = 18.7806 (sec) ----------------
|
||||
TotEng = -101320.2677 KinEng = 86003.4837 Temp = 299.8118
|
||||
PotEng = -187323.7514 E_bond = 9887.1072 E_angle = 43346.7922
|
||||
E_dihed = 20958.7032 E_impro = 908.4715 E_vdwl = -7973.4457
|
||||
E_coul = 826141.3831 E_long = -1080592.7629 Press = 238.0161
|
||||
Volume = 1232126.1855
|
||||
---------------- Step 100 ----- CPU = 38.3684 (sec) ----------------
|
||||
TotEng = -101158.1849 KinEng = 86355.6149 Temp = 301.0393
|
||||
PotEng = -187513.7998 E_bond = 10272.0693 E_angle = 43128.6454
|
||||
E_dihed = 20793.9759 E_impro = 867.0826 E_vdwl = -7586.7186
|
||||
E_coul = 825583.7122 E_long = -1080572.5667 Press = 15.2151
|
||||
Volume = 1232535.8423
|
||||
Loop time of 38.3684 on 4 procs for 100 steps with 128000 atoms
|
||||
---------------- Step 50 ----- CPU = 18.1689 (sec) ----------------
|
||||
TotEng = -101320.0211 KinEng = 86003.4933 Temp = 299.8118
|
||||
PotEng = -187323.5144 E_bond = 9887.1189 E_angle = 43346.8448
|
||||
E_dihed = 20958.7108 E_impro = 908.4721 E_vdwl = -7973.4486
|
||||
E_coul = 826141.5493 E_long = -1080592.7617 Press = 238.0404
|
||||
Volume = 1232126.1814
|
||||
---------------- Step 100 ----- CPU = 37.2027 (sec) ----------------
|
||||
TotEng = -101157.9546 KinEng = 86355.7413 Temp = 301.0398
|
||||
PotEng = -187513.6959 E_bond = 10272.0456 E_angle = 43128.7018
|
||||
E_dihed = 20794.0107 E_impro = 867.0928 E_vdwl = -7587.2409
|
||||
E_coul = 825584.2416 E_long = -1080572.5474 Press = 15.1729
|
||||
Volume = 1232535.8440
|
||||
Loop time of 37.2028 on 4 procs for 100 steps with 128000 atoms
|
||||
|
||||
Performance: 0.450 ns/day, 53.289 hours/ns, 2.606 timesteps/s
|
||||
Performance: 0.464 ns/day, 51.671 hours/ns, 2.688 timesteps/s
|
||||
99.9% CPU use with 4 MPI tasks x no OpenMP threads
|
||||
|
||||
MPI task timing breakdown:
|
||||
Section | min time | avg time | max time |%varavg| %total
|
||||
---------------------------------------------------------------
|
||||
Pair | 26.205 | 26.538 | 26.911 | 5.0 | 69.17
|
||||
Bond | 1.298 | 1.3125 | 1.3277 | 1.0 | 3.42
|
||||
Kspace | 3.7099 | 4.0992 | 4.4422 | 13.3 | 10.68
|
||||
Neigh | 4.6137 | 4.6144 | 4.615 | 0.0 | 12.03
|
||||
Comm | 0.21398 | 0.21992 | 0.22886 | 1.2 | 0.57
|
||||
Output | 0.00030518 | 0.00031543 | 0.00033307 | 0.1 | 0.00
|
||||
Modify | 1.5066 | 1.5232 | 1.5388 | 1.0 | 3.97
|
||||
Other | | 0.06051 | | | 0.16
|
||||
Pair | 25.431 | 25.738 | 25.984 | 4.0 | 69.18
|
||||
Bond | 1.2966 | 1.3131 | 1.3226 | 0.9 | 3.53
|
||||
Kspace | 3.7563 | 4.0123 | 4.3127 | 10.0 | 10.79
|
||||
Neigh | 4.3778 | 4.378 | 4.3782 | 0.0 | 11.77
|
||||
Comm | 0.1903 | 0.19549 | 0.20485 | 1.3 | 0.53
|
||||
Output | 0.00031805 | 0.00037521 | 0.00039601 | 0.2 | 0.00
|
||||
Modify | 1.4861 | 1.5051 | 1.5122 | 0.9 | 4.05
|
||||
Other | | 0.05992 | | | 0.16
|
||||
|
||||
Nlocal: 32000 ave 32000 max 32000 min
|
||||
Histogram: 4 0 0 0 0 0 0 0 0 0
|
||||
Nghost: 47957 ave 47957 max 47957 min
|
||||
Histogram: 4 0 0 0 0 0 0 0 0 0
|
||||
Neighs: 1.20281e+07 ave 1.20572e+07 max 1.1999e+07 min
|
||||
Neighs: 1.20281e+07 ave 1.20572e+07 max 1.19991e+07 min
|
||||
Histogram: 2 0 0 0 0 0 0 0 0 2
|
||||
|
||||
Total # of neighbors = 48112472
|
||||
Total # of neighbors = 48112540
|
||||
Ave neighs/atom = 375.879
|
||||
Ave special neighs/atom = 7.43187
|
||||
Neighbor list builds = 11
|
||||
Dangerous builds = 0
|
||||
Total wall time: 0:00:39
|
||||
Total wall time: 0:00:38
|
||||
6
doc/.gitignore
vendored
@ -1 +1,5 @@
|
||||
|
||||
/html
|
||||
/LAMMPS.epub
|
||||
/LAMMPS.mobi
|
||||
/Manual.pdf
|
||||
/Developer.pdf
|
||||
|
||||
31
doc/Makefile
@ -8,19 +8,21 @@ VENV = $(BUILDDIR)/docenv
|
||||
TXT2RST = $(VENV)/bin/txt2rst
|
||||
|
||||
PYTHON = $(shell which python3)
|
||||
HAS_PYTHON3 = NO
|
||||
HAS_VIRTUALENV = NO
|
||||
|
||||
ifeq ($(shell which python3 >/dev/null 2>&1; echo $$?), 1)
|
||||
$(error Python3 was not found! Please check README.md for further instructions)
|
||||
ifeq ($(shell which python3 >/dev/null 2>&1; echo $$?), 0)
|
||||
HAS_PYTHON3 = YES
|
||||
endif
|
||||
|
||||
ifeq ($(shell which virtualenv >/dev/null 2>&1; echo $$?), 1)
|
||||
$(error virtualenv was not found! Please check README.md for further instructions)
|
||||
ifeq ($(shell which virtualenv >/dev/null 2>&1; echo $$?), 0)
|
||||
HAS_VIRTUALENV = YES
|
||||
endif
|
||||
|
||||
SOURCES=$(wildcard src/*.txt)
|
||||
OBJECTS=$(SOURCES:src/%.txt=$(RSTDIR)/%.rst)
|
||||
|
||||
.PHONY: help clean-all clean html pdf old venv
|
||||
.PHONY: help clean-all clean epub html pdf old venv
|
||||
|
||||
# ------------------------------------------
|
||||
|
||||
@ -30,6 +32,7 @@ help:
|
||||
@echo " pdf create Manual.pdf and Developer.pdf in this dir"
|
||||
@echo " old create old-style HTML doc pages in old dir"
|
||||
@echo " fetch fetch HTML and PDF files from LAMMPS web site"
|
||||
@echo " epub create ePUB format manual for e-book readers"
|
||||
@echo " clean remove all intermediate RST files"
|
||||
@echo " clean-all reset the entire build environment"
|
||||
@echo " txt2html build txt2html tool"
|
||||
@ -40,7 +43,7 @@ clean-all:
|
||||
rm -rf $(BUILDDIR)/* utils/txt2html/txt2html.exe
|
||||
|
||||
clean:
|
||||
rm -rf $(RSTDIR)
|
||||
rm -rf $(RSTDIR) html
|
||||
|
||||
html: $(OBJECTS)
|
||||
@(\
|
||||
@ -61,6 +64,20 @@ html: $(OBJECTS)
|
||||
@rm -rf html/USER/*/*.[sg]*
|
||||
@echo "Build finished. The HTML pages are in doc/html."
|
||||
|
||||
epub: $(OBJECTS)
|
||||
@mkdir -p epub
|
||||
@rm -f LAMMPS.epub
|
||||
@cp src/JPG/lammps-logo.png epub/
|
||||
@(\
|
||||
. $(VENV)/bin/activate ;\
|
||||
cp -r src/* $(RSTDIR)/ ;\
|
||||
sphinx-build -j 8 -b epub -c utils/sphinx-config -d $(BUILDDIR)/doctrees $(RSTDIR) epub ;\
|
||||
deactivate ;\
|
||||
)
|
||||
@mv epub/LAMMPS.epub .
|
||||
@rm -rf epub
|
||||
@echo "Build finished. The ePUB manual file is created."
|
||||
|
||||
pdf: utils/txt2html/txt2html.exe
|
||||
@(\
|
||||
cd src; \
|
||||
@ -109,6 +126,8 @@ $(RSTDIR)/%.rst : src/%.txt $(TXT2RST)
|
||||
)
|
||||
|
||||
$(VENV):
|
||||
@if [ "$(HAS_PYTHON3)" == "NO" ] ; then echo "Python3 was not found! Please check README.md for further instructions" 1>&2; exit 1; fi
|
||||
@if [ "$(HAS_VIRTUALENV)" == "NO" ] ; then echo "virtualenv was not found! Please check README.md for further instructions" 1>&2; exit 1; fi
|
||||
@( \
|
||||
virtualenv -p $(PYTHON) $(VENV); \
|
||||
. $(VENV)/bin/activate; \
|
||||
|
||||
68
doc/README
@ -1,10 +1,47 @@
|
||||
Generation of LAMMPS Documentation
|
||||
LAMMPS Documentation
|
||||
|
||||
Depending on how you obtained LAMMPS, this directory has 2 or 3
|
||||
sub-directories and optionally 2 PDF files and an ePUB file:
|
||||
|
||||
src content files for LAMMPS documentation
|
||||
html HTML version of the LAMMPS manual (see html/Manual.html)
|
||||
tools tools and settings for building the documentation
|
||||
Manual.pdf large PDF version of entire manual
|
||||
Developer.pdf small PDF with info about how LAMMPS is structured
|
||||
LAMMPS.epub Manual in ePUB format
|
||||
|
||||
If you downloaded LAMMPS as a tarball from the web site, all these
|
||||
directories and files should be included.
|
||||
|
||||
If you downloaded LAMMPS from the public SVN or Git repositories, then
|
||||
the HTML and PDF files are not included. Instead you need to create
|
||||
them, in one of three ways:
|
||||
|
||||
(a) You can "fetch" the current HTML and PDF files from the LAMMPS web
|
||||
site. Just type "make fetch". This should create a html_www dir and
|
||||
Manual_www.pdf/Developer_www.pdf files. Note that if new LAMMPS
|
||||
features have been added more recently than the date of your version,
|
||||
the fetched documentation will include those changes (but your source
|
||||
code will not, unless you update your local repository).
|
||||
|
||||
(b) You can build the HTML and PDF files yourself, by typing "make
|
||||
html" followed by "make pdf". Note that the PDF make requires the
|
||||
HTML files already exist. This requires various tools including
|
||||
Sphinx, which the build process will attempt to download and install
|
||||
on your system, if not already available. See more details below.
|
||||
|
||||
(c) You can genererate an older, simpler, less-fancy style of HTML
|
||||
documentation by typing "make old". This will create an "old"
|
||||
directory. This can be useful if (b) does not work on your box for
|
||||
some reason, or you want to quickly view the HTML version of a doc
|
||||
page you have created or edited yourself within the src directory.
|
||||
E.g. if you are planning to submit a new feature to LAMMPS.
|
||||
|
||||
----------------
|
||||
|
||||
The generation of all documentation is managed by the Makefile in this
|
||||
dir.
|
||||
|
||||
----------------
|
||||
|
||||
Options:
|
||||
|
||||
make html # generate HTML in html dir using Sphinx
|
||||
@ -13,6 +50,7 @@ make pdf # generate 2 PDF files (Manual.pdf,Developer.pdf)
|
||||
make old # generate old-style HTML pages in old dir via txt2html
|
||||
make fetch # fetch HTML doc pages and 2 PDF files from web site
|
||||
# as a tarball and unpack into html dir and 2 PDFs
|
||||
make epub # generate LAMMPS.epub in ePUB format using Sphinx
|
||||
make clean # remove intermediate RST files created by HTML build
|
||||
make clean-all # remove entire build folder and any cached data
|
||||
|
||||
@ -51,3 +89,27 @@ Once Python 3 is installed, open a Terminal and type
|
||||
pip3 install virtualenv
|
||||
|
||||
This will install virtualenv from the Python Package Index.
|
||||
|
||||
----------------
|
||||
|
||||
Installing prerequisites for PDF build
|
||||
|
||||
[TBA]
|
||||
|
||||
----------------
|
||||
|
||||
Installing prerequisites for epub build
|
||||
|
||||
## ePUB
|
||||
|
||||
Same as for HTML. This uses the same tools and configuration
|
||||
files as the HTML tree.
|
||||
|
||||
For converting the generated ePUB file to a mobi format file
|
||||
(for e-book readers like Kindle, that cannot read ePUB), you
|
||||
also need to have the 'ebook-convert' tool from the "calibre"
|
||||
software installed. http://calibre-ebook.com/
|
||||
You first create the ePUB file with 'make epub' and then do:
|
||||
|
||||
ebook-convert LAMMPS.epub LAMMPS.mobi
|
||||
|
||||
|
||||
BIN
doc/src/Eqs/fix_grem.jpg
Normal file
|
After Width: | Height: | Size: 6.1 KiB |
9
doc/src/Eqs/fix_grem.tex
Normal file
@ -0,0 +1,9 @@
|
||||
\documentclass[12pt]{article}
|
||||
|
||||
\begin{document}
|
||||
|
||||
$$
|
||||
T_{eff} = \lambda + \eta (H - H_0)
|
||||
$$
|
||||
|
||||
\end{document}
|
||||
BIN
doc/src/Eqs/pair_agni.jpg
Normal file
|
After Width: | Height: | Size: 15 KiB |
|
Before Width: | Height: | Size: 1.6 KiB |
@ -1,9 +0,0 @@
|
||||
\documentclass[12pt]{article}
|
||||
\pagestyle{empty}
|
||||
\begin{document}
|
||||
|
||||
$$
|
||||
F^C = A \omega_{ij} \qquad \qquad r_{ij} < r_c
|
||||
$$
|
||||
|
||||
\end{document}
|
||||
BIN
doc/src/Eqs/pair_dpd_energy.jpg
Normal file
|
After Width: | Height: | Size: 25 KiB |
12
doc/src/Eqs/pair_dpd_energy.tex
Normal file
@ -0,0 +1,12 @@
|
||||
\documentclass[12pt]{article}
|
||||
\pagestyle{empty}
|
||||
\begin{document}
|
||||
|
||||
\begin{eqnarray*}
|
||||
du_{i}^{cond} & = & \kappa_{ij}(\frac{1}{\theta_{i}}-\frac{1}{\theta_{j}})\omega_{ij}^{2} + \alpha_{ij}\omega_{ij}\zeta_{ij}^{q}(\Delta{t})^{-1/2} \\
|
||||
du_{i}^{mech} & = & -\frac{1}{2}\gamma_{ij}\omega_{ij}^{2}(\frac{\vec{r_{ij}}}{r_{ij}}\bullet\vec{v_{ij}})^{2} -
|
||||
\frac{\sigma^{2}_{ij}}{4}(\frac{1}{m_{i}}+\frac{1}{m_{j}})\omega_{ij}^{2} -
|
||||
\frac{1}{2}\sigma_{ij}\omega_{ij}(\frac{\vec{r_{ij}}}{r_{ij}}\bullet\vec{v_{ij}})\zeta_{ij}(\Delta{t})^{-1/2} \\
|
||||
\end{eqnarray*}
|
||||
|
||||
\end{document}
|
||||
BIN
doc/src/Eqs/pair_dpd_energy_terms.jpg
Normal file
|
After Width: | Height: | Size: 8.7 KiB |
11
doc/src/Eqs/pair_dpd_energy_terms.tex
Normal file
@ -0,0 +1,11 @@
|
||||
\documentclass[12pt]{article}
|
||||
\pagestyle{empty}
|
||||
\begin{document}
|
||||
|
||||
\begin{eqnarray*}
|
||||
\alpha_{ij}^{2} & = & 2k_{B}\kappa_{ij} \\
|
||||
\sigma^{2}_{ij} & = & 2\gamma_{ij}k_{B}\Theta_{ij} \\
|
||||
\Theta_{ij}^{-1} & = & \frac{1}{2}(\frac{1}{\theta_{i}}+\frac{1}{\theta_{j}}) \\
|
||||
\end{eqnarray*}
|
||||
|
||||
\end{document}
|
||||
BIN
doc/src/Eqs/pair_tersoff_mod_c.jpg
Normal file
|
After Width: | Height: | Size: 4.1 KiB |
10
doc/src/Eqs/pair_tersoff_mod_c.tex
Normal file
@ -0,0 +1,10 @@
|
||||
\documentclass[12pt]{article}
|
||||
\pagestyle{empty}
|
||||
|
||||
\begin{document}
|
||||
|
||||
\begin{eqnarray*}
|
||||
V_{ij} & = & f_C(r_{ij}) \left[ f_R(r_{ij}) + b_{ij} f_A(r_{ij}) + c_0 \right]
|
||||
\end{eqnarray*}
|
||||
|
||||
\end{document}
|
||||
|
Before Width: | Height: | Size: 4.0 KiB After Width: | Height: | Size: 4.2 KiB |
@ -3,7 +3,7 @@
|
||||
\begin{document}
|
||||
|
||||
$$
|
||||
P = \frac{N k_B T}{V} + \frac{\sum_{i}^{N} r_i \bullet f_i}{dV}
|
||||
P = \frac{N k_B T}{V} + \frac{\sum_{i}^{N'} r_i \bullet f_i}{dV}
|
||||
$$
|
||||
|
||||
\end{document}
|
||||
|
Before Width: | Height: | Size: 4.9 KiB After Width: | Height: | Size: 5.3 KiB |
@ -4,7 +4,7 @@
|
||||
|
||||
$$
|
||||
P_{IJ} = \frac{\sum_{k}^{N} m_k v_{k_I} v_{k_J}}{V} +
|
||||
\frac{\sum_{k}^{N} r_{k_I} f_{k_J}}{V}
|
||||
\frac{\sum_{k}^{N'} r_{k_I} f_{k_J}}{V}
|
||||
$$
|
||||
|
||||
\end{document}
|
||||
|
||||
BIN
doc/src/JPG/gran_funnel.png
Normal file
|
After Width: | Height: | Size: 117 KiB |
BIN
doc/src/JPG/gran_funnel_small.jpg
Normal file
|
After Width: | Height: | Size: 2.2 KiB |
BIN
doc/src/JPG/gran_mixer.png
Normal file
|
After Width: | Height: | Size: 224 KiB |
BIN
doc/src/JPG/gran_mixer_small.jpg
Normal file
|
After Width: | Height: | Size: 3.0 KiB |
BIN
doc/src/JPG/lammps-logo.png
Normal file
|
After Width: | Height: | Size: 4.8 KiB |
BIN
doc/src/JPG/pylammps_dihedral.jpg
Normal file
|
After Width: | Height: | Size: 70 KiB |
BIN
doc/src/JPG/pylammps_mc_disordered.jpg
Normal file
|
After Width: | Height: | Size: 104 KiB |
BIN
doc/src/JPG/pylammps_mc_energies_plot.jpg
Normal file
|
After Width: | Height: | Size: 53 KiB |
BIN
doc/src/JPG/pylammps_mc_minimum.jpg
Normal file
|
After Width: | Height: | Size: 111 KiB |
@ -1,7 +1,7 @@
|
||||
<!-- HTML_ONLY -->
|
||||
<HEAD>
|
||||
<TITLE>LAMMPS Users Manual</TITLE>
|
||||
<META NAME="docnumber" CONTENT="22 Sep 2016 version">
|
||||
<META NAME="docnumber" CONTENT="22 Nov 2016 version">
|
||||
<META NAME="author" CONTENT="http://lammps.sandia.gov - Sandia National Laboratories">
|
||||
<META NAME="copyright" CONTENT="Copyright (2003) Sandia Corporation. This software and manual is distributed under the GNU General Public License.">
|
||||
</HEAD>
|
||||
@ -21,7 +21,7 @@
|
||||
<H1></H1>
|
||||
|
||||
LAMMPS Documentation :c,h3
|
||||
22 Sep 2016 version :c,h4
|
||||
22 Nov 2016 version :c,h4
|
||||
|
||||
Version info: :h4
|
||||
|
||||
@ -109,7 +109,7 @@ it gives quick access to documentation for all LAMMPS commands.
|
||||
:caption: User Documentation
|
||||
:name: userdoc
|
||||
:includehidden:
|
||||
|
||||
|
||||
Section_intro
|
||||
Section_start
|
||||
Section_commands
|
||||
@ -144,7 +144,7 @@ Indices and tables
|
||||
|
||||
* :ref:`genindex`
|
||||
* :ref:`search`
|
||||
|
||||
|
||||
END_RST -->
|
||||
|
||||
<!-- HTML_ONLY -->
|
||||
|
||||
@ -117,7 +117,7 @@ PPPM. However, 2-FFT PPPM also requires a slightly larger mesh size to
|
||||
achieve the same accuracy as 4-FFT PPPM. For problems where the FFT
|
||||
cost is the performance bottleneck (typically large problems running
|
||||
on many processors), 2-FFT PPPM may be faster than 4-FFT PPPM.
|
||||
|
||||
|
||||
Staggered PPPM performs calculations using two different meshes, one
|
||||
shifted slightly with respect to the other. This can reduce force
|
||||
aliasing errors and increase the accuracy of the method, but also
|
||||
|
||||
@ -37,14 +37,14 @@ simulation with all the settings. Rather, the input script is read
|
||||
one line at a time and each command takes effect when it is read.
|
||||
Thus this sequence of commands:
|
||||
|
||||
timestep 0.5
|
||||
run 100
|
||||
timestep 0.5
|
||||
run 100
|
||||
run 100 :pre
|
||||
|
||||
does something different than this sequence:
|
||||
|
||||
run 100
|
||||
timestep 0.5
|
||||
run 100
|
||||
timestep 0.5
|
||||
run 100 :pre
|
||||
|
||||
In the first case, the specified timestep (0.5 fmsec) is used for two
|
||||
@ -97,7 +97,7 @@ single leading "#" will comment out the entire command.
|
||||
|
||||
(3) The line is searched repeatedly for $ characters, which indicate
|
||||
variables that are replaced with a text string. See an exception in
|
||||
(6).
|
||||
(6).
|
||||
|
||||
If the $ is followed by curly brackets, then the variable name is the
|
||||
text inside the curly brackets. If no curly brackets follow the $,
|
||||
@ -106,7 +106,7 @@ the $. Thus $\{myTemp\} and $x refer to variable names "myTemp" and
|
||||
"x".
|
||||
|
||||
How the variable is converted to a text string depends on what style
|
||||
of variable it is; see the "variable"_variable doc page for details.
|
||||
of variable it is; see the "variable"_variable.html doc page for details.
|
||||
It can be a variable that stores multiple text strings, and return one
|
||||
of them. The returned text string can be multiple "words" (space
|
||||
separated) which will then be interpreted as multiple arguments in the
|
||||
@ -123,7 +123,7 @@ variable X equal (xlo+xhi)/2+sqrt(v_area)
|
||||
region 1 block $X 2 INF INF EDGE EDGE
|
||||
variable X delete :pre
|
||||
|
||||
can be replaced by
|
||||
can be replaced by
|
||||
|
||||
region 1 block $((xlo+xhi)/2+sqrt(v_area)) 2 INF INF EDGE EDGE :pre
|
||||
|
||||
@ -282,78 +282,135 @@ the "minimize"_minimize.html command. A parallel tempering
|
||||
3.4 Commands listed by category :link(cmd_4),h4
|
||||
|
||||
This section lists all LAMMPS commands, grouped by category. The
|
||||
"next section"_#cmd_5 lists the same commands alphabetically. Note
|
||||
that some style options for some commands are part of specific LAMMPS
|
||||
packages, which means they cannot be used unless the package was
|
||||
included when LAMMPS was built. Not all packages are included in a
|
||||
default LAMMPS build. These dependencies are listed as Restrictions
|
||||
in the command's documentation.
|
||||
"next section"_#cmd_5 lists the same commands alphabetically. The
|
||||
next section also includes (long) lists of style options for entries
|
||||
that appear in the following categories as a single command (fix,
|
||||
compute, pair, etc). Commands that are added by user packages are not
|
||||
included in these categories, but they are in the next section.
|
||||
|
||||
Initialization:
|
||||
|
||||
"atom_modify"_atom_modify.html, "atom_style"_atom_style.html,
|
||||
"boundary"_boundary.html, "dimension"_dimension.html,
|
||||
"newton"_newton.html, "processors"_processors.html, "units"_units.html
|
||||
"newton"_newton.html,
|
||||
"package"_package.html,
|
||||
"processors"_processors.html,
|
||||
"suffix"_suffix.html,
|
||||
"units"_units.html
|
||||
|
||||
Atom definition:
|
||||
Setup simulation box:
|
||||
|
||||
"create_atoms"_create_atoms.html, "create_box"_create_box.html,
|
||||
"lattice"_lattice.html, "read_data"_read_data.html,
|
||||
"read_dump"_read_dump.html, "read_restart"_read_restart.html,
|
||||
"region"_region.html, "replicate"_replicate.html
|
||||
"boundary"_boundary.html,
|
||||
"box"_box.html,
|
||||
"change_box"_change_box.html,
|
||||
"create_box"_create_box.html,
|
||||
"dimension"_dimension.html,
|
||||
"lattice"_lattice.html,
|
||||
"region"_region.html
|
||||
|
||||
Setup atoms:
|
||||
|
||||
"atom_modify"_atom_modify.html,
|
||||
"atom_style"_atom_style.html,
|
||||
"balance"_balance.html,
|
||||
"create_atoms"_create_atoms.html,
|
||||
"create_bonds"_create_bonds.html,
|
||||
"delete_atoms"_delete_atoms.html,
|
||||
"delete_bonds"_delete_bonds.html,
|
||||
"displace_atoms"_displace_atoms.html,
|
||||
"group"_group.html,
|
||||
"mass"_mass.html,
|
||||
"molecule"_molecule.html,
|
||||
"read_data"_read_data.html,
|
||||
"read_dump"_read_dump.html,
|
||||
"read_restart"_read_restart.html,
|
||||
"replicate"_replicate.html,
|
||||
"set"_set.html,
|
||||
"velocity"_velocity.html
|
||||
|
||||
Force fields:
|
||||
|
||||
"angle_coeff"_angle_coeff.html, "angle_style"_angle_style.html,
|
||||
"bond_coeff"_bond_coeff.html, "bond_style"_bond_style.html,
|
||||
"dielectric"_dielectric.html, "dihedral_coeff"_dihedral_coeff.html,
|
||||
"angle_coeff"_angle_coeff.html,
|
||||
"angle_style"_angle_style.html,
|
||||
"bond_coeff"_bond_coeff.html,
|
||||
"bond_style"_bond_style.html,
|
||||
"bond_write"_bond_write.html,
|
||||
"dielectric"_dielectric.html,
|
||||
"dihedral_coeff"_dihedral_coeff.html,
|
||||
"dihedral_style"_dihedral_style.html,
|
||||
"improper_coeff"_improper_coeff.html,
|
||||
"improper_style"_improper_style.html,
|
||||
"kspace_modify"_kspace_modify.html, "kspace_style"_kspace_style.html,
|
||||
"pair_coeff"_pair_coeff.html, "pair_modify"_pair_modify.html,
|
||||
"pair_style"_pair_style.html, "pair_write"_pair_write.html,
|
||||
"kspace_modify"_kspace_modify.html,
|
||||
"kspace_style"_kspace_style.html,
|
||||
"pair_coeff"_pair_coeff.html,
|
||||
"pair_modify"_pair_modify.html,
|
||||
"pair_style"_pair_style.html,
|
||||
"pair_write"_pair_write.html,
|
||||
"special_bonds"_special_bonds.html
|
||||
|
||||
Settings:
|
||||
|
||||
"comm_style"_comm_style.html, "group"_group.html, "mass"_mass.html,
|
||||
"min_modify"_min_modify.html, "min_style"_min_style.html,
|
||||
"neigh_modify"_neigh_modify.html, "neighbor"_neighbor.html,
|
||||
"reset_timestep"_reset_timestep.html, "run_style"_run_style.html,
|
||||
"set"_set.html, "timestep"_timestep.html, "velocity"_velocity.html
|
||||
"comm_modify"_comm_modify.html,
|
||||
"comm_style"_comm_style.html,
|
||||
"info"_info.html,
|
||||
"min_modify"_min_modify.html,
|
||||
"min_style"_min_style.html,
|
||||
"neigh_modify"_neigh_modify.html,
|
||||
"neighbor"_neighbor.html,
|
||||
"partition"_partition.html,
|
||||
"reset_timestep"_reset_timestep.html,
|
||||
"run_style"_run_style.html,
|
||||
"timer"_timer.html,
|
||||
"timestep"_timestep.html
|
||||
|
||||
Fixes:
|
||||
Operations within timestepping (fixes) and diagnositics (computes):
|
||||
|
||||
"fix"_fix.html, "fix_modify"_fix_modify.html, "unfix"_unfix.html
|
||||
|
||||
Computes:
|
||||
|
||||
"compute"_compute.html, "compute_modify"_compute_modify.html,
|
||||
"uncompute"_uncompute.html
|
||||
"compute"_compute.html,
|
||||
"compute_modify"_compute_modify.html,
|
||||
"fix"_fix.html,
|
||||
"fix_modify"_fix_modify.html,
|
||||
"uncompute"_uncompute.html,
|
||||
"unfix"_unfix.html
|
||||
|
||||
Output:
|
||||
|
||||
"dump"_dump.html, "dump image"_dump_image.html,
|
||||
"dump_modify"_dump_modify.html, "dump movie"_dump_image.html,
|
||||
"restart"_restart.html, "thermo"_thermo.html,
|
||||
"thermo_modify"_thermo_modify.html, "thermo_style"_thermo_style.html,
|
||||
"undump"_undump.html, "write_data"_write_data.html,
|
||||
"write_dump"_write_dump.html, "write_restart"_write_restart.html
|
||||
"dump image"_dump_image.html,
|
||||
"dump movie"_dump_image.html,
|
||||
"dump"_dump.html,
|
||||
"dump_modify"_dump_modify.html,
|
||||
"restart"_restart.html,
|
||||
"thermo"_thermo.html,
|
||||
"thermo_modify"_thermo_modify.html,
|
||||
"thermo_style"_thermo_style.html,
|
||||
"undump"_undump.html,
|
||||
"write_coeff"_write_coeff.html,
|
||||
"write_data"_write_data.html,
|
||||
"write_dump"_write_dump.html,
|
||||
"write_restart"_write_restart.html
|
||||
|
||||
Actions:
|
||||
|
||||
"delete_atoms"_delete_atoms.html, "delete_bonds"_delete_bonds.html,
|
||||
"displace_atoms"_displace_atoms.html, "change_box"_change_box.html,
|
||||
"minimize"_minimize.html, "neb"_neb.html "prd"_prd.html,
|
||||
"rerun"_rerun.html, "run"_run.html, "temper"_temper.html
|
||||
"minimize"_minimize.html,
|
||||
"neb"_neb.html,
|
||||
"prd"_prd.html,
|
||||
"rerun"_rerun.html,
|
||||
"run"_run.html,
|
||||
"tad"_tad.html,
|
||||
"temper"_temper.html
|
||||
|
||||
Miscellaneous:
|
||||
Input script control:
|
||||
|
||||
"clear"_clear.html, "echo"_echo.html, "if"_if.html,
|
||||
"include"_include.html, "jump"_jump.html, "label"_label.html,
|
||||
"log"_log.html, "next"_next.html, "print"_print.html,
|
||||
"shell"_shell.html, "variable"_variable.html
|
||||
"clear"_clear.html,
|
||||
"echo"_echo.html,
|
||||
"if"_if.html,
|
||||
"include"_include.html,
|
||||
"jump"_jump.html,
|
||||
"label"_label.html,
|
||||
"log"_log.html,
|
||||
"next"_next.html,
|
||||
"print"_print.html,
|
||||
"python"_python.html,
|
||||
"quit"_quit.html,
|
||||
"shell"_shell.html,
|
||||
"variable"_variable.html
|
||||
|
||||
:line
|
||||
|
||||
@ -471,8 +528,11 @@ These are additional commands in USER packages, which can be used if
|
||||
package"_Section_start.html#start_3.
|
||||
|
||||
"dump custom/vtk"_dump_custom_vtk.html,
|
||||
"dump nc"_dump_nc.html,
|
||||
"dump nc/mpiio"_dump_nc.html,
|
||||
"group2ndx"_group2ndx.html,
|
||||
"ndx2group"_group2ndx.html :tb(c=3,ea=c)
|
||||
"ndx2group"_group2ndx.html,
|
||||
"temper/grem"_temper_grem.html :tb(c=3,ea=c)
|
||||
|
||||
:line
|
||||
|
||||
@ -501,6 +561,7 @@ USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT.
|
||||
"bond/create"_fix_bond_create.html,
|
||||
"bond/swap"_fix_bond_swap.html,
|
||||
"box/relax"_fix_box_relax.html,
|
||||
"cmap"_fix_cmap.html,
|
||||
"controller"_fix_controller.html,
|
||||
"deform (k)"_fix_deform.html,
|
||||
"deposit"_fix_deposit.html,
|
||||
@ -515,6 +576,7 @@ USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT.
|
||||
"gcmc"_fix_gcmc.html,
|
||||
"gld"_fix_gld.html,
|
||||
"gravity (o)"_fix_gravity.html,
|
||||
"halt"_fix_halt.html,
|
||||
"heat"_fix_heat.html,
|
||||
"indent"_fix_indent.html,
|
||||
"langevin (k)"_fix_langevin.html,
|
||||
@ -570,7 +632,7 @@ USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT.
|
||||
"rigid/npt (o)"_fix_rigid.html,
|
||||
"rigid/nve (o)"_fix_rigid.html,
|
||||
"rigid/nvt (o)"_fix_rigid.html,
|
||||
"rigid/small (o)"_fix_rigid.html,
|
||||
<"rigid/small (o)"_fix_rigid.html,
|
||||
"rigid/small/nph"_fix_rigid.html,
|
||||
"rigid/small/npt"_fix_rigid.html,
|
||||
"rigid/small/nve"_fix_rigid.html,
|
||||
@ -598,6 +660,7 @@ USER-INTEL, k = KOKKOS, o = USER-OMP, t = OPT.
|
||||
"viscous"_fix_viscous.html,
|
||||
"wall/colloid"_fix_wall.html,
|
||||
"wall/gran"_fix_wall_gran.html,
|
||||
"wall/gran/region"_fix_wall_gran_region.html,
|
||||
"wall/harmonic"_fix_wall.html,
|
||||
"wall/lj1043"_fix_wall.html,
|
||||
"wall/lj126"_fix_wall.html,
|
||||
@ -616,6 +679,7 @@ package"_Section_start.html#start_3.
|
||||
"atc"_fix_atc.html,
|
||||
"ave/correlate/long"_fix_ave_correlate_long.html,
|
||||
"colvars"_fix_colvars.html,
|
||||
"dpd/energy"_fix_dpd_energy.html,
|
||||
"drude"_fix_drude.html,
|
||||
"drude/transform/direct"_fix_drude_transform.html,
|
||||
"drude/transform/reverse"_fix_drude_transform.html,
|
||||
@ -624,6 +688,7 @@ package"_Section_start.html#start_3.
|
||||
"eos/table/rx"_fix_eos_table_rx.html,
|
||||
"flow/gauss"_fix_flow_gauss.html,
|
||||
"gle"_fix_gle.html,
|
||||
"grem"_fix_grem.html,
|
||||
"imd"_fix_imd.html,
|
||||
"ipi"_fix_ipi.html,
|
||||
"langevin/drude"_fix_langevin_drude.html,
|
||||
@ -823,6 +888,8 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"body"_pair_body.html,
|
||||
"bop"_pair_bop.html,
|
||||
"born (go)"_pair_born.html,
|
||||
"born/coul/dsf"_pair_born.html,
|
||||
"born/coul/dsf/cs"_pair_born.html,
|
||||
"born/coul/long (go)"_pair_born.html,
|
||||
"born/coul/long/cs"_pair_born.html,
|
||||
"born/coul/msm (o)"_pair_born.html,
|
||||
@ -846,8 +913,8 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"coul/msm"_pair_coul.html,
|
||||
"coul/streitz"_pair_coul.html,
|
||||
"coul/wolf (ko)"_pair_coul.html,
|
||||
"dpd (o)"_pair_dpd.html,
|
||||
"dpd/tstat (o)"_pair_dpd.html,
|
||||
"dpd (go)"_pair_dpd.html,
|
||||
"dpd/tstat (go)"_pair_dpd.html,
|
||||
"dsmc"_pair_dsmc.html,
|
||||
"eam (gkot)"_pair_eam.html,
|
||||
"eam/alloy (gkot)"_pair_eam.html,
|
||||
@ -895,7 +962,7 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"lubricate/poly (o)"_pair_lubricate.html,
|
||||
"lubricateU"_pair_lubricateU.html,
|
||||
"lubricateU/poly"_pair_lubricateU.html,
|
||||
"meam (o)"_pair_meam.html,
|
||||
"meam"_pair_meam.html,
|
||||
"mie/cut (o)"_pair_mie.html,
|
||||
"morse (got)"_pair_morse.html,
|
||||
"nb3b/harmonic (o)"_pair_nb3b_harmonic.html,
|
||||
@ -916,11 +983,13 @@ KOKKOS, o = USER-OMP, t = OPT.
|
||||
"table (gko)"_pair_table.html,
|
||||
"tersoff (gkio)"_pair_tersoff.html,
|
||||
"tersoff/mod (gko)"_pair_tersoff_mod.html,
|
||||
"tersoff/mod/c (o)"_pair_tersoff_mod.html,
|
||||
"tersoff/zbl (gko)"_pair_tersoff_zbl.html,
|
||||
"tip4p/cut (o)"_pair_coul.html,
|
||||
"tip4p/long (o)"_pair_coul.html,
|
||||
"tri/lj"_pair_tri_lj.html,
|
||||
"vashishta (o)"_pair_vashishta.html,
|
||||
"vashishta (ko)"_pair_vashishta.html,
|
||||
"vashishta/table (o)"_pair_vashishta.html,
|
||||
"yukawa (go)"_pair_yukawa.html,
|
||||
"yukawa/colloid (go)"_pair_yukawa_colloid.html,
|
||||
"zbl (go)"_pair_zbl.html :tb(c=4,ea=c)
|
||||
@ -929,6 +998,7 @@ These are additional pair styles in USER packages, which can be used
|
||||
if "LAMMPS is built with the appropriate
|
||||
package"_Section_start.html#start_3.
|
||||
|
||||
"agni (o)"_pair_agni.html,
|
||||
"awpmd/cut"_pair_awpmd.html,
|
||||
"buck/mdf"_pair_mdf.html,
|
||||
"coul/cut/soft (o)"_pair_lj_soft.html,
|
||||
@ -955,7 +1025,7 @@ package"_Section_start.html#start_3.
|
||||
"lj/sdk/coul/long (go)"_pair_sdk.html,
|
||||
"lj/sdk/coul/msm (o)"_pair_sdk.html,
|
||||
"lj/sf (o)"_pair_lj_sf.html,
|
||||
"meam/spline"_pair_meam_spline.html,
|
||||
"meam/spline (o)"_pair_meam_spline.html,
|
||||
"meam/sw/spline"_pair_meam_sw_spline.html,
|
||||
"mgpt"_pair_mgpt.html,
|
||||
"morse/smooth/linear"_pair_morse.html,
|
||||
|
||||
@ -159,7 +159,7 @@ As a last resort, you can send an email directly to the
|
||||
These are two alphabetic lists of the "ERROR"_#error and
|
||||
"WARNING"_#warn messages LAMMPS prints out and the reason why. If the
|
||||
explanation here is not sufficient, the documentation for the
|
||||
offending command may help.
|
||||
offending command may help.
|
||||
Error and warning messages also list the source file and line number
|
||||
where the error was generated. For example, this message
|
||||
|
||||
@ -8116,11 +8116,11 @@ boundary of a processor's sub-domain has moved more than 1/2 the
|
||||
rebuilt and atoms being migrated to new processors. This also means
|
||||
you may be missing pairwise interactions that need to be computed.
|
||||
The solution is to change the re-neighboring criteria via the
|
||||
"neigh_modify"_neigh_modify command. The safest settings are "delay 0
|
||||
every 1 check yes". Second, it may mean that an atom has moved far
|
||||
outside a processor's sub-domain or even the entire simulation box.
|
||||
This indicates bad physics, e.g. due to highly overlapping atoms, too
|
||||
large a timestep, etc. :dd
|
||||
"neigh_modify"_neigh_modify.html command. The safest settings are
|
||||
"delay 0 every 1 check yes". Second, it may mean that an atom has
|
||||
moved far outside a processor's sub-domain or even the entire
|
||||
simulation box. This indicates bad physics, e.g. due to highly
|
||||
overlapping atoms, too large a timestep, etc. :dd
|
||||
|
||||
{Out of range atoms - cannot compute PPPM} :dt
|
||||
|
||||
@ -8132,11 +8132,11 @@ boundary of a processor's sub-domain has moved more than 1/2 the
|
||||
rebuilt and atoms being migrated to new processors. This also means
|
||||
you may be missing pairwise interactions that need to be computed.
|
||||
The solution is to change the re-neighboring criteria via the
|
||||
"neigh_modify"_neigh_modify command. The safest settings are "delay 0
|
||||
every 1 check yes". Second, it may mean that an atom has moved far
|
||||
outside a processor's sub-domain or even the entire simulation box.
|
||||
This indicates bad physics, e.g. due to highly overlapping atoms, too
|
||||
large a timestep, etc. :dd
|
||||
"neigh_modify"_neigh_modify.html command. The safest settings are
|
||||
"delay 0 every 1 check yes". Second, it may mean that an atom has
|
||||
moved far outside a processor's sub-domain or even the entire
|
||||
simulation box. This indicates bad physics, e.g. due to highly
|
||||
overlapping atoms, too large a timestep, etc. :dd
|
||||
|
||||
{Out of range atoms - cannot compute PPPMDisp} :dt
|
||||
|
||||
@ -8148,11 +8148,11 @@ boundary of a processor's sub-domain has moved more than 1/2 the
|
||||
rebuilt and atoms being migrated to new processors. This also means
|
||||
you may be missing pairwise interactions that need to be computed.
|
||||
The solution is to change the re-neighboring criteria via the
|
||||
"neigh_modify"_neigh_modify command. The safest settings are "delay 0
|
||||
every 1 check yes". Second, it may mean that an atom has moved far
|
||||
outside a processor's sub-domain or even the entire simulation box.
|
||||
This indicates bad physics, e.g. due to highly overlapping atoms, too
|
||||
large a timestep, etc. :dd
|
||||
"neigh_modify"_neigh_modify.html command. The safest settings are
|
||||
"delay 0 every 1 check yes". Second, it may mean that an atom has
|
||||
moved far outside a processor's sub-domain or even the entire
|
||||
simulation box. This indicates bad physics, e.g. due to highly
|
||||
overlapping atoms, too large a timestep, etc. :dd
|
||||
|
||||
{Overflow of allocated fix vector storage} :dt
|
||||
|
||||
|
||||
@ -54,30 +54,30 @@ accelerate: run with various acceleration options (OpenMP, GPU, Phi)
|
||||
balance: dynamic load balancing, 2d system
|
||||
body: body particles, 2d system
|
||||
colloid: big colloid particles in a small particle solvent, 2d system
|
||||
comb: models using the COMB potential
|
||||
comb: models using the COMB potential
|
||||
coreshell: core/shell model using CORESHELL package
|
||||
crack: crack propagation in a 2d solid
|
||||
crack: crack propagation in a 2d solid
|
||||
deposit: deposit atoms and molecules on a surface
|
||||
dipole: point dipolar particles, 2d system
|
||||
dreiding: methanol via Dreiding FF
|
||||
eim: NaCl using the EIM potential
|
||||
ellipse: ellipsoidal particles in spherical solvent, 2d system
|
||||
flow: Couette and Poiseuille flow in a 2d channel
|
||||
flow: Couette and Poiseuille flow in a 2d channel
|
||||
friction: frictional contact of spherical asperities between 2d surfaces
|
||||
hugoniostat: Hugoniostat shock dynamics
|
||||
indent: spherical indenter into a 2d solid
|
||||
indent: spherical indenter into a 2d solid
|
||||
kim: use of potentials in Knowledge Base for Interatomic Models (KIM)
|
||||
meam: MEAM test for SiC and shear (same as shear examples)
|
||||
melt: rapid melt of 3d LJ system
|
||||
meam: MEAM test for SiC and shear (same as shear examples)
|
||||
melt: rapid melt of 3d LJ system
|
||||
micelle: self-assembly of small lipid-like molecules into 2d bilayers
|
||||
min: energy minimization of 2d LJ melt
|
||||
msst: MSST shock dynamics
|
||||
min: energy minimization of 2d LJ melt
|
||||
msst: MSST shock dynamics
|
||||
nb3b: use of nonbonded 3-body harmonic pair style
|
||||
neb: nudged elastic band (NEB) calculation for barrier finding
|
||||
nemd: non-equilibrium MD of 2d sheared system
|
||||
neb: nudged elastic band (NEB) calculation for barrier finding
|
||||
nemd: non-equilibrium MD of 2d sheared system
|
||||
obstacle: flow around two voids in a 2d channel
|
||||
peptide: dynamics of a small solvated peptide chain (5-mer)
|
||||
peri: Peridynamic model of cylinder impacted by indenter
|
||||
peri: Peridynamic model of cylinder impacted by indenter
|
||||
pour: pouring of granular particles into a 3d box, then chute flow
|
||||
prd: parallel replica dynamics of vacancy diffusion in bulk Si
|
||||
python: using embedded Python in a LAMMPS input script
|
||||
@ -105,8 +105,8 @@ web site.
|
||||
|
||||
If you uncomment the "dump image"_dump_image.html line(s) in the input
|
||||
script a series of JPG images will be produced by the run (assuming
|
||||
you built LAMMPS with JPG support; see "Section start
|
||||
2.2"_Section_start.html for details). These can be viewed
|
||||
you built LAMMPS with JPG support; see "Section
|
||||
2.2"_Section_start.html#start_2 for details). These can be viewed
|
||||
individually or turned into a movie or animated by tools like
|
||||
ImageMagick or QuickTime or various Windows-based tools. See the
|
||||
"dump image"_dump_image.html doc page for more details. E.g. this
|
||||
@ -120,7 +120,7 @@ browser.
|
||||
Uppercase directories :h4
|
||||
|
||||
ASPHERE: various aspherical particle models, using ellipsoids, rigid bodies, line/triangle particles, etc
|
||||
COUPLE: examples of how to use LAMMPS as a library
|
||||
COUPLE: examples of how to use LAMMPS as a library
|
||||
DIFFUSE: compute diffusion coefficients via several methods
|
||||
ELASTIC: compute elastic constants at zero temperature
|
||||
ELASTIC_T: compute elastic constants at finite temperature
|
||||
@ -136,5 +136,5 @@ The USER directory has a large number of sub-directories which
|
||||
correspond by name to a USER package. They contain scripts that
|
||||
illustrate how to use the command(s) provided in that package. Many
|
||||
of the sub-directories have their own README files which give further
|
||||
instructions. See the "Section packages"_Section_packages.html doc
|
||||
instructions. See the "Section 4"_Section_packages.html doc
|
||||
page for more info on specific USER packages.
|
||||
|
||||
@ -37,7 +37,7 @@ pitfalls or alternatives.
|
||||
|
||||
Please see some of the closed issues for examples of how to
|
||||
suggest code enhancements, submit proposed changes, or report
|
||||
elated issues and how they are resoved.
|
||||
possible bugs and how they are resoved.
|
||||
|
||||
As an alternative to using GitHub, you may e-mail the
|
||||
"core developers"_http://lammps.sandia.gov/authors.html or send
|
||||
@ -71,7 +71,7 @@ a parallel framework similar to LAMMPS. Most notably, these have
|
||||
included many-body potentials - Stillinger-Weber, Tersoff, ReaxFF -
|
||||
and the associated charge-equilibration routines needed for ReaxFF.
|
||||
|
||||
The "History link"_http://lammps.sandia.gov/history.html on the
|
||||
The "History link"_http://lammps.sandia.gov/history.html on the
|
||||
LAMMPS WWW page gives a timeline of features added to the
|
||||
C++ open-source version of LAMMPS over the last several years.
|
||||
|
||||
@ -80,7 +80,7 @@ site"_lws, except for Warp & GranFlow which were primarily used
|
||||
internally. A brief listing of their features is given here.
|
||||
|
||||
LAMMPS 2001
|
||||
|
||||
|
||||
F90 + MPI
|
||||
dynamic memory
|
||||
spatial-decomposition parallelism
|
||||
@ -96,7 +96,7 @@ LAMMPS 2001
|
||||
user-defined diagnostics :ul
|
||||
|
||||
LAMMPS 99
|
||||
|
||||
|
||||
F77 + MPI
|
||||
static memory allocation
|
||||
spatial-decomposition parallelism
|
||||
|
||||
@ -4,7 +4,7 @@
|
||||
:link(ld,Manual.html)
|
||||
:link(lc,Section_commands.html#comm)
|
||||
|
||||
:line
|
||||
:line
|
||||
|
||||
6. How-to discussions :h3
|
||||
|
||||
@ -68,7 +68,7 @@ Look at the {in.chain} input script provided in the {bench} directory
|
||||
of the LAMMPS distribution to see the original script that these 2
|
||||
scripts are based on. If that script had the line
|
||||
|
||||
restart 50 tmp.restart :pre
|
||||
restart 50 tmp.restart :pre
|
||||
|
||||
added to it, it would produce 2 binary restart files (tmp.restart.50
|
||||
and tmp.restart.100) as it ran.
|
||||
@ -76,17 +76,17 @@ and tmp.restart.100) as it ran.
|
||||
This script could be used to read the 1st restart file and re-run the
|
||||
last 50 timesteps:
|
||||
|
||||
read_restart tmp.restart.50 :pre
|
||||
read_restart tmp.restart.50 :pre
|
||||
|
||||
neighbor 0.4 bin
|
||||
neigh_modify every 1 delay 1 :pre
|
||||
neighbor 0.4 bin
|
||||
neigh_modify every 1 delay 1 :pre
|
||||
|
||||
fix 1 all nve
|
||||
fix 2 all langevin 1.0 1.0 10.0 904297 :pre
|
||||
fix 1 all nve
|
||||
fix 2 all langevin 1.0 1.0 10.0 904297 :pre
|
||||
|
||||
timestep 0.012 :pre
|
||||
timestep 0.012 :pre
|
||||
|
||||
run 50 :pre
|
||||
run 50 :pre
|
||||
|
||||
Note that the following commands do not need to be repeated because
|
||||
their settings are included in the restart file: {units, atom_style,
|
||||
@ -107,25 +107,25 @@ lmp_g++ -r tmp.restart.50 tmp.restart.data :pre
|
||||
|
||||
Then, this script could be used to re-run the last 50 steps:
|
||||
|
||||
units lj
|
||||
atom_style bond
|
||||
pair_style lj/cut 1.12
|
||||
pair_modify shift yes
|
||||
bond_style fene
|
||||
units lj
|
||||
atom_style bond
|
||||
pair_style lj/cut 1.12
|
||||
pair_modify shift yes
|
||||
bond_style fene
|
||||
special_bonds 0.0 1.0 1.0 :pre
|
||||
|
||||
read_data tmp.restart.data :pre
|
||||
read_data tmp.restart.data :pre
|
||||
|
||||
neighbor 0.4 bin
|
||||
neigh_modify every 1 delay 1 :pre
|
||||
neighbor 0.4 bin
|
||||
neigh_modify every 1 delay 1 :pre
|
||||
|
||||
fix 1 all nve
|
||||
fix 2 all langevin 1.0 1.0 10.0 904297 :pre
|
||||
fix 1 all nve
|
||||
fix 2 all langevin 1.0 1.0 10.0 904297 :pre
|
||||
|
||||
timestep 0.012 :pre
|
||||
timestep 0.012 :pre
|
||||
|
||||
reset_timestep 50
|
||||
run 50 :pre
|
||||
reset_timestep 50
|
||||
run 50 :pre
|
||||
|
||||
Note that nearly all the settings specified in the original {in.chain}
|
||||
script must be repeated, except the {pair_coeff} and {bond_coeff}
|
||||
@ -522,7 +522,7 @@ H mass = 1.008
|
||||
O charge = -1.040
|
||||
H charge = 0.520
|
||||
r0 of OH bond = 0.9572
|
||||
theta of HOH angle = 104.52
|
||||
theta of HOH angle = 104.52
|
||||
OM distance = 0.15
|
||||
LJ epsilon of O-O = 0.1550
|
||||
LJ sigma of O-O = 3.1536
|
||||
@ -629,7 +629,7 @@ the SPC and SPC/E models.
|
||||
Wikipedia also has a nice article on "water
|
||||
models"_http://en.wikipedia.org/wiki/Water_model.
|
||||
|
||||
:line
|
||||
:line
|
||||
|
||||
6.10 Coupling LAMMPS to other codes :link(howto_10),h4
|
||||
|
||||
@ -729,7 +729,7 @@ LAMMPS and half to the other code and run both codes simultaneously
|
||||
before syncing them up periodically. Or it might instantiate multiple
|
||||
instances of LAMMPS to perform different calculations.
|
||||
|
||||
:line
|
||||
:line
|
||||
|
||||
6.11 Visualizing LAMMPS snapshots :link(howto_11),h4
|
||||
|
||||
@ -832,7 +832,7 @@ rotation of [A], [B], and [C] and can be computed as follows:
|
||||
|
||||
where A = | [A] | indicates the scalar length of [A]. The hat symbol (^)
|
||||
indicates the corresponding unit vector. {beta} and {gamma} are angles
|
||||
between the vectors described below. Note that by construction,
|
||||
between the vectors described below. Note that by construction,
|
||||
[a], [b], and [c] have strictly positive x, y, and z components, respectively.
|
||||
If it should happen that
|
||||
[A], [B], and [C] form a left-handed basis, then the above equations
|
||||
@ -841,17 +841,17 @@ to first apply an inversion. This can be achieved
|
||||
by interchanging two basis vectors or by changing the sign of one of them.
|
||||
|
||||
For consistency, the same rotation/inversion applied to the basis vectors
|
||||
must also be applied to atom positions, velocities,
|
||||
must also be applied to atom positions, velocities,
|
||||
and any other vector quantities.
|
||||
This can be conveniently achieved by first converting to
|
||||
This can be conveniently achieved by first converting to
|
||||
fractional coordinates in the
|
||||
old basis and then converting to distance coordinates in the new basis.
|
||||
The transformation is given by the following equation:
|
||||
|
||||
:c,image(Eqs/rotate.jpg)
|
||||
|
||||
where {V} is the volume of the box, [X] is the original vector quantity and
|
||||
[x] is the vector in the LAMMPS basis.
|
||||
where {V} is the volume of the box, [X] is the original vector quantity and
|
||||
[x] is the vector in the LAMMPS basis.
|
||||
|
||||
There is no requirement that a triclinic box be periodic in any
|
||||
dimension, though it typically should be in at least the 2nd dimension
|
||||
@ -938,17 +938,17 @@ defined above. The relationship between these 6 quantities
|
||||
(a,b,c,alpha,beta,gamma) and the LAMMPS box sizes (lx,ly,lz) =
|
||||
(xhi-xlo,yhi-ylo,zhi-zlo) and tilt factors (xy,xz,yz) is as follows:
|
||||
|
||||
:c,image(Eqs/box.jpg)
|
||||
:c,image(Eqs/box.jpg)
|
||||
|
||||
The inverse relationship can be written as follows:
|
||||
|
||||
:c,image(Eqs/box_inverse.jpg)
|
||||
:c,image(Eqs/box_inverse.jpg)
|
||||
|
||||
The values of {a}, {b}, {c} , {alpha}, {beta} , and {gamma} can be printed
|
||||
out or accessed by computes using the
|
||||
"thermo_style custom"_thermo_style.html keywords
|
||||
The values of {a}, {b}, {c} , {alpha}, {beta} , and {gamma} can be printed
|
||||
out or accessed by computes using the
|
||||
"thermo_style custom"_thermo_style.html keywords
|
||||
{cella}, {cellb}, {cellc}, {cellalpha}, {cellbeta}, {cellgamma},
|
||||
respectively.
|
||||
respectively.
|
||||
|
||||
As discussed on the "dump"_dump.html command doc page, when the BOX
|
||||
BOUNDS for a snapshot is written to a dump file for a triclinic box,
|
||||
@ -1854,13 +1854,19 @@ internal LAMMPS operations. Note that LAMMPS classes are defined
|
||||
within a LAMMPS namespace (LAMMPS_NS) if you use them from another C++
|
||||
application.
|
||||
|
||||
Library.cpp contains these 5 basic functions:
|
||||
Library.cpp contains these functions for creating and destroying an
|
||||
instance of LAMMPS and sending it commands to execute. See the
|
||||
documentation in the src/library.cpp file for details:
|
||||
|
||||
void lammps_open(int, char **, MPI_Comm, void **)
|
||||
void lammps_open_no_mpi(int, char **, void **)
|
||||
void lammps_close(void *)
|
||||
int lammps_version(void *)
|
||||
void lammps_file(void *, char *)
|
||||
char *lammps_command(void *, char *) :pre
|
||||
char *lammps_command(void *, char *)
|
||||
void lammps_commands_list(void *, int, char **)
|
||||
void lammps_commands_string(void *, char *)
|
||||
void lammps_free(void *) :pre
|
||||
|
||||
The lammps_open() function is used to initialize LAMMPS, passing in a
|
||||
list of strings as if they were "command-line
|
||||
@ -1880,6 +1886,10 @@ half to the other code and run both codes simultaneously before
|
||||
syncing them up periodically. Or it might instantiate multiple
|
||||
instances of LAMMPS to perform different calculations.
|
||||
|
||||
The lammps_open_no_mpi() function is similar except that no MPI
|
||||
communicator is passed from the caller. Instead, MPI_COMM_WORLD is
|
||||
used to instantiate LAMMPS, and MPI is initialzed if necessary.
|
||||
|
||||
The lammps_close() function is used to shut down an instance of LAMMPS
|
||||
and free all its memory.
|
||||
|
||||
@ -1891,44 +1901,93 @@ changes to the LAMMPS command syntax between versions. The returned
|
||||
LAMMPS version code is an integer (e.g. 2 Sep 2015 results in
|
||||
20150902) that grows with every new LAMMPS version.
|
||||
|
||||
The lammps_file() and lammps_command() functions are used to pass a
|
||||
file or string to LAMMPS as if it were an input script or single
|
||||
command in an input script. Thus the calling code can read or
|
||||
generate a series of LAMMPS commands one line at a time and pass it
|
||||
thru the library interface to setup a problem and then run it,
|
||||
interleaving the lammps_command() calls with other calls to extract
|
||||
information from LAMMPS, perform its own operations, or call another
|
||||
code's library.
|
||||
The lammps_file(), lammps_command(), lammps_commands_list(), and
|
||||
lammps_commands_string() functions are used to pass one or more
|
||||
commands to LAMMPS to execute, the same as if they were coming from an
|
||||
input script.
|
||||
|
||||
Other useful functions are also included in library.cpp. For example:
|
||||
Via these functions, the calling code can read or generate a series of
|
||||
LAMMPS commands one or multiple at a time and pass it thru the library
|
||||
interface to setup a problem and then run it in stages. The caller
|
||||
can interleave the command function calls with operations it performs,
|
||||
calls to extract information from or set information within LAMMPS, or
|
||||
calls to another code's library.
|
||||
|
||||
The lammps_file() function passes the filename of an input script.
|
||||
The lammps_command() function passes a single command as a string.
|
||||
The lammps_commands_list() function passes multiple commands in a
|
||||
char** list. In both lammps_command() and lammps_commands_list(),
|
||||
individual commands may or may not have a trailing newline. The
|
||||
lammps_commands_string() function passes multiple commands
|
||||
concatenated into one long string, separated by newline characters.
|
||||
In both lammps_commands_list() and lammps_commands_string(), a single
|
||||
command can be spread across multiple lines, if the last printable
|
||||
character of all but the last line is "&", the same as if the lines
|
||||
appeared in an input script.
|
||||
|
||||
The lammps_free() function is a clean-up function to free memory that
|
||||
the library allocated previously via other function calls. See
|
||||
comments in src/library.cpp file for which other functions need this
|
||||
clean-up.
|
||||
|
||||
Library.cpp also contains these functions for extracting information
|
||||
from LAMMPS and setting value within LAMMPS. Again, see the
|
||||
documentation in the src/library.cpp file for details, including
|
||||
which quantities can be queried by name:
|
||||
|
||||
void *lammps_extract_global(void *, char *)
|
||||
void *lammps_extract_atom(void *, char *)
|
||||
void *lammps_extract_compute(void *, char *, int, int)
|
||||
void *lammps_extract_fix(void *, char *, int, int, int, int)
|
||||
void *lammps_extract_variable(void *, char *, char *)
|
||||
void *lammps_extract_variable(void *, char *, char *) :pre
|
||||
|
||||
int lammps_set_variable(void *, char *, char *)
|
||||
double lammps_get_thermo(void *, char *) :pre
|
||||
|
||||
int lammps_get_natoms(void *)
|
||||
void lammps_get_coords(void *, double *)
|
||||
void lammps_put_coords(void *, double *) :pre
|
||||
void lammps_gather_atoms(void *, double *)
|
||||
void lammps_scatter_atoms(void *, double *) :pre
|
||||
void lammps_create_atoms(void *, int, tagint *, int *, double *, double *) :pre
|
||||
|
||||
These can extract various global or per-atom quantities from LAMMPS as
|
||||
well as values calculated by a compute, fix, or variable. The
|
||||
"set_variable" function can set an existing string-style variable to a
|
||||
new value, so that subsequent LAMMPS commands can access the variable.
|
||||
The "get" and "put" operations can retrieve and reset atom
|
||||
coordinates. See the library.cpp file and its associated header file
|
||||
library.h for details.
|
||||
The extract functions return a pointer to various global or per-atom
|
||||
quantities stored in LAMMPS or to values calculated by a compute, fix,
|
||||
or variable. The pointer returned by the extract_global() function
|
||||
can be used as a permanent reference to a value which may change. For
|
||||
the other extract functions, the underlying storage may be reallocated
|
||||
as LAMMPS runs, so you need to re-call the function to assure a
|
||||
current pointer or returned value(s).
|
||||
|
||||
The key idea of the library interface is that you can write any
|
||||
functions you wish to define how your code talks to LAMMPS and add
|
||||
them to src/library.cpp and src/library.h, as well as to the "Python
|
||||
interface"_Section_python.html. The routines you add can access or
|
||||
change any LAMMPS data you wish. The examples/COUPLE and python
|
||||
directories have example C++ and C and Python codes which show how a
|
||||
driver code can link to LAMMPS as a library, run LAMMPS on a subset of
|
||||
processors, grab data from LAMMPS, change it, and put it back into
|
||||
LAMMPS.
|
||||
The lammps_set_variable() function can set an existing string-style
|
||||
variable to a new string value, so that subsequent LAMMPS commands can
|
||||
access the variable. The lammps_get_thermo() function returns the
|
||||
current value of a thermo keyword as a double.
|
||||
|
||||
The lammps_get_natoms() function returns the total number of atoms in
|
||||
the system and can be used by the caller to allocate space for the
|
||||
lammps_gather_atoms() and lammps_scatter_atoms() functions. The
|
||||
gather function collects atom info of the requested type (atom coords,
|
||||
types, forces, etc) from all procsesors, orders them by atom ID, and
|
||||
returns a full list to each calling processor. The scatter function
|
||||
does the inverse. It distributes the same kinds of values,
|
||||
passed by the caller, to each atom owned by individual processors.
|
||||
|
||||
The lammps_create_atoms() function takes a list of N atoms as input
|
||||
with atom types and coords (required), an optionally atom IDs and
|
||||
velocities. It uses the coords of each atom to assign it as a new
|
||||
atom to the processor that owns it. Additional properties for the new
|
||||
atoms can be assigned via the lammps_scatter_atoms() or
|
||||
lammps_extract_atom() functions.
|
||||
|
||||
The examples/COUPLE and python directories have example C++ and C and
|
||||
Python codes which show how a driver code can link to LAMMPS as a
|
||||
library, run LAMMPS on a subset of processors, grab data from LAMMPS,
|
||||
change it, and put it back into LAMMPS.
|
||||
|
||||
NOTE: You can write code for additional functions as needed to define
|
||||
how your code talks to LAMMPS and add them to src/library.cpp and
|
||||
src/library.h, as well as to the "Python
|
||||
interface"_Section_python.html. The added functions can access or
|
||||
change any LAMMPS data you wish.
|
||||
|
||||
:line
|
||||
|
||||
@ -2092,11 +2151,11 @@ lattice fcc 5.376 orient x 1 0 0 orient y 0 1 0 orient z 0 0 1
|
||||
region box block 0 4 0 4 0 4
|
||||
create_box 1 box
|
||||
create_atoms 1 box
|
||||
mass 1 39.948
|
||||
mass 1 39.948
|
||||
pair_style lj/cut 13.0
|
||||
pair_coeff * * 0.2381 3.405
|
||||
timestep $\{dt\}
|
||||
thermo $d :pre
|
||||
thermo $d :pre
|
||||
|
||||
# equilibration and thermalization :pre
|
||||
|
||||
@ -2123,14 +2182,14 @@ thermo_style custom step temp press v_pxy v_pxz v_pyz v_v11 v_v22 v_v33
|
||||
run 100000
|
||||
variable v equal (v_v11+v_v22+v_v33)/3.0
|
||||
variable ndens equal count(all)/vol
|
||||
print "average viscosity: $v \[Pa.s/] @ $T K, $\{ndens\} /A^3" :pre
|
||||
print "average viscosity: $v \[Pa.s\] @ $T K, $\{ndens\} /A^3" :pre
|
||||
|
||||
The fifth method is related to the above Green-Kubo method,
|
||||
but uses the Einstein formulation, analogous to the Einstein
|
||||
mean-square-displacement formulation for self-diffusivity. The
|
||||
time-integrated momentum fluxes play the role of Cartesian
|
||||
coordinates, whose mean-square displacement increases linearly
|
||||
with time at sufficiently long times.
|
||||
with time at sufficiently long times.
|
||||
|
||||
:line
|
||||
|
||||
@ -2510,8 +2569,8 @@ the electrostatic environment inducing polarizability.
|
||||
Technically, shells are attached to the cores by a spring force f =
|
||||
k*r where k is a parametrized spring constant and r is the distance
|
||||
between the core and the shell. The charges of the core and the shell
|
||||
add up to the ion charge, thus q(ion) = q(core) + q(shell). This
|
||||
setup introduces the ion polarizability (alpha) given by
|
||||
add up to the ion charge, thus q(ion) = q(core) + q(shell). This
|
||||
setup introduces the ion polarizability (alpha) given by
|
||||
alpha = q(shell)^2 / k. In a
|
||||
similar fashion the mass of the ion is distributed on the core and the
|
||||
shell with the core having the larger mass.
|
||||
@ -2526,7 +2585,7 @@ for NaCl, as found in examples/coreshell, has this format:
|
||||
432 atoms # core and shell atoms
|
||||
216 bonds # number of core/shell springs :pre
|
||||
|
||||
4 atom types # 2 cores and 2 shells for Na and Cl
|
||||
4 atom types # 2 cores and 2 shells for Na and Cl
|
||||
2 bond types :pre
|
||||
|
||||
0.0 24.09597 xlo xhi
|
||||
@ -2545,19 +2604,19 @@ Atoms :pre
|
||||
1 1 2 1.5005 0.00000000 0.00000000 0.00000000 # core of core/shell pair 1
|
||||
2 1 4 -2.5005 0.00000000 0.00000000 0.00000000 # shell of core/shell pair 1
|
||||
3 2 1 1.5056 4.01599500 4.01599500 4.01599500 # core of core/shell pair 2
|
||||
4 2 3 -0.5056 4.01599500 4.01599500 4.01599500 # shell of core/shell pair 2
|
||||
4 2 3 -0.5056 4.01599500 4.01599500 4.01599500 # shell of core/shell pair 2
|
||||
(...) :pre
|
||||
|
||||
Bonds # Bond topology for spring forces :pre
|
||||
|
||||
1 2 1 2 # spring for core/shell pair 1
|
||||
2 2 3 4 # spring for core/shell pair 2
|
||||
2 2 3 4 # spring for core/shell pair 2
|
||||
(...) :pre
|
||||
|
||||
Non-Coulombic (e.g. Lennard-Jones) pairwise interactions are only
|
||||
defined between the shells. Coulombic interactions are defined
|
||||
between all cores and shells. If desired, additional bonds can be
|
||||
specified between cores.
|
||||
specified between cores.
|
||||
|
||||
The "special_bonds"_special_bonds.html command should be used to
|
||||
turn-off the Coulombic interaction within core/shell pairs, since that
|
||||
@ -2620,7 +2679,7 @@ Note that to perform thermostatting using this definition of
|
||||
temperature, the "fix modify temp"_fix_modify.html command should be
|
||||
used to assign the compute to the thermostat fix. Likewise the
|
||||
"thermo_modify temp"_thermo_modify.html command can be used to make
|
||||
this temperature be output for the overall system.
|
||||
this temperature be output for the overall system.
|
||||
|
||||
For the NaCl example, this can be done as follows:
|
||||
|
||||
@ -2632,13 +2691,13 @@ fix thermostatequ all nve # integrator as needed f
|
||||
fix_modify thermoberendsen temp CSequ
|
||||
thermo_modify temp CSequ # output of center-of-mass derived temperature :pre
|
||||
|
||||
If "compute temp/cs"_compute_temp_cs.html is used, the decoupled
|
||||
relative motion of the core and the shell should in theory be
|
||||
If "compute temp/cs"_compute_temp_cs.html is used, the decoupled
|
||||
relative motion of the core and the shell should in theory be
|
||||
stable. However numerical fluctuation can introduce a small
|
||||
momentum to the system, which is noticable over long trajectories.
|
||||
Therefore it is recomendable to use the "fix
|
||||
momentum"_fix_momentum.html command in combination with "compute
|
||||
temp/cs"_compute_temp_cs.html when equilibrating the system to
|
||||
Therefore it is recomendable to use the "fix
|
||||
momentum"_fix_momentum.html command in combination with "compute
|
||||
temp/cs"_compute_temp_cs.html when equilibrating the system to
|
||||
prevent any drift.
|
||||
|
||||
When intializing the velocities of a system with core/shell pairs, it
|
||||
@ -2661,17 +2720,17 @@ to the electrostatic environment. This fast movement also limits the
|
||||
timestep size that can be used.
|
||||
|
||||
The primary literature of the adiabatic core/shell model suggests that
|
||||
the fast relative motion of the core/shell pairs only allows negligible
|
||||
the fast relative motion of the core/shell pairs only allows negligible
|
||||
energy transfer to the environment. Therefore it is not intended to
|
||||
decouple the core/shell degree of freedom from the physical system
|
||||
during production runs. In other words, the "compute
|
||||
temp/cs"_compute_temp_cs.html command should not be used during
|
||||
production runs and is only required during equilibration. This way one
|
||||
is consistent with literature (based on the code packages DL_POLY or
|
||||
production runs and is only required during equilibration. This way one
|
||||
is consistent with literature (based on the code packages DL_POLY or
|
||||
GULP for instance).
|
||||
|
||||
The mentioned energy transfer will typically lead to a a small drift
|
||||
in total energy over time. This internal energy can be monitored
|
||||
The mentioned energy transfer will typically lead to a small drift
|
||||
in total energy over time. This internal energy can be monitored
|
||||
using the "compute chunk/atom"_compute_chunk_atom.html and "compute
|
||||
temp/chunk"_compute_temp_chunk.html commands. The internal kinetic
|
||||
energies of each core/shell pair can then be summed using the sum()
|
||||
@ -2702,14 +2761,14 @@ The additional section in the date file would be formatted like this:
|
||||
|
||||
CS-Info # header of additional section :pre
|
||||
|
||||
1 1 # column 1 = atom ID, column 2 = core/shell ID
|
||||
2 1
|
||||
3 2
|
||||
4 2
|
||||
5 3
|
||||
6 3
|
||||
7 4
|
||||
8 4
|
||||
1 1 # column 1 = atom ID, column 2 = core/shell ID
|
||||
2 1
|
||||
3 2
|
||||
4 2
|
||||
5 3
|
||||
6 3
|
||||
7 4
|
||||
8 4
|
||||
(...) :pre
|
||||
|
||||
:line
|
||||
@ -2771,7 +2830,7 @@ temp/drude"_compute_temp_drude.html. This requires also to use the
|
||||
command {comm_modify vel yes}.
|
||||
|
||||
Short-range damping of the induced dipole interactions can be achieved
|
||||
using Thole functions through the the "pair style
|
||||
using Thole functions through the "pair style
|
||||
thole"_pair_thole.html in "pair_style hybrid/overlay"_pair_hybrid.html
|
||||
with a Coulomb pair style. It may be useful to use {coul/long/cs} or
|
||||
similar from the CORESHELL package if the core and Drude particle come
|
||||
|
||||
@ -181,7 +181,7 @@ Atom creation :h5
|
||||
displace atoms :ul
|
||||
|
||||
Ensembles, constraints, and boundary conditions :h5
|
||||
("fix"_fix.html command)
|
||||
("fix"_fix.html command)
|
||||
|
||||
2d or 3d systems
|
||||
orthogonal or non-orthogonal (triclinic symmetry) simulation domains
|
||||
@ -199,7 +199,7 @@ Ensembles, constraints, and boundary conditions :h5
|
||||
variety of additional boundary conditions and constraints :ul
|
||||
|
||||
Integrators :h5
|
||||
("run"_run.html, "run_style"_run_style.html, "minimize"_minimize.html commands)
|
||||
("run"_run.html, "run_style"_run_style.html, "minimize"_minimize.html commands)
|
||||
|
||||
velocity-Verlet integrator
|
||||
Brownian dynamics
|
||||
@ -213,7 +213,7 @@ Diagnostics :h5
|
||||
see the various flavors of the "fix"_fix.html and "compute"_compute.html commands :ul
|
||||
|
||||
Output :h5
|
||||
("dump"_dump.html, "restart"_restart.html commands)
|
||||
("dump"_dump.html, "restart"_restart.html commands)
|
||||
|
||||
log file of thermodynamic info
|
||||
text dump files of atom coords, velocities, other per-atom quantities
|
||||
@ -366,11 +366,11 @@ complementary modeling tasks.
|
||||
"DL_POLY"_dlpoly
|
||||
"Tinker"_tinker :ul
|
||||
|
||||
:link(charmm,http://www.scripps.edu/brooks)
|
||||
:link(amber,http://amber.scripps.edu)
|
||||
:link(charmm,http://www.charmm.org)
|
||||
:link(amber,http://ambermd.org)
|
||||
:link(namd,http://www.ks.uiuc.edu/Research/namd/)
|
||||
:link(nwchem,http://www.emsl.pnl.gov/docs/nwchem/nwchem.html)
|
||||
:link(dlpoly,http://www.cse.clrc.ac.uk/msi/software/DL_POLY)
|
||||
:link(dlpoly,http://www.ccp5.ac.uk/DL_POLY_CLASSIC)
|
||||
:link(tinker,http://dasher.wustl.edu/tinker)
|
||||
|
||||
CHARMM, AMBER, NAMD, NWCHEM, and Tinker are designed primarily for
|
||||
|
||||
@ -71,16 +71,16 @@ Package, Description, Author(s), Doc page, Example, Library
|
||||
"COMPRESS"_#COMPRESS, I/O compression, Axel Kohlmeyer (Temple U), "dump */gz"_dump.html, -, -
|
||||
"CORESHELL"_#CORESHELL, adiabatic core/shell model, Hendrik Heenen (Technical U of Munich), "Section 6.6.25"_Section_howto.html#howto_25, coreshell, -
|
||||
"DIPOLE"_#DIPOLE, point dipole particles, -, "pair_style dipole/cut"_pair_dipole.html, dipole, -
|
||||
"GPU"_#GPU, GPU-enabled styles, Mike Brown (ORNL), "Section accelerate"_accelerate_gpu.html, gpu, lib/gpu
|
||||
"GPU"_#GPU, GPU-enabled styles, Mike Brown (ORNL), "Section 5.3.1"_accelerate_gpu.html, gpu, lib/gpu
|
||||
"GRANULAR"_#GRANULAR, granular systems, -, "Section 6.6.6"_Section_howto.html#howto_6, pour, -
|
||||
"KIM"_#KIM, openKIM potentials, Smirichinski & Elliot & Tadmor (3), "pair_style kim"_pair_kim.html, kim, KIM
|
||||
"KOKKOS"_#KOKKOS, Kokkos-enabled styles, Trott & Moore (4), "Section 5"_accelerate_kokkos.html, kokkos, lib/kokkos
|
||||
"KOKKOS"_#KOKKOS, Kokkos-enabled styles, Trott & Moore (4), "Section 5.3.3"_accelerate_kokkos.html, kokkos, lib/kokkos
|
||||
"KSPACE"_#KSPACE, long-range Coulombic solvers, -, "kspace_style"_kspace_style.html, peptide, -
|
||||
"MANYBODY"_#MANYBODY, many-body potentials, -, "pair_style tersoff"_pair_tersoff.html, shear, -
|
||||
"MEAM"_#MEAM, modified EAM potential, Greg Wagner (Sandia), "pair_style meam"_pair_meam.html, meam, lib/meam
|
||||
"MC"_#MC, Monte Carlo options, -, "fix gcmc"_fix_gcmc.html, -, -
|
||||
"MOLECULE"_#MOLECULE, molecular system force fields, -, "Section 6.6.3"_Section_howto.html#howto_3, peptide, -
|
||||
"OPT"_#OPT, optimized pair styles, Fischer & Richie & Natoli (2), "Section accelerate"_accelerate_opt.html, -, -
|
||||
"OPT"_#OPT, optimized pair styles, Fischer & Richie & Natoli (2), "Section 5.3.5"_accelerate_opt.html, -, -
|
||||
"PERI"_#PERI, Peridynamics models, Mike Parks (Sandia), "pair_style peri"_pair_peri.html, peri, -
|
||||
"POEMS"_#POEMS, coupled rigid body motion, Rudra Mukherjee (JPL), "fix poems"_fix_poems.html, rigid, lib/poems
|
||||
"PYTHON"_#PYTHON, embed Python code in an input script, -, "python"_python.html, python, lib/python
|
||||
@ -127,7 +127,6 @@ of the LAMMPS distribution. See the lib/package/README file for info
|
||||
on how to build the library. If it is not listed as lib/package, then
|
||||
it is a third-party library not included in the LAMMPS distribution.
|
||||
See details on all of this below for individual packages.
|
||||
p.s.: are we ever going to get commit messages from you? ;-)
|
||||
|
||||
:line
|
||||
|
||||
@ -150,7 +149,7 @@ make machine :pre
|
||||
|
||||
Make.py -p ^asphere -a machine :pre
|
||||
|
||||
Supporting info: "Section howto 6.14"_Section_howto.html#howto_14,
|
||||
Supporting info: "Section 6.14"_Section_howto.html#howto_14,
|
||||
"pair_style gayberne"_pair_gayberne.html, "pair_style
|
||||
resquared"_pair_resquared.html,
|
||||
"doc/PDF/pair_gayberne_extra.pdf"_PDF/pair_gayberne_extra.pdf,
|
||||
@ -183,7 +182,7 @@ Supporting info: "atom_style body"_atom_style.html, "body"_body.html,
|
||||
"pair_style body"_pair_body.html, examples/body
|
||||
|
||||
:line
|
||||
|
||||
|
||||
CLASS2 package :link(CLASS2),h5
|
||||
|
||||
Contents: Bond, angle, dihedral, improper, and pair styles for the
|
||||
@ -207,9 +206,9 @@ Supporting info: "bond_style class2"_bond_class2.html, "angle_style
|
||||
class2"_angle_class2.html, "dihedral_style
|
||||
class2"_dihedral_class2.html, "improper_style
|
||||
class2"_improper_class2.html, "pair_style lj/class2"_pair_class2.html
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
COLLOID package :link(COLLOID),h5
|
||||
|
||||
Contents: Support for coarse-grained colloidal particles. Wall fix
|
||||
@ -240,9 +239,9 @@ lubricate"_pair_lubricate.html, "pair_style
|
||||
lubricateU"_pair_lubricateU.html, examples/colloid, examples/srd
|
||||
|
||||
:line
|
||||
|
||||
|
||||
COMPRESS package :link(COMPRESS),h5
|
||||
|
||||
|
||||
Contents: Support for compressed output of dump files via the zlib
|
||||
compression library, using dump styles with a "gz" in their style
|
||||
name.
|
||||
@ -272,16 +271,15 @@ atom/gz"_dump.html, "dump cfg/gz"_dump.html, "dump
|
||||
custom/gz"_dump.html, "dump xyz/gz"_dump.html
|
||||
|
||||
:line
|
||||
|
||||
|
||||
CORESHELL package :link(CORESHELL),h5
|
||||
|
||||
Contents: Compute and pair styles that implement the adiabatic
|
||||
core/shell model for polarizability. The compute temp/cs command
|
||||
measures the temperature of a system with core/shell particles. The
|
||||
pair styles augment Born, Buckingham, and Lennard-Jones styles with
|
||||
core/shell capabilities. See "Section howto
|
||||
6.26"_Section_howto.html#howto_26 for an overview of how to use the
|
||||
package.
|
||||
core/shell capabilities. See "Section 6.26"_Section_howto.html#howto_26
|
||||
for an overview of how to use the package.
|
||||
|
||||
To install via make or Make.py:
|
||||
|
||||
@ -297,14 +295,14 @@ make machine :pre
|
||||
|
||||
Make.py -p ^coreshell -a machine :pre
|
||||
|
||||
Supporting info: "Section howto
|
||||
6.26"_Section_howto.html#howto_26, "compute temp/cs"_compute_temp_cs.html,
|
||||
Supporting info: "Section 6.26"_Section_howto.html#howto_26,
|
||||
"compute temp/cs"_compute_temp_cs.html,
|
||||
"pair_style born/coul/long/cs"_pair_cs.html, "pair_style
|
||||
buck/coul/long/cs"_pair_cs.html, pair_style
|
||||
lj/cut/coul/long/cs"_pair_lj.html, examples/coreshell
|
||||
|
||||
:line
|
||||
|
||||
|
||||
DIPOLE package :link(DIPOLE),h5
|
||||
|
||||
Contents: An atom style and several pair styles to support point
|
||||
@ -328,14 +326,14 @@ Supporting info: "atom_style dipole"_atom_style.html, "pair_style
|
||||
lj/cut/dipole/cut"_pair_dipole.html, "pair_style
|
||||
lj/cut/dipole/long"_pair_dipole.html, "pair_style
|
||||
lj/long/dipole/long"_pair_dipole.html, examples/dipole
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
GPU package :link(GPU),h5
|
||||
|
||||
Contents: Dozens of pair styles and a version of the PPPM long-range
|
||||
Coulombic solver for NVIDIA GPUs. All of them have a "gpu" in their
|
||||
style name. "Section accelerate gpu"_accelerate_gpu.html gives
|
||||
style name. "Section 5.3.1"_accelerate_gpu.html gives
|
||||
details of what hardware and Cuda software is required on your system,
|
||||
and how to build and use this package. See the KOKKOS package, which
|
||||
also has GPU-enabled styles.
|
||||
@ -380,15 +378,16 @@ make machine :pre
|
||||
|
||||
Make.py -p ^gpu -a machine :pre
|
||||
|
||||
Supporting info: src/GPU/README, lib/gpu/README, "Section
|
||||
acclerate"_Section_accelerate.html, "Section accelerate
|
||||
gpu"_accelerate_gpu.html, Pair Styles section of "Section commands
|
||||
3.5"_Section_commands.html#cmd_5 for any pair style listed with a (g),
|
||||
Supporting info: src/GPU/README, lib/gpu/README,
|
||||
"Section 5.3"_Section_accelerate.html#acc_3,
|
||||
"Section 5.3.1"_accelerate_gpu.html,
|
||||
Pair Styles section of "Section 3.5"_Section_commands.html#cmd_5
|
||||
for any pair style listed with a (g),
|
||||
"kspace_style"_kspace_style.html, "package gpu"_package.html,
|
||||
examples/accelerate, bench/FERMI, bench/KEPLER
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
GRANULAR package :link(GRANULAR),h5
|
||||
|
||||
Contents: Fixes and pair styles that support models of finite-size
|
||||
@ -409,13 +408,13 @@ make machine :pre
|
||||
|
||||
Make.py -p ^granular -a machine :pre
|
||||
|
||||
Supporting info: "Section howto 6.6"_Section_howto.html#howto_6, "fix
|
||||
Supporting info: "Section 6.6"_Section_howto.html#howto_6, "fix
|
||||
pour"_fix_pour.html, "fix wall/gran"_fix_wall_gran.html, "pair_style
|
||||
gran/hooke"_pair_gran.html, "pair_style
|
||||
gran/hertz/history"_pair_gran.html, examples/pour, bench/in.chute
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
KIM package :link(KIM),h5
|
||||
|
||||
Contents: A pair style that interfaces to the Knowledge Base for
|
||||
@ -444,16 +443,16 @@ Make.py -p ^kim -a machine :pre
|
||||
|
||||
Supporting info: src/KIM/README, lib/kim/README, "pair_style
|
||||
kim"_pair_kim.html, examples/kim
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
KOKKOS package :link(KOKKOS),h5
|
||||
|
||||
Contents: Dozens of atom, pair, bond, angle, dihedral, improper styles
|
||||
which run with the Kokkos library to provide optimization for
|
||||
multicore CPUs (via OpenMP), NVIDIA GPUs, or the Intel Xeon Phi (in
|
||||
native mode). All of them have a "kk" in their style name. "Section
|
||||
accelerate kokkos"_accelerate_kokkos.html gives details of what
|
||||
5.3.3"_accelerate_kokkos.html gives details of what
|
||||
hardware and software is required on your system, and how to build and
|
||||
use this package. See the GPU, OPT, USER-INTEL, USER-OMP packages,
|
||||
which also provide optimizations for the same range of hardware.
|
||||
@ -473,9 +472,8 @@ the KOKKOS_ARCH setting in Makefile.kokkos_cuda), Or, as illustrated
|
||||
below, you can use the Make.py script with its "-kokkos" option to
|
||||
choose which hardware to build for. Type "python src/Make.py -h
|
||||
-kokkos" to see the details. If these methods do not work on your
|
||||
system, you will need to read the "Section accelerate
|
||||
kokkos"_accelerate_kokkos.html doc page for details of what
|
||||
Makefile.machine settings are needed.
|
||||
system, you will need to read the "Section 5.3.3"_accelerate_kokkos.html
|
||||
doc page for details of what Makefile.machine settings are needed.
|
||||
|
||||
To install via make or Make.py for each of 3 hardware options:
|
||||
|
||||
@ -495,15 +493,15 @@ make machine :pre
|
||||
|
||||
Make.py -p ^kokkos -a machine :pre
|
||||
|
||||
Supporting info: src/KOKKOS/README, lib/kokkos/README, "Section
|
||||
acclerate"_Section_accelerate.html, "Section accelerate
|
||||
kokkos"_accelerate_kokkos.html, Pair Styles section of "Section
|
||||
commands 3.5"_Section_commands.html#cmd_5 for any pair style listed
|
||||
with a (k), "package kokkos"_package.html,
|
||||
Supporting info: src/KOKKOS/README, lib/kokkos/README,
|
||||
"Section 5.3"_Section_accelerate.html#acc_3,
|
||||
"Section 5.3.3"_accelerate_kokkos.html,
|
||||
Pair Styles section of "Section 3.5"_Section_commands.html#cmd_5
|
||||
for any pair style listed with a (k), "package kokkos"_package.html,
|
||||
examples/accelerate, bench/FERMI, bench/KEPLER
|
||||
|
||||
:line
|
||||
|
||||
|
||||
KSPACE package :link(KSPACE),h5
|
||||
|
||||
Contents: A variety of long-range Coulombic solvers, and pair styles
|
||||
@ -514,7 +512,7 @@ particle-mesh (PPPM), and multilevel summation method (MSM) solvers.
|
||||
Building with the KSPACE package requires a 1d FFT library be present
|
||||
on your system for use by the PPPM solvers. This can be the KISS FFT
|
||||
library provided with LAMMPS, or 3rd party libraries like FFTW or a
|
||||
vendor-supplied FFT library. See step 6 of "Section start
|
||||
vendor-supplied FFT library. See step 6 of "Section
|
||||
2.2.2"_Section_start.html#start_2_2 of the manual for details of how
|
||||
to select different FFT options in your machine Makefile. The Make.py
|
||||
tool has an "-fft" option which can insert these settings into your
|
||||
@ -536,15 +534,16 @@ make machine :pre
|
||||
Make.py -p ^kspace -a machine :pre
|
||||
|
||||
Supporting info: "kspace_style"_kspace_style.html,
|
||||
"doc/PDF/kspace.pdf"_PDF/kspace.pdf, "Section howto
|
||||
6.7"_Section_howto.html#howto_7, "Section howto
|
||||
6.8"_Section_howto.html#howto_8, "Section howto
|
||||
6.9"_Section_howto.html#howto_9, "pair_style coul"_pair_coul.html,
|
||||
other pair style command doc pages which have "long" or "msm" in their
|
||||
style name, examples/peptide, bench/in.rhodo
|
||||
"doc/PDF/kspace.pdf"_PDF/kspace.pdf,
|
||||
"Section 6.7"_Section_howto.html#howto_7,
|
||||
"Section 6.8"_Section_howto.html#howto_8,
|
||||
"Section 6.9"_Section_howto.html#howto_9,
|
||||
"pair_style coul"_pair_coul.html, other pair style command doc pages
|
||||
which have "long" or "msm" in their style name,
|
||||
examples/peptide, bench/in.rhodo
|
||||
|
||||
:line
|
||||
|
||||
|
||||
MANYBODY package :link(MANYBODY),h5
|
||||
|
||||
Contents: A variety of many-body and bond-order potentials. These
|
||||
@ -566,14 +565,14 @@ make machine :pre
|
||||
|
||||
Make.py -p ^manybody -a machine :pre
|
||||
|
||||
Supporting info:
|
||||
|
||||
Examples: Pair Styles section of "Section commands
|
||||
Supporting info:
|
||||
|
||||
Examples: Pair Styles section of "Section
|
||||
3.5"_Section_commands.html#cmd_5, examples/comb, examples/eim,
|
||||
examples/nb3d, examples/vashishta
|
||||
|
||||
:line
|
||||
|
||||
|
||||
MC package :link(MC),h5
|
||||
|
||||
Contents: Several fixes and a pair style that have Monte Carlo (MC) or
|
||||
@ -599,9 +598,9 @@ Supporting info: "fix atom/swap"_fix_atom_swap.html, "fix
|
||||
bond/break"_fix_bond_break.html, "fix
|
||||
bond/create"_fix_bond_create.html, "fix bond/swap"_fix_bond_swap.html,
|
||||
"fix gcmc"_fix_gcmc.html, "pair_style dsmc"_pair_dsmc.html
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
MEAM package :link(MEAM),h5
|
||||
|
||||
Contents: A pair style for the modified embedded atom (MEAM)
|
||||
@ -645,9 +644,9 @@ Make.py -p ^meam -a machine :pre
|
||||
|
||||
Supporting info: lib/meam/README, "pair_style meam"_pair_meam.html,
|
||||
examples/meam
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
MISC package :link(MISC),h5
|
||||
|
||||
Contents: A variety of computes, fixes, and pair styles that are not
|
||||
@ -671,9 +670,9 @@ Make.py -p ^misc -a machine :pre
|
||||
Supporting info: "compute ti"_compute_ti.html, "fix
|
||||
evaporate"_fix_evaporate.html, "fix tmm"_fix_ttm.html, "fix
|
||||
viscosity"_fix_viscosity.html, examples/misc
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
MOLECULE package :link(MOLECULE),h5
|
||||
|
||||
Contents: A large number of atom, pair, bond, angle, dihedral,
|
||||
@ -700,12 +699,12 @@ Supporting info:"atom_style"_atom_style.html,
|
||||
"dihedral_style"_dihedral_style.html,
|
||||
"improper_style"_improper_style.html, "pair_style
|
||||
hbond/dreiding/lj"_pair_hbond_dreiding.html, "pair_style
|
||||
lj/charmm/coul/charmm"_pair_charmm.html, "Section howto
|
||||
6.3"_Section_howto.html#howto_3, examples/micelle, examples/peptide,
|
||||
bench/in.chain, bench/in.rhodo
|
||||
lj/charmm/coul/charmm"_pair_charmm.html,
|
||||
"Section 6.3"_Section_howto.html#howto_3,
|
||||
examples/micelle, examples/peptide, bench/in.chain, bench/in.rhodo
|
||||
|
||||
:line
|
||||
|
||||
|
||||
MPIIO package :link(MPIIO),h5
|
||||
|
||||
Contents: Support for parallel output/input of dump and restart files
|
||||
@ -730,15 +729,15 @@ Make.py -p ^mpiio -a machine :pre
|
||||
|
||||
Supporting info: "dump"_dump.html, "restart"_restart.html,
|
||||
"write_restart"_write_restart.html, "read_restart"_read_restart.html
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
OPT package :link(OPT),h5
|
||||
|
||||
Contents: A handful of pair styles with an "opt" in their style name
|
||||
which are optimized for improved CPU performance on single or multiple
|
||||
cores. These include EAM, LJ, CHARMM, and Morse potentials. "Section
|
||||
accelerate opt"_accelerate_opt.html gives details of how to build and
|
||||
5.3.5"_accelerate_opt.html gives details of how to build and
|
||||
use this package. See the KOKKOS, USER-INTEL, and USER-OMP packages,
|
||||
which also have styles optimized for CPU performance.
|
||||
|
||||
@ -763,13 +762,13 @@ make machine :pre
|
||||
|
||||
Make.py -p ^opt -a machine :pre
|
||||
|
||||
Supporting info: "Section acclerate"_Section_accelerate.html, "Section
|
||||
accelerate opt"_accelerate_opt.html, Pair Styles section of "Section
|
||||
commands 3.5"_Section_commands.html#cmd_5 for any pair style listed
|
||||
with an (o), examples/accelerate, bench/KEPLER
|
||||
Supporting info: "Section 5.3"_Section_accelerate.html#acc_3,
|
||||
"Section 5.3.5"_accelerate_opt.html, Pair Styles section of
|
||||
"Section 3.5"_Section_commands.html#cmd_5 for any pair style
|
||||
listed with an (t), examples/accelerate, bench/KEPLER
|
||||
|
||||
:line
|
||||
|
||||
|
||||
PERI package :link(PERI),h5
|
||||
|
||||
Contents: Support for the Peridynamics method, a particle-based
|
||||
@ -797,9 +796,9 @@ Supporting info:
|
||||
"doc/PDF/PDLammps_VES.pdf"_PDF/PDLammps_VES.pdf, "atom_style
|
||||
peri"_atom_style.html, "compute damage/atom"_compute_damage_atom.html,
|
||||
"pair_style peri/pmb"_pair_peri.html, examples/peri
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
POEMS package :link(POEMS),h5
|
||||
|
||||
Contents: A fix that wraps the Parallelizable Open source Efficient
|
||||
@ -840,19 +839,19 @@ Supporting info: src/POEMS/README, lib/poems/README,
|
||||
"fix poems"_fix_poems.html, examples/rigid
|
||||
|
||||
:line
|
||||
|
||||
|
||||
PYTHON package :link(PYTHON),h5
|
||||
|
||||
Contents: A "python"_python.html command which allow you to execute
|
||||
Python code from a LAMMPS input script. The code can be in a separate
|
||||
file or embedded in the input script itself. See "Section python
|
||||
11.2"_Section_python.html" for an overview of using Python from
|
||||
file or embedded in the input script itself. See "Section
|
||||
11.2"_Section_python.html#py_2 for an overview of using Python from
|
||||
LAMMPS and for other ways to use LAMMPS and Python together.
|
||||
|
||||
Building with the PYTHON package assumes you have a Python shared
|
||||
library available on your system, which needs to be a Python 2
|
||||
version, 2.6 or later. Python 3 is not supported. The build uses the
|
||||
contents of the lib/python/Makefile.lammps file to find all the Python
|
||||
version, 2.6 or later. Python 3 is not yet supported. The build uses
|
||||
the contents of the lib/python/Makefile.lammps file to find all the Python
|
||||
files required in the build/link process. See the lib/python/README
|
||||
file if the settings in that file do not work on your system. Note
|
||||
that the Make.py script has a "-python" option to allow an alternate
|
||||
@ -874,9 +873,9 @@ make machine :pre
|
||||
Make.py -p ^python -a machine :pre
|
||||
|
||||
Supporting info: examples/python
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
QEQ package :link(QEQ),h5
|
||||
|
||||
Contents: Several fixes for performing charge equilibration (QEq) via
|
||||
@ -898,9 +897,9 @@ make machine :pre
|
||||
Make.py -p ^qeq -a machine :pre
|
||||
|
||||
Supporting info: "fix qeq/*"_fix_qeq.html, examples/qeq
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
REAX package :link(REAX),h5
|
||||
|
||||
Contents: A pair style for the ReaxFF potential, a universal reactive
|
||||
@ -942,15 +941,15 @@ Make.py -p ^reax -a machine :pre
|
||||
|
||||
Supporting info: lib/reax/README, "pair_style reax"_pair_reax.html,
|
||||
"fix reax/bonds"_fix_reax_bonds.html, examples/reax
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
REPLICA package :link(REPLICA),h5
|
||||
|
||||
Contents: A collection of multi-replica methods that are used by
|
||||
invoking multiple instances (replicas) of LAMMPS
|
||||
simulations. Communication between individual replicas is performed in
|
||||
different ways by the different methods. See "Section howto
|
||||
different ways by the different methods. See "Section
|
||||
6.5"_Section_howto.html#howto_5 for an overview of how to run
|
||||
multi-replica simulations in LAMMPS. Multi-replica methods included
|
||||
in the package are nudged elastic band (NEB), parallel replica
|
||||
@ -973,13 +972,13 @@ make machine :pre
|
||||
|
||||
Make.py -p ^replica -a machine :pre
|
||||
|
||||
Supporting info: "Section howto 6.5"_Section_howto.html#howto_5,
|
||||
Supporting info: "Section 6.5"_Section_howto.html#howto_5,
|
||||
"neb"_neb.html, "prd"_prd.html, "tad"_tad.html, "temper"_temper.html,
|
||||
"run_style verlet/split"_run_style.html, examples/neb, examples/prd,
|
||||
examples/tad
|
||||
|
||||
:line
|
||||
|
||||
|
||||
RIGID package :link(RIGID),h5
|
||||
|
||||
Contents: A collection of computes and fixes which enforce rigid
|
||||
@ -1006,7 +1005,7 @@ Supporting info: "compute erotate/rigid"_compute_erotate_rigid.html,
|
||||
rigid/*"_fix_rigid.html, examples/ASPHERE, examples/rigid
|
||||
|
||||
:line
|
||||
|
||||
|
||||
SHOCK package :link(SHOCK),h5
|
||||
|
||||
Contents: A small number of fixes useful for running impact
|
||||
@ -1029,15 +1028,15 @@ Make.py -p ^shock -a machine :pre
|
||||
Supporting info: "fix append/atoms"_fix_append_atoms.html, "fix
|
||||
msst"_fix_msst.html, "fix nphug"_fix_nphug.html, "fix
|
||||
wall/piston"_fix_wall_piston.html, examples/hugoniostat, examples/msst
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
SNAP package :link(SNAP),h5
|
||||
|
||||
Contents: A pair style for the spectral neighbor analysis potential
|
||||
(SNAP), which is an empirical potential which can be quantum accurate
|
||||
when fit to an archive of DFT data. Computes useful for analyzing
|
||||
properties of the potential are also included.
|
||||
when fit to an archive of DFT data. Computes useful for analyzing
|
||||
properties of the potential are also included.
|
||||
|
||||
To install via make or Make.py:
|
||||
|
||||
@ -1056,9 +1055,9 @@ Make.py -p ^snap -a machine :pre
|
||||
Supporting info: "pair snap"_pair_snap.html, "compute
|
||||
sna/atom"_compute_sna_atom.html, "compute snad/atom"_compute_sna_atom.html,
|
||||
"compute snav/atom"_compute_sna_atom.html, examples/snap
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
SRD package :link(SRD),h5
|
||||
|
||||
Contents: Two fixes which implement the Stochastic Rotation Dynamics
|
||||
@ -1081,9 +1080,9 @@ Make.py -p ^srd -a machine :pre
|
||||
|
||||
Supporting info: "fix srd"_fix_srd.html, "fix
|
||||
wall/srd"_fix_wall_srd.html, examples/srd, examples/ASPHERE
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
VORONOI package :link(VORONOI),h5
|
||||
|
||||
Contents: A "compute voronoi/atom"_compute_voronoi_atom.html command
|
||||
@ -1130,9 +1129,9 @@ Make.py -p ^voronoi -a machine :pre
|
||||
|
||||
Supporting info: src/VORONOI/README, lib/voronoi/README, "compute
|
||||
voronoi/atom"_compute_voronoi_atom.html, examples/voronoi
|
||||
|
||||
|
||||
:line
|
||||
|
||||
|
||||
4.2 User packages :h4,link(pkg_2)
|
||||
|
||||
The current list of user-contributed packages is as follows:
|
||||
@ -1148,13 +1147,14 @@ Package, Description, Author(s), Doc page, Example, Pic/movie, Library
|
||||
"USER-EFF"_#USER-EFF, electron force field, Andres Jaramillo-Botero (Caltech), "pair_style eff/cut"_pair_eff.html, USER/eff, "eff"_eff, -
|
||||
"USER-FEP"_#USER-FEP, free energy perturbation, Agilio Padua (U Blaise Pascal Clermont-Ferrand), "compute fep"_compute_fep.html, USER/fep, -, -
|
||||
"USER-H5MD"_#USER-H5MD, dump output via HDF5, Pierre de Buyl (KU Leuven), "dump h5md"_dump_h5md.html, -, -, lib/h5md
|
||||
"USER-INTEL"_#USER-INTEL, Vectorized CPU and Intel(R) coprocessor styles, W. Michael Brown (Intel), "Section accelerate"_accelerate_intel.html, examples/intel, -, -
|
||||
"USER-INTEL"_#USER-INTEL, Vectorized CPU and Intel(R) coprocessor styles, W. Michael Brown (Intel), "Section 5.3.2"_accelerate_intel.html, examples/intel, -, -
|
||||
"USER-LB"_#USER-LB, Lattice Boltzmann fluid, Colin Denniston (U Western Ontario), "fix lb/fluid"_fix_lb_fluid.html, USER/lb, -, -
|
||||
"USER-MGPT"_#USER-MGPT, fast MGPT multi-ion potentials, Tomas Oppelstrup & John Moriarty (LLNL), "pair_style mgpt"_pair_mgpt.html, USER/mgpt, -, -
|
||||
"USER-MISC"_#USER-MISC, single-file contributions, USER-MISC/README, USER-MISC/README, -, -, -
|
||||
"USER-MANIFOLD"_#USER-MANIFOLD, motion on 2d surface, Stefan Paquay (Eindhoven U of Technology), "fix manifoldforce"_fix_manifoldforce.html, USER/manifold, "manifold"_manifold, -
|
||||
"USER-MOLFILE"_#USER-MOLFILE, "VMD"_VMD molfile plug-ins, Axel Kohlmeyer (Temple U), "dump molfile"_dump_molfile.html, -, -, VMD-MOLFILE
|
||||
"USER-OMP"_#USER-OMP, OpenMP threaded styles, Axel Kohlmeyer (Temple U), "Section accelerate"_accelerate_omp.html, -, -, -
|
||||
"USER-NC-DUMP"_#USER-NC-DUMP, dump output via NetCDF, Lars Pastewka (Karlsruhe Institute of Technology, KIT), "dump nc, dump nc/mpiio"_dump_nc.html, -, -, lib/netcdf
|
||||
"USER-OMP"_#USER-OMP, OpenMP threaded styles, Axel Kohlmeyer (Temple U), "Section 5.3.4"_accelerate_omp.html, -, -, -
|
||||
"USER-PHONON"_#USER-PHONON, phonon dynamical matrix, Ling-Ti Kong (Shanghai Jiao Tong U), "fix phonon"_fix_phonon.html, USER/phonon, -, -
|
||||
"USER-QMMM"_#USER-QMMM, QM/MM coupling, Axel Kohlmeyer (Temple U), "fix qmmm"_fix_qmmm.html, USER/qmmm, -, lib/qmmm
|
||||
"USER-QTB"_#USER-QTB, quantum nuclear effects, Yuan Shen (Stanford), "fix qtb"_fix_qtb.html "fix qbmsst"_fix_qbmsst.html, qtb, -, -
|
||||
@ -1303,7 +1303,7 @@ fix. The COLVARS library itself is written and maintained by Giacomo
|
||||
Fiorin (ICMS, Temple University, Philadelphia, PA, USA) and Jerome
|
||||
Henin (LISM, CNRS, Marseille, France). Contact them directly if you
|
||||
have questions.
|
||||
|
||||
|
||||
:line
|
||||
|
||||
USER-DIFFRACTION package :link(USER-DIFFRACTION),h5
|
||||
@ -1353,12 +1353,12 @@ USER-DRUDE package :link(USER-DRUDE),h5
|
||||
|
||||
Contents: This package contains methods for simulating polarizable
|
||||
systems using thermalized Drude oscillators. It has computes, fixes,
|
||||
and pair styles for this purpose. See "Section howto
|
||||
and pair styles for this purpose. See "Section
|
||||
6.27"_Section_howto.html#howto_27 for an overview of how to use the
|
||||
package. See src/USER-DRUDE/README for additional details. There are
|
||||
auxiliary tools for using this package in tools/drude.
|
||||
|
||||
Supporting info: "Section howto 6.27"_Section_howto.html#howto_27,
|
||||
Supporting info: "Section 6.27"_Section_howto.html#howto_27,
|
||||
src/USER-DRUDE/README, "fix drude"_fix_drude.html, "fix
|
||||
drude/transform/*"_fix_drude_transform.html, "compute
|
||||
temp/drude"_compute_temp_drude.html, "pair thole"_pair_thole.html,
|
||||
@ -1381,7 +1381,7 @@ in 2007. See src/USER-EFF/README for more details. There are
|
||||
auxiliary tools for using this package in tools/eff; see its README
|
||||
file.
|
||||
|
||||
Supporting info:
|
||||
Supporting info:
|
||||
|
||||
Author: Andres Jaramillo-Botero at CalTech (ajaramil at
|
||||
wag.caltech.edu). Contact him directly if you have questions.
|
||||
@ -1432,7 +1432,7 @@ USER-INTEL package :link(USER-INTEL),h5
|
||||
Contents: Dozens of pair, bond, angle, dihedral, and improper styles
|
||||
that are optimized for Intel CPUs and the Intel Xeon Phi (in offload
|
||||
mode). All of them have an "intel" in their style name. "Section
|
||||
accelerate intel"_accelerate_intel.html gives details of what hardware
|
||||
5.3.2"_accelerate_intel.html gives details of what hardware
|
||||
and compilers are required on your system, and how to build and use
|
||||
this package. Also see src/USER-INTEL/README for more details. See
|
||||
the KOKKOS, OPT, and USER-OMP packages, which also have CPU and
|
||||
@ -1440,7 +1440,7 @@ Phi-enabled styles.
|
||||
|
||||
Supporting info: examples/accelerate, src/USER-INTEL/TEST
|
||||
|
||||
"Section 5"_Section_accelerate.html#acc_3
|
||||
"Section 5.3"_Section_accelerate.html#acc_3
|
||||
|
||||
Author: Mike Brown at Intel (michael.w.brown at intel.com). Contact
|
||||
him directly if you have questions.
|
||||
@ -1457,21 +1457,21 @@ LINKFLAGS: add -fopenmp :ul
|
||||
|
||||
For Phi mode add the following in addition to the CPU mode flags:
|
||||
|
||||
CCFLAGS: add -DLMP_INTEL_OFFLOAD and
|
||||
CCFLAGS: add -DLMP_INTEL_OFFLOAD and
|
||||
LINKFLAGS: add -offload :ul
|
||||
|
||||
And also add this to CCFLAGS:
|
||||
|
||||
-offload-option,mic,compiler,"-fp-model fast=2 -mGLOB_default_function_attrs=\"gather_scatter_loop_unroll=4\"" :pre
|
||||
|
||||
Examples:
|
||||
Examples:
|
||||
|
||||
:line
|
||||
|
||||
USER-LB package :link(USER-LB),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package contains a LAMMPS implementation of a background
|
||||
Lattice-Boltzmann fluid, which can be used to model MD particles
|
||||
influenced by hydrodynamic forces.
|
||||
@ -1490,8 +1490,8 @@ Examples: examples/USER/lb
|
||||
|
||||
USER-MGPT package :link(USER-MGPT),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package contains a fast implementation for LAMMPS of
|
||||
quantum-based MGPT multi-ion potentials. The MGPT or model GPT method
|
||||
derives from first-principles DFT-based generalized pseudopotential
|
||||
@ -1522,8 +1522,8 @@ Examples: examples/USER/mgpt
|
||||
|
||||
USER-MISC package :link(USER-MISC),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
The files in this package are a potpourri of (mostly) unrelated
|
||||
features contributed to LAMMPS by users. Each feature is a single
|
||||
pair of files (*.cpp and *.h).
|
||||
@ -1532,7 +1532,7 @@ More information about each feature can be found by reading its doc
|
||||
page in the LAMMPS doc directory. The doc page which lists all LAMMPS
|
||||
input script commands is as follows:
|
||||
|
||||
"Section 3"_Section_commands.html#cmd_5
|
||||
"Section 3.5"_Section_commands.html#cmd_5
|
||||
|
||||
User-contributed features are listed at the bottom of the fix,
|
||||
compute, pair, etc sections.
|
||||
@ -1549,8 +1549,8 @@ Examples: examples/USER/misc
|
||||
|
||||
USER-MANIFOLD package :link(USER-MANIFOLD),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package contains a dump molfile command which uses molfile
|
||||
plugins that are bundled with the
|
||||
"VMD"_http://www.ks.uiuc.edu/Research/vmd molecular visualization and
|
||||
@ -1575,8 +1575,8 @@ Contact him directly if you have questions.
|
||||
|
||||
USER-MOLFILE package :link(USER-MOLFILE),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package contains a dump molfile command which uses molfile
|
||||
plugins that are bundled with the
|
||||
"VMD"_http://www.ks.uiuc.edu/Research/vmd molecular visualization and
|
||||
@ -1599,17 +1599,40 @@ The person who created this package is Axel Kohlmeyer at Temple U
|
||||
|
||||
:line
|
||||
|
||||
USER-NC-DUMP package :link(USER-NC-DUMP),h5
|
||||
|
||||
Contents: Dump styles for writing NetCDF format files. NetCDF is a binary,
|
||||
portable, self-describing file format on top of HDF5. The file format
|
||||
contents follow the AMBER NetCDF trajectory conventions
|
||||
(http://ambermd.org/netcdf/nctraj.xhtml), but include extensions to this
|
||||
convention. This package implements a "dump nc"_dump_nc.html command
|
||||
and a "dump nc/mpiio"_dump_nc.html command to output LAMMPS snapshots
|
||||
in this format. See src/USER-NC-DUMP/README for more details.
|
||||
|
||||
NetCDF files can be directly visualized with the following tools:
|
||||
Ovito (http://www.ovito.org/). Ovito supports the AMBER convention
|
||||
and all of the above extensions. :ulb,l
|
||||
VMD (http://www.ks.uiuc.edu/Research/vmd/) :l
|
||||
AtomEye (http://www.libatoms.org/). The libAtoms version of AtomEye contains
|
||||
a NetCDF reader that is not present in the standard distribution of AtomEye :l,ule
|
||||
|
||||
The person who created these files is Lars Pastewka at
|
||||
Karlsruhe Institute of Technology (lars.pastewka at kit.edu).
|
||||
Contact him directly if you have questions.
|
||||
|
||||
:line
|
||||
|
||||
USER-OMP package :link(USER-OMP),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package provides OpenMP multi-threading support and
|
||||
other optimizations of various LAMMPS pair styles, dihedral
|
||||
styles, and fix styles.
|
||||
|
||||
|
||||
See this section of the manual to get started:
|
||||
|
||||
"Section 5"_Section_accelerate.html#acc_3
|
||||
"Section 5.3"_Section_accelerate.html#acc_3
|
||||
|
||||
The person who created this package is Axel Kohlmeyer at Temple U
|
||||
(akohlmey at gmail.com). Contact him directly if you have questions.
|
||||
@ -1644,8 +1667,8 @@ Examples: examples/USER/phonon
|
||||
|
||||
USER-QMMM package :link(USER-QMMM),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package provides a fix qmmm command which allows LAMMPS to be
|
||||
used in a QM/MM simulation, currently only in combination with pw.x
|
||||
code from the "Quantum ESPRESSO"_espresso package.
|
||||
@ -1668,11 +1691,11 @@ The person who created this package is Axel Kohlmeyer at Temple U
|
||||
(akohlmey at gmail.com). Contact him directly if you have questions.
|
||||
|
||||
:line
|
||||
|
||||
|
||||
USER-QTB package :link(USER-QTB),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package provides a self-consistent quantum treatment of the
|
||||
vibrational modes in a classical molecular dynamics simulation. By
|
||||
coupling the MD simulation to a colored thermostat, it introduces zero
|
||||
@ -1702,16 +1725,16 @@ Examples: examples/USER/qtb
|
||||
|
||||
USER-QUIP package :link(USER-QUIP),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
Examples: examples/USER/quip
|
||||
|
||||
:line
|
||||
|
||||
USER-REAXC package :link(USER-REAXC),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package contains a implementation for LAMMPS of the ReaxFF force
|
||||
field. ReaxFF uses distance-dependent bond-order functions to
|
||||
represent the contributions of chemical bonding to the potential
|
||||
@ -1749,24 +1772,24 @@ Examples: examples/reax
|
||||
|
||||
USER-SMD package :link(USER-SMD),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package implements smoothed Mach dynamics (SMD) in
|
||||
LAMMPS. Currently, the package has the following features:
|
||||
|
||||
* Does liquids via traditional Smooth Particle Hydrodynamics (SPH)
|
||||
|
||||
* Also solves solids mechanics problems via a state of the art
|
||||
* Also solves solids mechanics problems via a state of the art
|
||||
stabilized meshless method with hourglass control.
|
||||
|
||||
* Can specify hydrostatic interactions independently from material
|
||||
* Can specify hydrostatic interactions independently from material
|
||||
strength models, i.e. pressure and deviatoric stresses are separated.
|
||||
|
||||
* Many material models available (Johnson-Cook, plasticity with
|
||||
hardening, Mie-Grueneisen, Polynomial EOS). Easy to add new
|
||||
* Many material models available (Johnson-Cook, plasticity with
|
||||
hardening, Mie-Grueneisen, Polynomial EOS). Easy to add new
|
||||
material models.
|
||||
|
||||
* Rigid boundary conditions (walls) can be loaded as surface geometries
|
||||
* Rigid boundary conditions (walls) can be loaded as surface geometries
|
||||
from *.STL files.
|
||||
|
||||
See the file doc/PDF/SMD_LAMMPS_userguide.pdf to get started.
|
||||
@ -1784,8 +1807,8 @@ Examples: examples/USER/smd
|
||||
|
||||
USER-SMTBQ package :link(USER-SMTBQ),h5
|
||||
|
||||
Supporting info:
|
||||
|
||||
Supporting info:
|
||||
|
||||
This package implements the Second Moment Tight Binding - QEq (SMTB-Q)
|
||||
potential for the description of ionocovalent bonds in oxides.
|
||||
|
||||
@ -1807,22 +1830,22 @@ Examples: examples/USER/smtbq
|
||||
|
||||
USER-SPH package :link(USER-SPH),h5
|
||||
|
||||
Supporting info:
|
||||
Supporting info:
|
||||
|
||||
This package implements smoothed particle hydrodynamics (SPH) in
|
||||
LAMMPS. Currently, the package has the following features:
|
||||
|
||||
* Tait, ideal gas, Lennard-Jones equation of states, full support for
|
||||
* Tait, ideal gas, Lennard-Jones equation of states, full support for
|
||||
complete (i.e. internal-energy dependent) equations of state
|
||||
|
||||
* Plain or Monaghans XSPH integration of the equations of motion
|
||||
|
||||
* Density continuity or density summation to propagate the density field
|
||||
|
||||
* Commands to set internal energy and density of particles from the
|
||||
* Commands to set internal energy and density of particles from the
|
||||
input script
|
||||
|
||||
* Output commands to access internal energy and density for dumping and
|
||||
* Output commands to access internal energy and density for dumping and
|
||||
thermo output
|
||||
|
||||
See the file doc/PDF/SPH_LAMMPS_userguide.pdf to get started.
|
||||
@ -1840,7 +1863,7 @@ Examples: examples/USER/sph
|
||||
|
||||
USER-TALLY package :link(USER-TALLY),h5
|
||||
|
||||
Supporting info:
|
||||
Supporting info:
|
||||
|
||||
Examples: examples/USER/tally
|
||||
|
||||
|
||||
@ -51,7 +51,7 @@ of these 5 problems on 1 or 4 cores of Linux desktop. The bench/FERMI
|
||||
and bench/KEPLER dirs have input files and scripts and instructions
|
||||
for running the same (or similar) problems using OpenMP or GPU or Xeon
|
||||
Phi acceleration options. See the README files in those dirs and the
|
||||
"Section accelerate"_Section_accelerate.html doc pages for
|
||||
"Section 5.3"_Section_accelerate.html#acc_3 doc pages for
|
||||
instructions on how to build LAMMPS and run on that kind of hardware.
|
||||
|
||||
The bench/POTENTIALS directory has input files which correspond to the
|
||||
|
||||
@ -8,28 +8,36 @@
|
||||
|
||||
11. Python interface to LAMMPS :h3
|
||||
|
||||
LAMMPS can work together with Python in two ways. First, Python can
|
||||
LAMMPS can work together with Python in three ways. First, Python can
|
||||
wrap LAMMPS through the "LAMMPS library
|
||||
interface"_Section_howto.html#howto_19, so that a Python script can
|
||||
create one or more instances of LAMMPS and launch one or more
|
||||
simulations. In Python lingo, this is "extending" Python with LAMMPS.
|
||||
|
||||
Second, LAMMPS can use the Python interpreter, so that a LAMMPS input
|
||||
Second, the low-level Python interface can be used indirectly through the
|
||||
PyLammps and IPyLammps wrapper classes in Python. These wrappers try to
|
||||
simplify the usage of LAMMPS in Python by providing an object-based interface
|
||||
to common LAMMPS functionality. It also reduces the amount of code necessary to
|
||||
parameterize LAMMPS scripts through Python and makes variables and computes
|
||||
directly accessible. See "PyLammps interface"_#py_9 for more details.
|
||||
|
||||
Third, LAMMPS can use the Python interpreter, so that a LAMMPS input
|
||||
script can invoke Python code, and pass information back-and-forth
|
||||
between the input script and Python functions you write. The Python
|
||||
code can also callback to LAMMPS to query or change its attributes.
|
||||
In Python lingo, this is "embedding" Python in LAMMPS.
|
||||
|
||||
This section describes how to do both.
|
||||
This section describes how to use these three approaches.
|
||||
|
||||
11.1 "Overview of running LAMMPS from Python"_#py_1
|
||||
11.2 "Overview of using Python from a LAMMPS script"_#py_2
|
||||
11.2 "Overview of using Python from a LAMMPS script"_#py_2
|
||||
11.3 "Building LAMMPS as a shared library"_#py_3
|
||||
11.4 "Installing the Python wrapper into Python"_#py_4
|
||||
11.5 "Extending Python with MPI to run in parallel"_#py_5
|
||||
11.6 "Testing the Python-LAMMPS interface"_#py_6
|
||||
11.7 "Using LAMMPS from Python"_#py_7
|
||||
11.8 "Example Python scripts that use LAMMPS"_#py_8 :ul
|
||||
11.8 "Example Python scripts that use LAMMPS"_#py_8
|
||||
11.9 "PyLammps interface"_#py_9 :ul
|
||||
|
||||
If you are not familiar with it, "Python"_http://www.python.org is a
|
||||
powerful scripting and programming language which can essentially do
|
||||
@ -503,7 +511,7 @@ one of several ways:
|
||||
The last command requires that the first line of the script be
|
||||
something like this:
|
||||
|
||||
#!/usr/local/bin/python
|
||||
#!/usr/local/bin/python
|
||||
#!/usr/local/bin/python -i :pre
|
||||
|
||||
where the path points to where you have Python installed, and that you
|
||||
@ -534,10 +542,11 @@ from lammps import lammps :pre
|
||||
These are the methods defined by the lammps module. If you look at
|
||||
the files src/library.cpp and src/library.h you will see that they
|
||||
correspond one-to-one with calls you can make to the LAMMPS library
|
||||
from a C++ or C or Fortran program.
|
||||
from a C++ or C or Fortran program, and which are described in
|
||||
"Section 6.19"_Section_howto.html#howto_19 of the manual.
|
||||
|
||||
lmp = lammps() # create a LAMMPS object using the default liblammps.so library
|
||||
4 optional args are allowed: name, cmdargs, ptr, comm
|
||||
# 4 optional args are allowed: name, cmdargs, ptr, comm
|
||||
lmp = lammps(ptr=lmpptr) # use lmpptr as previously created LAMMPS object
|
||||
lmp = lammps(comm=split) # create a LAMMPS object with a custom communicator, requires mpi4py 2.0.0 or later
|
||||
lmp = lammps(name="g++") # create a LAMMPS object using the liblammps_g++.so library
|
||||
@ -549,37 +558,41 @@ version = lmp.version() # return the numerical version id, e.g. LAMMPS 2 Sep 20
|
||||
|
||||
lmp.file(file) # run an entire input script, file = "in.lj"
|
||||
lmp.command(cmd) # invoke a single LAMMPS command, cmd = "run 100" :pre
|
||||
lmp.commands_list(cmdlist) # invoke commands in cmdlist = ["run 10", "run 20"]
|
||||
lmp.commands_string(multicmd) # invoke commands in multicmd = "run 10\nrun 20"
|
||||
|
||||
xlo = lmp.extract_global(name,type) # extract a global quantity
|
||||
# name = "boxxlo", "nlocal", etc
|
||||
# type = 0 = int
|
||||
# 1 = double :pre
|
||||
# type = 0 = int
|
||||
# 1 = double :pre
|
||||
|
||||
coords = lmp.extract_atom(name,type) # extract a per-atom quantity
|
||||
# name = "x", "type", etc
|
||||
# type = 0 = vector of ints
|
||||
# 1 = array of ints
|
||||
# 2 = vector of doubles
|
||||
# 3 = array of doubles :pre
|
||||
# type = 0 = vector of ints
|
||||
# 1 = array of ints
|
||||
# 2 = vector of doubles
|
||||
# 3 = array of doubles :pre
|
||||
|
||||
eng = lmp.extract_compute(id,style,type) # extract value(s) from a compute
|
||||
v3 = lmp.extract_fix(id,style,type,i,j) # extract value(s) from a fix
|
||||
# id = ID of compute or fix
|
||||
# style = 0 = global data
|
||||
# 1 = per-atom data
|
||||
# 2 = local data
|
||||
# type = 0 = scalar
|
||||
# 1 = vector
|
||||
# 2 = array
|
||||
# i,j = indices of value in global vector or array :pre
|
||||
# style = 0 = global data
|
||||
# 1 = per-atom data
|
||||
# 2 = local data
|
||||
# type = 0 = scalar
|
||||
# 1 = vector
|
||||
# 2 = array
|
||||
# i,j = indices of value in global vector or array :pre
|
||||
|
||||
var = lmp.extract_variable(name,group,flag) # extract value(s) from a variable
|
||||
# name = name of variable
|
||||
# group = group ID (ignored for equal-style variables)
|
||||
# flag = 0 = equal-style variable
|
||||
# 1 = atom-style variable :pre
|
||||
# name = name of variable
|
||||
# group = group ID (ignored for equal-style variables)
|
||||
# flag = 0 = equal-style variable
|
||||
# 1 = atom-style variable :pre
|
||||
|
||||
flag = lmp.set_variable(name,value) # set existing named string-style variable to value, flag = 0 if successful
|
||||
value = lmp.get_thermo(name) # return current value of a thermo keyword
|
||||
|
||||
natoms = lmp.get_natoms() # total # of atoms as int
|
||||
data = lmp.gather_atoms(name,type,count) # return atom attribute of all atoms gathered into data, ordered by atom ID
|
||||
# name = "x", "charge", "type", etc
|
||||
@ -599,9 +612,10 @@ create an instance of LAMMPS, wrapped in a Python class by the lammps
|
||||
Python module, and return an instance of the Python class as lmp. It
|
||||
is used to make all subequent calls to the LAMMPS library.
|
||||
|
||||
Additional arguments can be used to tell Python the name of the shared
|
||||
library to load or to pass arguments to the LAMMPS instance, the same
|
||||
as if LAMMPS were launched from a command-line prompt.
|
||||
Additional arguments to lammps() can be used to tell Python the name
|
||||
of the shared library to load or to pass arguments to the LAMMPS
|
||||
instance, the same as if LAMMPS were launched from a command-line
|
||||
prompt.
|
||||
|
||||
If the ptr argument is set like this:
|
||||
|
||||
@ -626,8 +640,9 @@ lmp2 = lammps()
|
||||
lmp1.file("in.file1")
|
||||
lmp2.file("in.file2") :pre
|
||||
|
||||
The file() and command() methods allow an input script or single
|
||||
commands to be invoked.
|
||||
The file(), command(), commands_list(), commands_string() methods
|
||||
allow an input script, a single command, or multiple commands to be
|
||||
invoked.
|
||||
|
||||
The extract_global(), extract_atom(), extract_compute(),
|
||||
extract_fix(), and extract_variable() methods return values or
|
||||
@ -724,7 +739,7 @@ lmp.scatter_coords("x",1,3,x) :pre
|
||||
Alternatively, you can just change values in the vector returned by
|
||||
gather_atoms("x",1,3), since it is a ctypes vector of doubles.
|
||||
|
||||
:line
|
||||
:line
|
||||
|
||||
As noted above, these Python class methods correspond one-to-one with
|
||||
the functions in the LAMMPS library interface in src/library.cpp and
|
||||
@ -767,7 +782,7 @@ vizplotgui_tool.py, combination of viz_tool.py and plot.py and gui.py :tb(c=2)
|
||||
|
||||
For the viz_tool.py and vizplotgui_tool.py commands, replace "tool"
|
||||
with "gl" or "atomeye" or "pymol" or "vmd", depending on what
|
||||
visualization package you have installed.
|
||||
visualization package you have installed.
|
||||
|
||||
Note that for GL, you need to be able to run the Pizza.py GL tool,
|
||||
which is included in the pizza sub-directory. See the "Pizza.py doc
|
||||
@ -817,3 +832,7 @@ different visualization package options. Click to see larger images:
|
||||
:image(JPG/screenshot_atomeye_small.jpg,JPG/screenshot_atomeye.jpg)
|
||||
:image(JPG/screenshot_pymol_small.jpg,JPG/screenshot_pymol.jpg)
|
||||
:image(JPG/screenshot_vmd_small.jpg,JPG/screenshot_vmd.jpg)
|
||||
|
||||
11.9 PyLammps interface :link(py_9),h4
|
||||
|
||||
Please see the "PyLammps Tutorial"_tutorial_pylammps.html.
|
||||
|
||||
@ -21,7 +21,6 @@ experienced users.
|
||||
2.8 "Screen output"_#start_8
|
||||
2.9 "Tips for users of previous versions"_#start_9 :all(b)
|
||||
|
||||
:line
|
||||
:line
|
||||
|
||||
2.1 What's in the LAMMPS distribution :h4,link(start_1)
|
||||
@ -34,7 +33,7 @@ tar -xzvf lammps*.tar.gz :pre
|
||||
|
||||
This will create a LAMMPS directory containing two files and several
|
||||
sub-directories:
|
||||
|
||||
|
||||
README: text file
|
||||
LICENSE: the GNU General Public License (GPL)
|
||||
bench: benchmark problems
|
||||
@ -70,12 +69,12 @@ launch a LAMMPS Windows executable on a Windows box.
|
||||
|
||||
This section has the following sub-sections:
|
||||
|
||||
"Read this first"_#start_2_1
|
||||
"Steps to build a LAMMPS executable"_#start_2_2
|
||||
"Common errors that can occur when making LAMMPS"_#start_2_3
|
||||
"Additional build tips"_#start_2_4
|
||||
"Building for a Mac"_#start_2_5
|
||||
"Building for Windows"_#start_2_6 :ul
|
||||
2.2.1 "Read this first"_#start_2_1
|
||||
2.2.1 "Steps to build a LAMMPS executable"_#start_2_2
|
||||
2.2.3 "Common errors that can occur when making LAMMPS"_#start_2_3
|
||||
2.2.4 "Additional build tips"_#start_2_4
|
||||
2.2.5 "Building for a Mac"_#start_2_5
|
||||
2.2.6 "Building for Windows"_#start_2_6 :all(b)
|
||||
|
||||
:line
|
||||
|
||||
@ -559,8 +558,7 @@ Typing "make clean-all" or "make clean-machine" will delete *.o object
|
||||
files created when LAMMPS is built, for either all builds or for a
|
||||
particular machine.
|
||||
|
||||
Changing the LAMMPS size limits via -DLAMMPS_SMALLBIG or
|
||||
-DLAMMPS_BIGBIG or -DLAMMPS_SMALLSMALL :h6
|
||||
Changing the LAMMPS size limits via -DLAMMPS_SMALLBIG or -DLAMMPS_BIGBIG or -DLAMMPS_SMALLSMALL :h6
|
||||
|
||||
As explained above, any of these 3 settings can be specified on the
|
||||
LMP_INC line in your low-level src/MAKE/Makefile.foo.
|
||||
@ -602,17 +600,17 @@ LAMMPS will generate a run-time error. As far as we know, the
|
||||
settings defined in src/lmptype.h are portable and work on every
|
||||
current system.
|
||||
|
||||
In all cases, the size of problem that can be run on a per-processor
|
||||
basis is limited by 4-byte integer storage to 2^31 atoms per processor
|
||||
(about 2 billion). This should not normally be a limitation since such
|
||||
a problem would have a huge per-processor memory footprint due to
|
||||
In all cases, the size of problem that can be run on a per-processor
|
||||
basis is limited by 4-byte integer storage to 2^31 atoms per processor
|
||||
(about 2 billion). This should not normally be a limitation since such
|
||||
a problem would have a huge per-processor memory footprint due to
|
||||
neighbor lists and would run very slowly in terms of CPU secs/timestep.
|
||||
|
||||
:line
|
||||
|
||||
Building for a Mac :h5,link(start_2_5)
|
||||
|
||||
OS X is BSD Unix, so it should just work. See the
|
||||
OS X is a derivative of BSD Unix, so it should just work. See the
|
||||
src/MAKE/MACHINES/Makefile.mac and Makefile.mac_mpi files.
|
||||
|
||||
:line
|
||||
@ -637,9 +635,9 @@ happy to distribute contributed instructions and modifications, but
|
||||
we cannot provide support for those.
|
||||
|
||||
With the so-called "Anniversary Update" to Windows 10, there is a
|
||||
Ubuntu subsystem available for Windows, that can be installed and
|
||||
then it can be used to compile/install LAMMPS as if you are running
|
||||
on a Ubuntu Linux system.
|
||||
Ubuntu Linux subsystem available for Windows, that can be installed
|
||||
and then used to compile/install LAMMPS as if you are running on a
|
||||
Ubuntu Linux system instead of Windows.
|
||||
|
||||
As an alternative, you can download "daily builds" (and some older
|
||||
versions) of the installer packages from
|
||||
@ -654,10 +652,10 @@ many examples, but no source code.
|
||||
|
||||
This section has the following sub-sections:
|
||||
|
||||
"Package basics"_#start_3_1
|
||||
"Including/excluding packages"_#start_3_2
|
||||
"Packages that require extra libraries"_#start_3_3
|
||||
"Packages that require Makefile.machine settings"_#start_3_4 :ul
|
||||
2.3.1 "Package basics"_#start_3_1
|
||||
2.3.2 "Including/excluding packages"_#start_3_2
|
||||
2.3.3 "Packages that require extra libraries"_#start_3_3
|
||||
2.3.4 "Packages that require Makefile.machine settings"_#start_3_4 :all(b)
|
||||
|
||||
Note that the following "Section 2.4"_#start_4 describes the Make.py
|
||||
tool which can be used to install/un-install packages and build the
|
||||
@ -673,7 +671,7 @@ are always included, plus optional packages. Packages are groups of
|
||||
files that enable a specific set of features. For example, force
|
||||
fields for molecular systems or granular systems are in packages.
|
||||
|
||||
"Section packages"_Section_packages.html in the manual has details
|
||||
"Section 4"_Section_packages.html in the manual has details
|
||||
about all the packages, including specific instructions for building
|
||||
LAMMPS with each package, which are covered in a more general manner
|
||||
below.
|
||||
@ -708,7 +706,7 @@ future changes to LAMMPS.
|
||||
User packages, such as user-atc or user-omp, have been contributed by
|
||||
users, and always begin with the user prefix. If they are a single
|
||||
command (single file), they are typically in the user-misc package.
|
||||
Otherwise, they are a a set of files grouped together which add a
|
||||
Otherwise, they are a set of files grouped together which add a
|
||||
specific functionality to the code.
|
||||
|
||||
User packages don't necessarily meet the requirements of the standard
|
||||
@ -727,15 +725,15 @@ before building LAMMPS. From the src directory, this is typically as
|
||||
simple as:
|
||||
|
||||
make yes-colloid
|
||||
make g++ :pre
|
||||
make mpi :pre
|
||||
|
||||
or
|
||||
|
||||
make no-manybody
|
||||
make g++ :pre
|
||||
make mpi :pre
|
||||
|
||||
NOTE: You should NOT include/exclude packages and build LAMMPS in a
|
||||
single make command using multiple targets, e.g. make yes-colloid g++.
|
||||
single make command using multiple targets, e.g. make yes-colloid mpi.
|
||||
This is because the make procedure creates a list of source files that
|
||||
will be out-of-date for the build if the package configuration changes
|
||||
within the same command.
|
||||
@ -826,7 +824,7 @@ where to find them.
|
||||
For libraries with provided code, the sub-directory README file
|
||||
(e.g. lib/atc/README) has instructions on how to build that library.
|
||||
This information is also summarized in "Section
|
||||
packages"_Section_packages.html. Typically this is done by typing
|
||||
4"_Section_packages.html. Typically this is done by typing
|
||||
something like:
|
||||
|
||||
make -f Makefile.g++ :pre
|
||||
@ -843,7 +841,7 @@ libpackage.a
|
||||
Makefile.lammps :pre
|
||||
|
||||
The Makefile.lammps file will typically be a copy of one of the
|
||||
Makefile.lammps.* files in the library directory.
|
||||
Makefile.lammps.* files in the library directory.
|
||||
|
||||
Note that you must insure that the settings in Makefile.lammps are
|
||||
appropriate for your system. If they are not, the LAMMPS build may
|
||||
@ -885,17 +883,17 @@ A few packages require specific settings in Makefile.machine, to
|
||||
either build or use the package effectively. These are the
|
||||
USER-INTEL, KOKKOS, USER-OMP, and OPT packages, used for accelerating
|
||||
code performance on CPUs or other hardware, as discussed in "Section
|
||||
acclerate"_Section_accelerate.html.
|
||||
5.3"_Section_accelerate.html#acc_3.
|
||||
|
||||
A summary of what Makefile.machine changes are needed for each of
|
||||
these packages is given in "Section packages"_Section_packages.html.
|
||||
these packages is given in "Section 4"_Section_packages.html.
|
||||
The details are given on the doc pages that describe each of these
|
||||
accelerator packages in detail:
|
||||
|
||||
"USER-INTEL package"_accelerate_intel.html
|
||||
"KOKKOS package"_accelerate_kokkos.html
|
||||
"USER-OMP package"_accelerate_omp.html
|
||||
"OPT package"_accelerate_opt.html :ul
|
||||
5.3.1 "USER-INTEL package"_accelerate_intel.html
|
||||
5.3.3 "KOKKOS package"_accelerate_kokkos.html
|
||||
5.3.4 "USER-OMP package"_accelerate_omp.html
|
||||
5.3.5 "OPT package"_accelerate_opt.html :all(b)
|
||||
|
||||
You can also look at the following machine Makefiles in
|
||||
src/MAKE/OPTIONS, which include the changes. Note that the USER-INTEL
|
||||
@ -1201,7 +1199,7 @@ installer package from "here"_http://rpm.lammps.org/windows.html
|
||||
|
||||
For running the non-MPI executable, follow these steps:
|
||||
|
||||
Get a command prompt by going to Start->Run... ,
|
||||
Get a command prompt by going to Start->Run... ,
|
||||
then typing "cmd". :ulb,l
|
||||
|
||||
Move to the directory where you have your input, e.g. a copy of
|
||||
@ -1211,7 +1209,7 @@ At the command prompt, type "lmp_serial -in in.lj", replacing [in.lj]
|
||||
with the name of your LAMMPS input script. :l
|
||||
:ule
|
||||
|
||||
For the MPI version, which allows you to run LAMMPS under Windows on
|
||||
For the MPI version, which allows you to run LAMMPS under Windows on
|
||||
multiple processors, follow these steps:
|
||||
|
||||
Download and install
|
||||
@ -1226,7 +1224,7 @@ For this you need to start a Command Prompt in {Administrator Mode}
|
||||
installation directory, then into the subdirectory [bin] and execute
|
||||
[smpd.exe -install]. Exit the command window.
|
||||
|
||||
Get a new, regular command prompt by going to Start->Run... ,
|
||||
Get a new, regular command prompt by going to Start->Run... ,
|
||||
then typing "cmd". :l
|
||||
|
||||
Move to the directory where you have your input file
|
||||
@ -1367,7 +1365,7 @@ Note that the keywords do not use a leading minus sign. I.e. the
|
||||
keyword is "t", not "-t". Also note that each of the keywords has a
|
||||
default setting. Example of when to use these options and what
|
||||
settings to use on different platforms is given in "Section
|
||||
5.8"_Section_accelerate.html#acc_3.
|
||||
5.3"_Section_accelerate.html#acc_3.
|
||||
|
||||
d or device
|
||||
g or gpus
|
||||
@ -1490,7 +1488,7 @@ of the manual. World- and universe-style "variables"_variable.html
|
||||
are useful in this context.
|
||||
|
||||
-plog file :pre
|
||||
|
||||
|
||||
Specify the base name for the partition log files, so partition N
|
||||
writes log information to file.N. If file is none, then no partition
|
||||
log files are created. This overrides the filename specified in the
|
||||
@ -1501,7 +1499,7 @@ replica_files/log.lammps) If this option is not used the log file for
|
||||
partition N is log.lammps.N or whatever is specified by the -log
|
||||
command-line option.
|
||||
|
||||
-pscreen file :pre
|
||||
-pscreen file :pre
|
||||
|
||||
Specify the base name for the partition screen file, so partition N
|
||||
writes screen information to file.N. If file is none, then no
|
||||
@ -1513,7 +1511,7 @@ sub-directory (-pscreen replica_files/screen). If this option is not
|
||||
used the screen file for partition N is screen.N or whatever is
|
||||
specified by the -screen command-line option.
|
||||
|
||||
-restart restartfile {remap} datafile keyword value ... :pre
|
||||
-restart restartfile {remap} datafile keyword value ... :pre
|
||||
|
||||
Convert the restart file into a data file and immediately exit. This
|
||||
is the same operation as if the following 2-line input script were
|
||||
@ -1574,7 +1572,7 @@ to
|
||||
|
||||
so that the processors in each partition will be
|
||||
|
||||
0 1 2 4 5 6 8 9 10
|
||||
0 1 2 4 5 6 8 9 10
|
||||
3 7 11 :pre
|
||||
|
||||
See the "processors" command for how to insure processors from each
|
||||
@ -1603,9 +1601,9 @@ implementations, either by environment variables that specify how to
|
||||
order physical processors, or by config files that specify what
|
||||
physical processors to assign to each MPI rank. The -reorder switch
|
||||
simply gives you a portable way to do this without relying on MPI
|
||||
itself. See the "processors out"_processors command for how to output
|
||||
info on the final assignment of physical processors to the LAMMPS
|
||||
simulation domain.
|
||||
itself. See the "processors out"_processors.html command for how
|
||||
to output info on the final assignment of physical processors to
|
||||
the LAMMPS simulation domain.
|
||||
|
||||
-screen file :pre
|
||||
|
||||
@ -1665,12 +1663,12 @@ invokes the default USER-INTEL settings, as if the command "package
|
||||
intel 1" were used at the top of your input script. These settings
|
||||
can be changed by using the "-package intel" command-line switch or
|
||||
the "package intel"_package.html command in your script. If the
|
||||
USER-OMP package is also installed, the hybrid style with "intel omp"
|
||||
arguments can be used to make the omp suffix a second choice, if a
|
||||
requested style is not available in the USER-INTEL package. It will
|
||||
also invoke the default USER-OMP settings, as if the command "package
|
||||
omp 0" were used at the top of your input script. These settings can
|
||||
be changed by using the "-package omp" command-line switch or the
|
||||
USER-OMP package is also installed, the hybrid style with "intel omp"
|
||||
arguments can be used to make the omp suffix a second choice, if a
|
||||
requested style is not available in the USER-INTEL package. It will
|
||||
also invoke the default USER-OMP settings, as if the command "package
|
||||
omp 0" were used at the top of your input script. These settings can
|
||||
be changed by using the "-package omp" command-line switch or the
|
||||
"package omp"_package.html command in your script.
|
||||
|
||||
For the KOKKOS package, using this command-line switch also invokes
|
||||
@ -1835,7 +1833,7 @@ e.g.
|
||||
|
||||
Minimization stats:
|
||||
Stopping criterion = linesearch alpha is zero
|
||||
Energy initial, next-to-last, final =
|
||||
Energy initial, next-to-last, final =
|
||||
-6372.3765206 -8328.46998942 -8328.46998942
|
||||
Force two-norm initial, final = 1059.36 5.36874
|
||||
Force max component initial, final = 58.6026 1.46872
|
||||
|
||||
@ -104,12 +104,13 @@ since binary files are not compatible across all platforms.
|
||||
ch2lmp tool :h4,link(charmm)
|
||||
|
||||
The ch2lmp sub-directory contains tools for converting files
|
||||
back-and-forth between the CHARMM MD code and LAMMPS.
|
||||
back-and-forth between the CHARMM MD code and LAMMPS.
|
||||
|
||||
They are intended to make it easy to use CHARMM as a builder and as a
|
||||
post-processor for LAMMPS. Using charmm2lammps.pl, you can convert an
|
||||
ensemble built in CHARMM into its LAMMPS equivalent. Using
|
||||
lammps2pdb.pl you can convert LAMMPS atom dumps into pdb files.
|
||||
post-processor for LAMMPS. Using charmm2lammps.pl, you can convert a
|
||||
PDB file with associated CHARMM info, including CHARMM force field
|
||||
data, into its LAMMPS equivalent. Using lammps2pdb.pl you can convert
|
||||
LAMMPS atom dumps into PDB files.
|
||||
|
||||
See the README file in the ch2lmp sub-directory for more information.
|
||||
|
||||
|
||||
@ -29,80 +29,80 @@ Bond Styles: fene, harmonic :l
|
||||
Dihedral Styles: charmm, harmonic, opls :l
|
||||
Fixes: nve, npt, nvt, nvt/sllod :l
|
||||
Improper Styles: cvff, harmonic :l
|
||||
Pair Styles: buck/coul/cut, buck/coul/long, buck, gayberne,
|
||||
Pair Styles: buck/coul/cut, buck/coul/long, buck, gayberne,
|
||||
charmm/coul/long, lj/cut, lj/cut/coul/long, sw, tersoff :l
|
||||
K-Space Styles: pppm :l
|
||||
:ule
|
||||
|
||||
[Speed-ups to expect:]
|
||||
|
||||
The speedups will depend on your simulation, the hardware, which
|
||||
styles are used, the number of atoms, and the floating-point
|
||||
precision mode. Performance improvements are shown compared to
|
||||
LAMMPS {without using other acceleration packages} as these are
|
||||
under active development (and subject to performance changes). The
|
||||
The speedups will depend on your simulation, the hardware, which
|
||||
styles are used, the number of atoms, and the floating-point
|
||||
precision mode. Performance improvements are shown compared to
|
||||
LAMMPS {without using other acceleration packages} as these are
|
||||
under active development (and subject to performance changes). The
|
||||
measurements were performed using the input files available in
|
||||
the src/USER-INTEL/TEST directory. These are scalable in size; the
|
||||
results given are with 512K particles (524K for Liquid Crystal).
|
||||
the src/USER-INTEL/TEST directory. These are scalable in size; the
|
||||
results given are with 512K particles (524K for Liquid Crystal).
|
||||
Most of the simulations are standard LAMMPS benchmarks (indicated
|
||||
by the filename extension in parenthesis) with modifications to the
|
||||
run length and to add a warmup run (for use with offload
|
||||
benchmarks).
|
||||
by the filename extension in parenthesis) with modifications to the
|
||||
run length and to add a warmup run (for use with offload
|
||||
benchmarks).
|
||||
|
||||
:c,image(JPG/user_intel.png)
|
||||
|
||||
Results are speedups obtained on Intel Xeon E5-2697v4 processors
|
||||
(code-named Broadwell) and Intel Xeon Phi 7250 processors
|
||||
Results are speedups obtained on Intel Xeon E5-2697v4 processors
|
||||
(code-named Broadwell) and Intel Xeon Phi 7250 processors
|
||||
(code-named Knights Landing) with "18 Jun 2016" LAMMPS built with
|
||||
Intel Parallel Studio 2016 update 3. Results are with 1 MPI task
|
||||
per physical core. See {src/USER-INTEL/TEST/README} for the raw
|
||||
Intel Parallel Studio 2016 update 3. Results are with 1 MPI task
|
||||
per physical core. See {src/USER-INTEL/TEST/README} for the raw
|
||||
simulation rates and instructions to reproduce.
|
||||
|
||||
:line
|
||||
|
||||
[Quick Start for Experienced Users:]
|
||||
|
||||
LAMMPS should be built with the USER-INTEL package installed.
|
||||
LAMMPS should be built with the USER-INTEL package installed.
|
||||
Simulations should be run with 1 MPI task per physical {core},
|
||||
not {hardware thread}.
|
||||
|
||||
For Intel Xeon CPUs:
|
||||
|
||||
Edit src/MAKE/OPTIONS/Makefile.intel_cpu_intelmpi as necessary. :ulb,l
|
||||
If using {kspace_style pppm} in the input script, add "neigh_modify binsize 3" and "kspace_modify diff ad" to the input script for better
|
||||
If using {kspace_style pppm} in the input script, add "neigh_modify binsize 3" and "kspace_modify diff ad" to the input script for better
|
||||
performance. :l
|
||||
"-pk intel 0 omp 2 -sf intel" added to LAMMPS command-line :l
|
||||
:ule
|
||||
|
||||
For Intel Xeon Phi CPUs for simulations without {kspace_style
|
||||
For Intel Xeon Phi CPUs for simulations without {kspace_style
|
||||
pppm} in the input script :
|
||||
|
||||
Edit src/MAKE/OPTIONS/Makefile.knl as necessary. :ulb,l
|
||||
Runs should be performed using MCDRAM. :l
|
||||
"-pk intel 0 omp 2 -sf intel" {or} "-pk intel 0 omp 4 -sf intel"
|
||||
should be added to the LAMMPS command-line. Choice for best
|
||||
"-pk intel 0 omp 2 -sf intel" {or} "-pk intel 0 omp 4 -sf intel"
|
||||
should be added to the LAMMPS command-line. Choice for best
|
||||
performance will depend on the simulation. :l
|
||||
:ule
|
||||
|
||||
For Intel Xeon Phi CPUs for simulations with {kspace_style
|
||||
For Intel Xeon Phi CPUs for simulations with {kspace_style
|
||||
pppm} in the input script:
|
||||
|
||||
Edit src/MAKE/OPTIONS/Makefile.knl as necessary. :ulb,l
|
||||
Runs should be performed using MCDRAM. :l
|
||||
Add "neigh_modify binsize 3" to the input script for better
|
||||
Add "neigh_modify binsize 3" to the input script for better
|
||||
performance. :l
|
||||
Add "kspace_modify diff ad" to the input script for better
|
||||
Add "kspace_modify diff ad" to the input script for better
|
||||
performance. :l
|
||||
export KMP_AFFINITY=none :l
|
||||
"-pk intel 0 omp 3 lrt yes -sf intel" or "-pk intel 0 omp 1 lrt yes
|
||||
-sf intel" added to LAMMPS command-line. Choice for best performance
|
||||
-sf intel" added to LAMMPS command-line. Choice for best performance
|
||||
will depend on the simulation. :l
|
||||
:ule
|
||||
|
||||
For Intel Xeon Phi coprocessors (Offload):
|
||||
For Intel Xeon Phi coprocessors (Offload):
|
||||
|
||||
Edit src/MAKE/OPTIONS/Makefile.intel_coprocessor as necessary :ulb,l
|
||||
"-pk intel N omp 1" added to command-line where N is the number of
|
||||
"-pk intel N omp 1" added to command-line where N is the number of
|
||||
coprocessors per node. :l
|
||||
:ule
|
||||
|
||||
@ -111,7 +111,7 @@ coprocessors per node. :l
|
||||
[Required hardware/software:]
|
||||
|
||||
In order to use offload to coprocessors, an Intel Xeon Phi
|
||||
coprocessor and an Intel compiler are required. For this, the
|
||||
coprocessor and an Intel compiler are required. For this, the
|
||||
recommended version of the Intel compiler is 14.0.1.106 or
|
||||
versions 15.0.2.044 and higher.
|
||||
|
||||
@ -133,7 +133,7 @@ slightly lower.
|
||||
|
||||
[Notes about Simultaneous Multithreading:]
|
||||
|
||||
Modern CPUs often support Simultaneous Multithreading (SMT). On
|
||||
Modern CPUs often support Simultaneous Multithreading (SMT). On
|
||||
Intel processors, this is called Hyper-Threading (HT) technology.
|
||||
SMT is hardware support for running multiple threads efficiently on
|
||||
a single core. {Hardware threads} or {logical cores} are often used
|
||||
@ -141,8 +141,8 @@ to refer to the number of threads that are supported in hardware.
|
||||
For example, the Intel Xeon E5-2697v4 processor is described
|
||||
as having 36 cores and 72 threads. This means that 36 MPI processes
|
||||
or OpenMP threads can run simultaneously on separate cores, but that
|
||||
up to 72 MPI processes or OpenMP threads can be running on the CPU
|
||||
without costly operating system context switches.
|
||||
up to 72 MPI processes or OpenMP threads can be running on the CPU
|
||||
without costly operating system context switches.
|
||||
|
||||
Molecular dynamics simulations will often run faster when making use
|
||||
of SMT. If a thread becomes stalled, for example because it is
|
||||
@ -150,18 +150,18 @@ waiting on data that has not yet arrived from memory, another thread
|
||||
can start running so that the CPU pipeline is still being used
|
||||
efficiently. Although benefits can be seen by launching a MPI task
|
||||
for every hardware thread, for multinode simulations, we recommend
|
||||
that OpenMP threads are used for SMT instead, either with the
|
||||
USER-INTEL package, "USER-OMP package"_accelerate_omp.html", or
|
||||
that OpenMP threads are used for SMT instead, either with the
|
||||
USER-INTEL package, "USER-OMP package"_accelerate_omp.html, or
|
||||
"KOKKOS package"_accelerate_kokkos.html. In the example above, up
|
||||
to 36X speedups can be observed by using all 36 physical cores with
|
||||
LAMMPS. By using all 72 hardware threads, an additional 10-30%
|
||||
performance gain can be achieved.
|
||||
|
||||
The BIOS on many platforms allows SMT to be disabled, however, we do
|
||||
not recommend this on modern processors as there is little to no
|
||||
not recommend this on modern processors as there is little to no
|
||||
benefit for any software package in most cases. The operating system
|
||||
will report every hardware thread as a separate core allowing one to
|
||||
determine the number of hardware threads available. On Linux systems,
|
||||
will report every hardware thread as a separate core allowing one to
|
||||
determine the number of hardware threads available. On Linux systems,
|
||||
this information can normally be obtained with:
|
||||
|
||||
cat /proc/cpuinfo :pre
|
||||
@ -182,21 +182,21 @@ Makefile.intel_cpu_openpmi # Intel Compiler, OpenMPI, No Offload
|
||||
Makefile.intel_coprocessor # Intel Compiler, Intel MPI, Offload :pre
|
||||
|
||||
Makefile.knl is identical to Makefile.intel_cpu_intelmpi except that
|
||||
it explicitly specifies that vectorization should be for Intel
|
||||
Xeon Phi x200 processors making it easier to cross-compile. For
|
||||
users with recent installations of Intel Parallel Studio, the
|
||||
it explicitly specifies that vectorization should be for Intel
|
||||
Xeon Phi x200 processors making it easier to cross-compile. For
|
||||
users with recent installations of Intel Parallel Studio, the
|
||||
process can be as simple as:
|
||||
|
||||
make yes-user-intel
|
||||
source /opt/intel/parallel_studio_xe_2016.3.067/psxevars.sh
|
||||
source /opt/intel/parallel_studio_xe_2016.3.067/psxevars.sh
|
||||
# or psxevars.csh for C-shell
|
||||
make intel_cpu_intelmpi :pre
|
||||
|
||||
Alternatively, the build can be accomplished with the src/Make.py
|
||||
script, described in "Section 2.4"_Section_start.html#start_4 of the
|
||||
Alternatively, the build can be accomplished with the src/Make.py
|
||||
script, described in "Section 2.4"_Section_start.html#start_4 of the
|
||||
manual. Type "Make.py -h" for help. For an example:
|
||||
|
||||
Make.py -v -p intel omp -intel cpu -a file intel_cpu_intelmpi :pre
|
||||
Make.py -v -p intel omp -intel cpu -a file intel_cpu_intelmpi :pre
|
||||
|
||||
Note that if you build with support for a Phi coprocessor, the same
|
||||
binary can be used on nodes with or without coprocessors installed.
|
||||
@ -205,26 +205,26 @@ without offload support will produce a smaller binary.
|
||||
|
||||
The general requirements for Makefiles with the USER-INTEL package
|
||||
are as follows. "-DLAMMPS_MEMALIGN=64" is required for CCFLAGS. When
|
||||
using Intel compilers, "-restrict" is required and "-qopenmp" is
|
||||
highly recommended for CCFLAGS and LINKFLAGS. LIB should include
|
||||
using Intel compilers, "-restrict" is required and "-qopenmp" is
|
||||
highly recommended for CCFLAGS and LINKFLAGS. LIB should include
|
||||
"-ltbbmalloc". For builds supporting offload, "-DLMP_INTEL_OFFLOAD"
|
||||
is required for CCFLAGS and "-qoffload" is required for LINKFLAGS.
|
||||
Other recommended CCFLAG options for best performance are
|
||||
"-O2 -fno-alias -ansi-alias -qoverride-limits fp-model fast=2
|
||||
-no-prec-div". The Make.py command will add all of these
|
||||
Other recommended CCFLAG options for best performance are
|
||||
"-O2 -fno-alias -ansi-alias -qoverride-limits fp-model fast=2
|
||||
-no-prec-div". The Make.py command will add all of these
|
||||
automatically.
|
||||
|
||||
NOTE: The vectorization and math capabilities can differ depending on
|
||||
the CPU. For Intel compilers, the "-x" flag specifies the type of
|
||||
processor for which to optimize. "-xHost" specifies that the compiler
|
||||
should build for the processor used for compiling. For Intel Xeon Phi
|
||||
should build for the processor used for compiling. For Intel Xeon Phi
|
||||
x200 series processors, this option is "-xMIC-AVX512". For fourth
|
||||
generation Intel Xeon (v4/Broadwell) processors, "-xCORE-AVX2" should
|
||||
generation Intel Xeon (v4/Broadwell) processors, "-xCORE-AVX2" should
|
||||
be used. For older Intel Xeon processors, "-xAVX" will perform best
|
||||
in general for the different simulations in LAMMPS. The default
|
||||
in most of the example Makefiles is to use "-xHost", however this
|
||||
should not be used when cross-compiling.
|
||||
|
||||
|
||||
[Running LAMMPS with the USER-INTEL package:]
|
||||
|
||||
Running LAMMPS with the USER-INTEL package is similar to normal use
|
||||
@ -232,7 +232,7 @@ with the exceptions that one should 1) specify that LAMMPS should use
|
||||
the USER-INTEL package, 2) specify the number of OpenMP threads, and
|
||||
3) optionally specify the specific LAMMPS styles that should use the
|
||||
USER-INTEL package. 1) and 2) can be performed from the command-line
|
||||
or by editing the input script. 3) requires editing the input script.
|
||||
or by editing the input script. 3) requires editing the input script.
|
||||
Advanced performance tuning options are also described below to get
|
||||
the best performance.
|
||||
|
||||
@ -241,14 +241,14 @@ coprocessor), best performance is normally obtained by using 1 MPI
|
||||
task per physical core and additional OpenMP threads with SMT. For
|
||||
Intel Xeon processors, 2 OpenMP threads should be used for SMT.
|
||||
For Intel Xeon Phi CPUs, 2 or 4 OpenMP threads should be used
|
||||
(best choice depends on the simulation). In cases where the user
|
||||
specifies that LRT mode is used (described below), 1 or 3 OpenMP
|
||||
(best choice depends on the simulation). In cases where the user
|
||||
specifies that LRT mode is used (described below), 1 or 3 OpenMP
|
||||
threads should be used. For multi-node runs, using 1 MPI task per
|
||||
physical core will often perform best, however, depending on the
|
||||
machine and scale, users might get better performance by decreasing
|
||||
the number of MPI tasks and using more OpenMP threads. For
|
||||
performance, the product of the number of MPI tasks and OpenMP
|
||||
threads should not exceed the number of available hardware threads in
|
||||
the number of MPI tasks and using more OpenMP threads. For
|
||||
performance, the product of the number of MPI tasks and OpenMP
|
||||
threads should not exceed the number of available hardware threads in
|
||||
almost all cases.
|
||||
|
||||
NOTE: Setting core affinity is often used to pin MPI tasks and OpenMP
|
||||
@ -257,21 +257,21 @@ uniform. Unless disabled at build time, affinity for MPI tasks and
|
||||
OpenMP threads on the host (CPU) will be set by default on the host
|
||||
{when using offload to a coprocessor}. In this case, it is unnecessary
|
||||
to use other methods to control affinity (e.g. taskset, numactl,
|
||||
I_MPI_PIN_DOMAIN, etc.). This can be disabled with the {no_affinity}
|
||||
option to the "package intel"_package.html command or by disabling the
|
||||
option at build time (by adding -DINTEL_OFFLOAD_NOAFFINITY to the
|
||||
CCFLAGS line of your Makefile). Disabling this option is not
|
||||
recommended, especially when running on a machine with Intel
|
||||
I_MPI_PIN_DOMAIN, etc.). This can be disabled with the {no_affinity}
|
||||
option to the "package intel"_package.html command or by disabling the
|
||||
option at build time (by adding -DINTEL_OFFLOAD_NOAFFINITY to the
|
||||
CCFLAGS line of your Makefile). Disabling this option is not
|
||||
recommended, especially when running on a machine with Intel
|
||||
Hyper-Threading technology disabled.
|
||||
|
||||
[Run with the USER-INTEL package from the command line:]
|
||||
|
||||
To enable USER-INTEL optimizations for all available styles used in
|
||||
the input script, the "-sf intel"
|
||||
To enable USER-INTEL optimizations for all available styles used in
|
||||
the input script, the "-sf intel"
|
||||
"command-line switch"_Section_start.html#start_7 can be used without
|
||||
any requirement for editing the input script. This switch will
|
||||
automatically append "intel" to styles that support it. It also
|
||||
invokes a default command: "package intel 1"_package.html. This
|
||||
automatically append "intel" to styles that support it. It also
|
||||
invokes a default command: "package intel 1"_package.html. This
|
||||
package command is used to set options for the USER-INTEL package.
|
||||
The default package command will specify that USER-INTEL calculations
|
||||
are performed in mixed precision, that the number of OpenMP threads
|
||||
@ -281,16 +281,16 @@ support, that 1 coprocessor per node will be used with automatic
|
||||
balancing of work between the CPU and the coprocessor.
|
||||
|
||||
You can specify different options for the USER-INTEL package by using
|
||||
the "-pk intel Nphi" "command-line switch"_Section_start.html#start_7
|
||||
the "-pk intel Nphi" "command-line switch"_Section_start.html#start_7
|
||||
with keyword/value pairs as specified in the documentation. Here,
|
||||
Nphi = # of Xeon Phi coprocessors/node (ignored without offload
|
||||
support). Common options to the USER-INTEL package include {omp} to
|
||||
override any OMP_NUM_THREADS setting and specify the number of OpenMP
|
||||
threads, {mode} to set the floating-point precision mode, and
|
||||
{lrt} to enable Long-Range Thread mode as described below. See the
|
||||
"package intel"_package.html command for details, including the
|
||||
default values used for all its options if not specified, and how to
|
||||
set the number of OpenMP threads via the OMP_NUM_THREADS environment
|
||||
{lrt} to enable Long-Range Thread mode as described below. See the
|
||||
"package intel"_package.html command for details, including the
|
||||
default values used for all its options if not specified, and how to
|
||||
set the number of OpenMP threads via the OMP_NUM_THREADS environment
|
||||
variable if desired.
|
||||
|
||||
Examples (see documentation for your MPI/Machine for differences in
|
||||
@ -303,7 +303,7 @@ mpirun -np 72 -ppn 36 lmp_machine -sf intel -in in.script -pk intel 0 omp 2 mode
|
||||
|
||||
As an alternative to adding command-line arguments, the input script
|
||||
can be edited to enable the USER-INTEL package. This requires adding
|
||||
the "package intel"_package.html command to the top of the input
|
||||
the "package intel"_package.html command to the top of the input
|
||||
script. For the second example above, this would be:
|
||||
|
||||
package intel 0 omp 2 mode double :pre
|
||||
@ -314,46 +314,46 @@ add an "intel" suffix to the individual style, e.g.:
|
||||
pair_style lj/cut/intel 2.5 :pre
|
||||
|
||||
Alternatively, the "suffix intel"_suffix.html command can be added to
|
||||
the input script to enable USER-INTEL styles for the commands that
|
||||
the input script to enable USER-INTEL styles for the commands that
|
||||
follow in the input script.
|
||||
|
||||
[Tuning for Performance:]
|
||||
|
||||
NOTE: The USER-INTEL package will perform better with modifications
|
||||
to the input script when "PPPM"_kspace_style.html is used:
|
||||
"kspace_modify diff ad"_kspace_modify.html and "neigh_modify binsize
|
||||
NOTE: The USER-INTEL package will perform better with modifications
|
||||
to the input script when "PPPM"_kspace_style.html is used:
|
||||
"kspace_modify diff ad"_kspace_modify.html and "neigh_modify binsize
|
||||
3"_neigh_modify.html should be added to the input script.
|
||||
|
||||
Long-Range Thread (LRT) mode is an option to the "package
|
||||
Long-Range Thread (LRT) mode is an option to the "package
|
||||
intel"_package.html command that can improve performance when using
|
||||
"PPPM"_kspace_style.html for long-range electrostatics on processors
|
||||
with SMT. It generates an extra pthread for each MPI task. The thread
|
||||
is dedicated to performing some of the PPPM calculations and MPI
|
||||
with SMT. It generates an extra pthread for each MPI task. The thread
|
||||
is dedicated to performing some of the PPPM calculations and MPI
|
||||
communications. On Intel Xeon Phi x200 series CPUs, this will likely
|
||||
always improve performance, even on a single node. On Intel Xeon
|
||||
processors, using this mode might result in better performance when
|
||||
using multiple nodes, depending on the machine. To use this mode,
|
||||
specify that the number of OpenMP threads is one less than would
|
||||
specify that the number of OpenMP threads is one less than would
|
||||
normally be used for the run and add the "lrt yes" option to the "-pk"
|
||||
command-line suffix or "package intel" command. For example, if a run
|
||||
would normally perform best with "-pk intel 0 omp 4", instead use
|
||||
"-pk intel 0 omp 3 lrt yes". When using LRT, you should set the
|
||||
environment variable "KMP_AFFINITY=none". LRT mode is not supported
|
||||
"-pk intel 0 omp 3 lrt yes". When using LRT, you should set the
|
||||
environment variable "KMP_AFFINITY=none". LRT mode is not supported
|
||||
when using offload.
|
||||
|
||||
Not all styles are supported in the USER-INTEL package. You can mix
|
||||
the USER-INTEL package with styles from the "OPT"_accelerate_opt.html
|
||||
package or the "USER-OMP package"_accelerate_omp.html". Of course,
|
||||
the USER-INTEL package with styles from the "OPT"_accelerate_opt.html
|
||||
package or the "USER-OMP package"_accelerate_omp.html. Of course,
|
||||
this requires that these packages were installed at build time. This
|
||||
can performed automatically by using "-sf hybrid intel opt" or
|
||||
"-sf hybrid intel omp" command-line options. Alternatively, the "opt"
|
||||
and "omp" suffixes can be appended manually in the input script. For
|
||||
the latter, the "package omp"_package.html command must be in the
|
||||
input script or the "-pk omp Nt" "command-line
|
||||
switch"_Section_start.html#start_7 must be used where Nt is the
|
||||
input script or the "-pk omp Nt" "command-line
|
||||
switch"_Section_start.html#start_7 must be used where Nt is the
|
||||
number of OpenMP threads. The number of OpenMP threads should not be
|
||||
set differently for the different packages. Note that the "suffix
|
||||
hybrid intel omp"_suffix.html command can also be used within the
|
||||
set differently for the different packages. Note that the "suffix
|
||||
hybrid intel omp"_suffix.html command can also be used within the
|
||||
input script to automatically append the "omp" suffix to styles when
|
||||
USER-INTEL styles are not available.
|
||||
|
||||
@ -374,33 +374,33 @@ that MPI runs are performed in MCDRAM.
|
||||
|
||||
[Tuning for Offload Performance:]
|
||||
|
||||
The default settings for offload should give good performance.
|
||||
The default settings for offload should give good performance.
|
||||
|
||||
When using LAMMPS with offload to Intel coprocessors, best performance
|
||||
will typically be achieved with concurrent calculations performed on
|
||||
both the CPU and the coprocessor. This is achieved by offloading only
|
||||
a fraction of the neighbor and pair computations to the coprocessor or
|
||||
using "hybrid"_pair_hybrid.html pair styles where only one style uses
|
||||
the "intel" suffix. For simulations with long-range electrostatics or
|
||||
bond, angle, dihedral, improper calculations, computation and data
|
||||
transfer to the coprocessor will run concurrently with computations
|
||||
the "intel" suffix. For simulations with long-range electrostatics or
|
||||
bond, angle, dihedral, improper calculations, computation and data
|
||||
transfer to the coprocessor will run concurrently with computations
|
||||
and MPI communications for these calculations on the host CPU. This
|
||||
is illustrated in the figure below for the rhodopsin protein benchmark
|
||||
running on E5-2697v2 processors with a Intel Xeon Phi 7120p
|
||||
running on E5-2697v2 processors with a Intel Xeon Phi 7120p
|
||||
coprocessor. In this plot, the vertical access is time and routines
|
||||
running at the same time are running concurrently on both the host and
|
||||
the coprocessor.
|
||||
|
||||
:c,image(JPG/offload_knc.png)
|
||||
|
||||
The fraction of the offloaded work is controlled by the {balance}
|
||||
keyword in the "package intel"_package.html command. A balance of 0
|
||||
runs all calculations on the CPU. A balance of 1 runs all
|
||||
supported calculations on the coprocessor. A balance of 0.5 runs half
|
||||
of the calculations on the coprocessor. Setting the balance to -1
|
||||
(the default) will enable dynamic load balancing that continously
|
||||
adjusts the fraction of offloaded work throughout the simulation.
|
||||
Because data transfer cannot be timed, this option typically produces
|
||||
The fraction of the offloaded work is controlled by the {balance}
|
||||
keyword in the "package intel"_package.html command. A balance of 0
|
||||
runs all calculations on the CPU. A balance of 1 runs all
|
||||
supported calculations on the coprocessor. A balance of 0.5 runs half
|
||||
of the calculations on the coprocessor. Setting the balance to -1
|
||||
(the default) will enable dynamic load balancing that continously
|
||||
adjusts the fraction of offloaded work throughout the simulation.
|
||||
Because data transfer cannot be timed, this option typically produces
|
||||
results within 5 to 10 percent of the optimal fixed balance.
|
||||
|
||||
If running short benchmark runs with dynamic load balancing, adding a
|
||||
@ -418,15 +418,15 @@ with 60 cores available for offload and 4 hardware threads per core
|
||||
each MPI task to use a subset of 10 threads on the coprocessor. Fine
|
||||
tuning of the number of threads to use per MPI task or the number of
|
||||
threads to use per core can be accomplished with keyword settings of
|
||||
the "package intel"_package.html command.
|
||||
the "package intel"_package.html command.
|
||||
|
||||
The USER-INTEL package has two modes for deciding which atoms will be
|
||||
handled by the coprocessor. This choice is controlled with the {ghost}
|
||||
keyword of the "package intel"_package.html command. When set to 0,
|
||||
ghost atoms (atoms at the borders between MPI tasks) are not offloaded
|
||||
to the card. This allows for overlap of MPI communication of forces
|
||||
with computation on the coprocessor when the "newton"_newton.html
|
||||
setting is "on". The default is dependent on the style being used,
|
||||
The USER-INTEL package has two modes for deciding which atoms will be
|
||||
handled by the coprocessor. This choice is controlled with the {ghost}
|
||||
keyword of the "package intel"_package.html command. When set to 0,
|
||||
ghost atoms (atoms at the borders between MPI tasks) are not offloaded
|
||||
to the card. This allows for overlap of MPI communication of forces
|
||||
with computation on the coprocessor when the "newton"_newton.html
|
||||
setting is "on". The default is dependent on the style being used,
|
||||
however, better performance may be achieved by setting this option
|
||||
explictly.
|
||||
|
||||
@ -442,10 +442,10 @@ mode is being used and indicating the number of coprocessor threads
|
||||
per MPI task. Additionally, an offload timing summary is printed at
|
||||
the end of each run. When offloading, the frequency for "atom
|
||||
sorting"_atom_modify.html is changed to 1 so that the per-atom data is
|
||||
effectively sorted at every rebuild of the neighbor lists. All the
|
||||
available coprocessor threads on each Phi will be divided among MPI
|
||||
tasks, unless the {tptask} option of the "-pk intel" "command-line
|
||||
switch"_Section_start.html#start_7 is used to limit the coprocessor
|
||||
effectively sorted at every rebuild of the neighbor lists. All the
|
||||
available coprocessor threads on each Phi will be divided among MPI
|
||||
tasks, unless the {tptask} option of the "-pk intel" "command-line
|
||||
switch"_Section_start.html#start_7 is used to limit the coprocessor
|
||||
threads per MPI task.
|
||||
|
||||
[Restrictions:]
|
||||
|
||||
@ -65,7 +65,7 @@ Make.py -v -p kokkos -kokkos omp -o mpi -a file mpi # or one-line build via Ma
|
||||
|
||||
mpirun -np 16 lmp_mpi -k on -sf kk -in in.lj # 1 node, 16 MPI tasks/node, no threads
|
||||
mpirun -np 2 -ppn 1 lmp_mpi -k on t 16 -sf kk -in in.lj # 2 nodes, 1 MPI task/node, 16 threads/task
|
||||
mpirun -np 2 lmp_mpi -k on t 8 -sf kk -in in.lj # 1 node, 2 MPI tasks/node, 8 threads/task
|
||||
mpirun -np 2 lmp_mpi -k on t 8 -sf kk -in in.lj # 1 node, 2 MPI tasks/node, 8 threads/task
|
||||
mpirun -np 32 -ppn 4 lmp_mpi -k on t 4 -sf kk -in in.lj # 8 nodes, 4 MPI tasks/node, 4 threads/task :pre
|
||||
|
||||
specify variables and settings in your Makefile.machine that enable OpenMP, GPU, or Phi support
|
||||
@ -156,23 +156,29 @@ CPU-only (run all-MPI or with OpenMP threading):
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make g++ KOKKOS_DEVICES=OpenMP :pre
|
||||
make kokkos_omp :pre
|
||||
|
||||
Intel Xeon Phi:
|
||||
CPU-only (only MPI, no threading):
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make g++ KOKKOS_DEVICES=OpenMP KOKKOS_ARCH=KNC :pre
|
||||
make kokkos_mpi :pre
|
||||
|
||||
CPUs and GPUs:
|
||||
Intel Xeon Phi (Intel Compiler, Intel MPI):
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make cuda KOKKOS_DEVICES=Cuda :pre
|
||||
make kokkos_phi :pre
|
||||
|
||||
CPUs and GPUs (with MPICH):
|
||||
|
||||
cd lammps/src
|
||||
make yes-kokkos
|
||||
make kokkos_cuda_mpich :pre
|
||||
|
||||
These examples set the KOKKOS-specific OMP, MIC, CUDA variables on the
|
||||
make command line which requires a GNU-compatible make command. Try
|
||||
"gmake" if your system's standard make complains.
|
||||
"gmake" if your system's standard make complains.
|
||||
|
||||
NOTE: If you build using make line variables and re-build LAMMPS twice
|
||||
with different KOKKOS options and the *same* target, e.g. g++ in the
|
||||
@ -180,26 +186,6 @@ first two examples above, then you *must* perform a "make clean-all"
|
||||
or "make clean-machine" before each build. This is to force all the
|
||||
KOKKOS-dependent files to be re-compiled with the new options.
|
||||
|
||||
You can also hardwire these make variables in the specified machine
|
||||
makefile, e.g. src/MAKE/Makefile.g++ in the first two examples above,
|
||||
with a line like:
|
||||
|
||||
KOKKOS_ARCH = KNC :pre
|
||||
|
||||
Note that if you build LAMMPS multiple times in this manner, using
|
||||
different KOKKOS options (defined in different machine makefiles), you
|
||||
do not have to worry about doing a "clean" in between. This is
|
||||
because the targets will be different.
|
||||
|
||||
NOTE: The 3rd example above for a GPU, uses a different machine
|
||||
makefile, in this case src/MAKE/Makefile.cuda, which is included in
|
||||
the LAMMPS distribution. To build the KOKKOS package for a GPU, this
|
||||
makefile must use the NVIDA "nvcc" compiler. And it must have a
|
||||
KOKKOS_ARCH setting that is appropriate for your NVIDIA hardware and
|
||||
installed software. Typical values for KOKKOS_ARCH are given below,
|
||||
as well as other settings that must be included in the machine
|
||||
makefile, if you create your own.
|
||||
|
||||
NOTE: Currently, there are no precision options with the KOKKOS
|
||||
package. All compilation and computation is performed in double
|
||||
precision.
|
||||
@ -246,7 +232,7 @@ used if running with KOKKOS_DEVICES=Pthreads for pthreads. It is not
|
||||
necessary for KOKKOS_DEVICES=OpenMP for OpenMP, because OpenMP
|
||||
provides alternative methods via environment variables for binding
|
||||
threads to hardware cores. More info on binding threads to cores is
|
||||
given in "this section"_Section_accelerate.html#acc_3.
|
||||
given in "Section 5.3"_Section_accelerate.html#acc_3.
|
||||
|
||||
KOKKOS_ARCH=KNC enables compiler switches needed when compling for an
|
||||
Intel Phi processor.
|
||||
@ -408,7 +394,7 @@ additional parallelism (beyond MPI) will be invoked on the host
|
||||
CPU(s).
|
||||
|
||||
You can compare the performance running in different modes:
|
||||
|
||||
|
||||
run with 1 MPI task/node and N threads/task
|
||||
run with N MPI tasks/node and 1 thread/task
|
||||
run with settings in between these extremes :ul
|
||||
@ -441,7 +427,7 @@ e.g. src/MAKE/Makefile.cuda, is correct for your GPU hardware/software
|
||||
details).
|
||||
|
||||
The -np setting of the mpirun command should set the number of MPI
|
||||
tasks/node to be equal to the # of physical GPUs on the node.
|
||||
tasks/node to be equal to the # of physical GPUs on the node.
|
||||
|
||||
Use the "-k" "command-line switch"_Section_commands.html#start_7 to
|
||||
specify the number of GPUs per node, and the number of threads per MPI
|
||||
|
||||
@ -7,7 +7,7 @@
|
||||
|
||||
:line
|
||||
|
||||
"Return to Section accelerate overview"_Section_accelerate.html
|
||||
"Return to Section 5 overview"_Section_accelerate.html
|
||||
|
||||
5.3.4 USER-OMP package :h5
|
||||
|
||||
@ -96,15 +96,15 @@ variable.
|
||||
|
||||
Depending on which styles are accelerated, you should look for a
|
||||
reduction in the "Pair time", "Bond time", "KSpace time", and "Loop
|
||||
time" values printed at the end of a run.
|
||||
time" values printed at the end of a run.
|
||||
|
||||
You may see a small performance advantage (5 to 20%) when running a
|
||||
USER-OMP style (in serial or parallel) with a single thread per MPI
|
||||
task, versus running standard LAMMPS with its standard un-accelerated
|
||||
styles (in serial or all-MPI parallelization with 1 task/core). This
|
||||
is because many of the USER-OMP styles contain similar optimizations
|
||||
to those used in the OPT package, described in "Section accelerate
|
||||
5.3.6"_accelerate_opt.html.
|
||||
to those used in the OPT package, described in "Section
|
||||
5.3.5"_accelerate_opt.html.
|
||||
|
||||
With multiple threads/task, the optimal choice of number of MPI
|
||||
tasks/node and OpenMP threads/task can vary a lot and should always be
|
||||
|
||||
@ -74,7 +74,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -61,7 +61,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -66,7 +66,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -74,7 +74,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -66,7 +66,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -21,11 +21,11 @@ angle_coeff 6 2.1 180.0 :pre
|
||||
[Description:]
|
||||
|
||||
The {dipole} angle style is used to control the orientation of a dipolar
|
||||
atom within a molecule "(Orsi)"_#Orsi. Specifically, the {dipole} angle
|
||||
style restrains the orientation of a point dipole mu_j (embedded in atom
|
||||
'j') with respect to a reference (bond) vector r_ij = r_i - r_j, where 'i'
|
||||
is another atom of the same molecule (typically, 'i' and 'j' are also
|
||||
covalently bonded).
|
||||
atom within a molecule "(Orsi)"_#Orsi. Specifically, the {dipole} angle
|
||||
style restrains the orientation of a point dipole mu_j (embedded in atom
|
||||
'j') with respect to a reference (bond) vector r_ij = r_i - r_j, where 'i'
|
||||
is another atom of the same molecule (typically, 'i' and 'j' are also
|
||||
covalently bonded).
|
||||
|
||||
It is convenient to define an angle gamma between the 'free' vector mu_j
|
||||
and the reference (bond) vector r_ij:
|
||||
@ -37,21 +37,21 @@ The {dipole} angle style uses the potential:
|
||||
:c,image(Eqs/angle_dipole_potential.jpg)
|
||||
|
||||
where K is a rigidity constant and gamma0 is an equilibrium (reference)
|
||||
angle.
|
||||
angle.
|
||||
|
||||
The torque on the dipole can be obtained by differentiating the
|
||||
potential using the 'chain rule' as in appendix C.3 of
|
||||
The torque on the dipole can be obtained by differentiating the
|
||||
potential using the 'chain rule' as in appendix C.3 of
|
||||
"(Allen)"_#Allen:
|
||||
|
||||
:c,image(Eqs/angle_dipole_torque.jpg)
|
||||
|
||||
Example: if gamma0 is set to 0 degrees, the torque generated by
|
||||
the potential will tend to align the dipole along the reference
|
||||
the potential will tend to align the dipole along the reference
|
||||
direction defined by the (bond) vector r_ij (in other words, mu_j is
|
||||
restrained to point towards atom 'i').
|
||||
|
||||
The dipolar torque T_j must be counterbalanced in order to conserve
|
||||
the local angular momentum. This is achieved via an additional force
|
||||
The dipolar torque T_j must be counterbalanced in order to conserve
|
||||
the local angular momentum. This is achieved via an additional force
|
||||
couple generating a torque equivalent to the opposite of T_j:
|
||||
|
||||
:c,image(Eqs/angle_dipole_couple.jpg)
|
||||
@ -118,7 +118,7 @@ This angle style should not be used with SHAKE.
|
||||
:line
|
||||
|
||||
:link(Orsi)
|
||||
[(Orsi)] Orsi & Essex, The ELBA force field for coarse-grain modeling of
|
||||
[(Orsi)] Orsi & Essex, The ELBA force field for coarse-grain modeling of
|
||||
lipid membranes, PloS ONE 6(12): e28637, 2011.
|
||||
|
||||
:link(Allen)
|
||||
|
||||
@ -62,7 +62,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
USER_MISC package. See the "Making LAMMPS"_Section_start.html#start_3
|
||||
USER_MISC package. See the "Making LAMMPS"_Section_start.html#start_3
|
||||
section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -61,7 +61,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
USER_MISC package. See the "Making LAMMPS"_Section_start.html#start_3
|
||||
USER_MISC package. See the "Making LAMMPS"_Section_start.html#start_3
|
||||
section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -65,11 +65,11 @@ more instructions on how to use the accelerated styles effectively.
|
||||
|
||||
:line
|
||||
|
||||
[Restrictions:] none
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
MOLECULE package. See the "Making LAMMPS"_Section_start.html#start_3
|
||||
section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
|
||||
@ -76,7 +76,7 @@ for specific angle types.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
Unlike other angle styles, the hybrid angle style does not store angle
|
||||
|
||||
@ -68,7 +68,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
USER_MISC package. See the "Making LAMMPS"_Section_start.html#start_3
|
||||
USER_MISC package. See the "Making LAMMPS"_Section_start.html#start_3
|
||||
section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -43,7 +43,7 @@ internally; hence the units of K are in energy/radian^2.
|
||||
The also required {lj/sdk} parameters will be extracted automatically
|
||||
from the pair_style.
|
||||
|
||||
[Restrictions:]
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
USER-CG-CMM package. See the "Making
|
||||
|
||||
@ -147,7 +147,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This angle style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS
|
||||
"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS
|
||||
Commands"_lc :c
|
||||
|
||||
:link(lws,http://lammps.sandia.gov)
|
||||
@ -156,12 +156,12 @@ used with a group-ID that is not "all".
|
||||
|
||||
[Default:]
|
||||
|
||||
By default, {id} is yes. By default, atomic systems (no bond topology
|
||||
info) do not use a map. For molecular systems (with bond topology
|
||||
info), a map is used. The default map style is array if no atom ID is
|
||||
larger than 1 million, otherwise the default is hash. By default, a
|
||||
"first" group is not defined. By default, sorting is enabled with a
|
||||
frequency of 1000 and a binsize of 0.0, which means the neighbor
|
||||
By default, {id} is yes. By default, atomic systems (no bond topology
|
||||
info) do not use a map. For molecular systems (with bond topology
|
||||
info), a map is used. The default map style is array if no atom ID is
|
||||
larger than 1 million, otherwise the default is hash. By default, a
|
||||
"first" group is not defined. By default, sorting is enabled with a
|
||||
frequency of 1000 and a binsize of 0.0, which means the neighbor
|
||||
cutoff will be used to set the bin size.
|
||||
|
||||
:line
|
||||
|
||||
@ -14,7 +14,7 @@ atom_style style args :pre
|
||||
|
||||
style = {angle} or {atomic} or {body} or {bond} or {charge} or {dipole} or \
|
||||
{dpd} or {electron} or {ellipsoid} or {full} or {line} or {meso} or \
|
||||
{molecular} or {peri} or {smd} or {sphere} or {tri} or \
|
||||
{molecular} or {peri} or {smd} or {sphere} or {tri} or \
|
||||
{template} or {hybrid} :ulb,l
|
||||
args = none for any style except the following
|
||||
{body} args = bstyle bstyle-args
|
||||
@ -166,7 +166,7 @@ stores a per-particle mass and size and orientation (i.e. the corner
|
||||
points of the triangle).
|
||||
|
||||
The {template} style allows molecular topolgy (bonds,angles,etc) to be
|
||||
defined via a molecule template using the "molecule"_molecule.txt
|
||||
defined via a molecule template using the "molecule"_molecule.html
|
||||
command. The template stores one or more molecules with a single copy
|
||||
of the topology info (bonds,angles,etc) of each. Individual atoms
|
||||
only store a template index and template atom to identify which
|
||||
@ -193,7 +193,7 @@ For the {body} style, the particles are arbitrary bodies with internal
|
||||
attributes defined by the "style" of the bodies, which is specified by
|
||||
the {bstyle} argument. Body particles can represent complex entities,
|
||||
such as surface meshes of discrete points, collections of
|
||||
sub-particles, deformable objects, etc.
|
||||
sub-particles, deformable objects, etc.
|
||||
|
||||
The "body"_body.html doc page descibes the body styles LAMMPS
|
||||
currently supports, and provides more details as to the kind of body
|
||||
@ -269,7 +269,7 @@ The {line} and {tri} styles are part of the ASPHERE package.
|
||||
|
||||
The {body} style is part of the BODY package.
|
||||
|
||||
The {dipole} style is part of the DIPOLE package.
|
||||
The {dipole} style is part of the DIPOLE package.
|
||||
|
||||
The {peri} style is part of the PERI package for Peridynamics.
|
||||
|
||||
|
||||
@ -10,7 +10,7 @@ balance command :h3
|
||||
|
||||
[Syntax:]
|
||||
|
||||
balance thresh style args ... keyword value ... :pre
|
||||
balance thresh style args ... keyword args ... :pre
|
||||
|
||||
thresh = imbalance threshhold that must be exceeded to perform a re-balance :ulb,l
|
||||
one style/arg pair can be used (or multiple for {x},{y},{z}) :l
|
||||
@ -32,9 +32,23 @@ style = {x} or {y} or {z} or {shift} or {rcb} :l
|
||||
Niter = # of times to iterate within each dimension of dimstr sequence
|
||||
stopthresh = stop balancing when this imbalance threshhold is reached
|
||||
{rcb} args = none :pre
|
||||
zero or more keyword/value pairs may be appended :l
|
||||
keyword = {out} :l
|
||||
{out} value = filename
|
||||
zero or more keyword/arg pairs may be appended :l
|
||||
keyword = {weight} or {out} :l
|
||||
{weight} style args = use weighted particle counts for the balancing
|
||||
{style} = {group} or {neigh} or {time} or {var} or {store}
|
||||
{group} args = Ngroup group1 weight1 group2 weight2 ...
|
||||
Ngroup = number of groups with assigned weights
|
||||
group1, group2, ... = group IDs
|
||||
weight1, weight2, ... = corresponding weight factors
|
||||
{neigh} factor = compute weight based on number of neighbors
|
||||
factor = scaling factor (> 0)
|
||||
{time} factor = compute weight based on time spend computing
|
||||
factor = scaling factor (> 0)
|
||||
{var} name = take weight from atom-style variable
|
||||
name = name of the atom-style variable
|
||||
{store} name = store weight in custom atom property defined by "fix property/atom"_fix_property_atom.html command
|
||||
name = atom property name (without d_ prefix)
|
||||
{out} arg = filename
|
||||
filename = write each processor's sub-domain to a file :pre
|
||||
:ule
|
||||
|
||||
@ -44,28 +58,42 @@ balance 0.9 x uniform y 0.4 0.5 0.6
|
||||
balance 1.2 shift xz 5 1.1
|
||||
balance 1.0 shift xz 5 1.1
|
||||
balance 1.1 rcb
|
||||
balance 1.0 shift x 10 1.1 weight group 2 fast 0.5 slow 2.0
|
||||
balance 1.0 shift x 10 1.1 weight time 0.8 weight neigh 0.5 weight store balance
|
||||
balance 1.0 shift x 20 1.0 out tmp.balance :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
This command adjusts the size and shape of processor sub-domains
|
||||
within the simulation box, to attempt to balance the number of
|
||||
particles and thus the computational cost (load) evenly across
|
||||
processors. The load balancing is "static" in the sense that this
|
||||
command performs the balancing once, before or between simulations.
|
||||
The processor sub-domains will then remain static during the
|
||||
subsequent run. To perform "dynamic" balancing, see the "fix
|
||||
within the simulation box, to attempt to balance the number of atoms
|
||||
or particles and thus indirectly the computational cost (load) more
|
||||
evenly across processors. The load balancing is "static" in the sense
|
||||
that this command performs the balancing once, before or between
|
||||
simulations. The processor sub-domains will then remain static during
|
||||
the subsequent run. To perform "dynamic" balancing, see the "fix
|
||||
balance"_fix_balance.html command, which can adjust processor
|
||||
sub-domain sizes and shapes on-the-fly during a "run"_run.html.
|
||||
|
||||
Load-balancing is typically only useful if the particles in the
|
||||
simulation box have a spatially-varying density distribution. E.g. a
|
||||
model of a vapor/liquid interface, or a solid with an irregular-shaped
|
||||
geometry containing void regions. In this case, the LAMMPS default of
|
||||
Load-balancing is typically most useful if the particles in the
|
||||
simulation box have a spatially-varying density distribution or when
|
||||
the computational cost varies signficantly between different
|
||||
particles. E.g. a model of a vapor/liquid interface, or a solid with
|
||||
an irregular-shaped geometry containing void regions, or "hybrid pair
|
||||
style simulations"_pair_hybrid.html which combine pair styles with
|
||||
different computational cost. In these cases, the LAMMPS default of
|
||||
dividing the simulation box volume into a regular-spaced grid of 3d
|
||||
bricks, with one equal-volume sub-domain per procesor, may assign very
|
||||
different numbers of particles per processor. This can lead to poor
|
||||
performance when the simulation is run in parallel.
|
||||
bricks, with one equal-volume sub-domain per procesor, may assign
|
||||
numbers of particles per processor in a way that the computational
|
||||
effort varies significantly. This can lead to poor performance when
|
||||
the simulation is run in parallel.
|
||||
|
||||
The balancing can be performed with or without per-particle weighting.
|
||||
With no weighting, the balancing attempts to assign an equal number of
|
||||
particles to each processor. With weighting, the balancing attempts
|
||||
to assign an equal aggregate computational weight to each processor,
|
||||
which typically inducces a diffrent number of atoms assigned to each
|
||||
processor. Details on the various weighting options and examples for
|
||||
how they can be used are "given below"_#weighted_balance.
|
||||
|
||||
Note that the "processors"_processors.html command allows some control
|
||||
over how the box volume is split across processors. Specifically, for
|
||||
@ -78,9 +106,9 @@ sub-domains will still have the same shape and same volume.
|
||||
The requested load-balancing operation is only performed if the
|
||||
current "imbalance factor" in particles owned by each processor
|
||||
exceeds the specified {thresh} parameter. The imbalance factor is
|
||||
defined as the maximum number of particles owned by any processor,
|
||||
divided by the average number of particles per processor. Thus an
|
||||
imbalance factor of 1.0 is perfect balance.
|
||||
defined as the maximum number of particles (or weight) owned by any
|
||||
processor, divided by the average number of particles (or weight) per
|
||||
processor. Thus an imbalance factor of 1.0 is perfect balance.
|
||||
|
||||
As an example, for 10000 particles running on 10 processors, if the
|
||||
most heavily loaded processor has 1200 particles, then the factor is
|
||||
@ -108,7 +136,7 @@ defined above. But depending on the method a perfect balance (1.0)
|
||||
may not be achieved. For example, "grid" methods (defined below) that
|
||||
create a logical 3d grid cannot achieve perfect balance for many
|
||||
irregular distributions of particles. Likewise, if a portion of the
|
||||
system is a perfect lattice, e.g. the intiial system is generated by
|
||||
system is a perfect lattice, e.g. the initial system is generated by
|
||||
the "create_atoms"_create_atoms.html command, then "grid" methods may
|
||||
be unable to achieve exact balance. This is because entire lattice
|
||||
planes will be owned or not owned by a single processor.
|
||||
@ -134,11 +162,11 @@ The {x}, {y}, {z}, and {shift} styles are "grid" methods which produce
|
||||
a logical 3d grid of processors. They operate by changing the cutting
|
||||
planes (or lines) between processors in 3d (or 2d), to adjust the
|
||||
volume (area in 2d) assigned to each processor, as in the following 2d
|
||||
diagram where processor sub-domains are shown and atoms are colored by
|
||||
the processor that owns them. The leftmost diagram is the default
|
||||
partitioning of the simulation box across processors (one sub-box for
|
||||
each of 16 processors); the middle diagram is after a "grid" method
|
||||
has been applied.
|
||||
diagram where processor sub-domains are shown and particles are
|
||||
colored by the processor that owns them. The leftmost diagram is the
|
||||
default partitioning of the simulation box across processors (one
|
||||
sub-box for each of 16 processors); the middle diagram is after a
|
||||
"grid" method has been applied.
|
||||
|
||||
:image(JPG/balance_uniform_small.jpg,JPG/balance_uniform.jpg),image(JPG/balance_nonuniform_small.jpg,JPG/balance_nonuniform.jpg),image(JPG/balance_rcb_small.jpg,JPG/balance_rcb.jpg)
|
||||
:c
|
||||
@ -146,8 +174,8 @@ has been applied.
|
||||
The {rcb} style is a "tiling" method which does not produce a logical
|
||||
3d grid of processors. Rather it tiles the simulation domain with
|
||||
rectangular sub-boxes of varying size and shape in an irregular
|
||||
fashion so as to have equal numbers of particles in each sub-box, as
|
||||
in the rightmost diagram above.
|
||||
fashion so as to have equal numbers of particles (or weight) in each
|
||||
sub-box, as in the rightmost diagram above.
|
||||
|
||||
The "grid" methods can be used with either of the
|
||||
"comm_style"_comm_style.html command options, {brick} or {tiled}. The
|
||||
@ -230,7 +258,7 @@ counts do not match the target value for the plane, the position of
|
||||
the cut is adjusted to be halfway between a low and high bound. The
|
||||
low and high bounds are adjusted on each iteration, using new count
|
||||
information, so that they become closer together over time. Thus as
|
||||
the recustion progresses, the count of particles on either side of the
|
||||
the recursion progresses, the count of particles on either side of the
|
||||
plane gets closer to the target value.
|
||||
|
||||
Once the rebalancing is complete and final processor sub-domains
|
||||
@ -262,21 +290,155 @@ the longest dimension, leaving one new box on either side of the cut.
|
||||
All the processors are also partitioned into 2 groups, half assigned
|
||||
to the box on the lower side of the cut, and half to the box on the
|
||||
upper side. (If the processor count is odd, one side gets an extra
|
||||
processor.) The cut is positioned so that the number of atoms in the
|
||||
lower box is exactly the number that the processors assigned to that
|
||||
box should own for load balance to be perfect. This also makes load
|
||||
balance for the upper box perfect. The positioning is done
|
||||
iteratively, by a bisectioning method. Note that counting atoms on
|
||||
either side of the cut requires communication between all processors
|
||||
at each iteration.
|
||||
processor.) The cut is positioned so that the number of particles in
|
||||
the lower box is exactly the number that the processors assigned to
|
||||
that box should own for load balance to be perfect. This also makes
|
||||
load balance for the upper box perfect. The positioning is done
|
||||
iteratively, by a bisectioning method. Note that counting particles
|
||||
on either side of the cut requires communication between all
|
||||
processors at each iteration.
|
||||
|
||||
That is the procedure for the first cut. Subsequent cuts are made
|
||||
recursively, in exactly the same manner. The subset of processors
|
||||
assigned to each box make a new cut in the longest dimension of that
|
||||
box, splitting the box, the subset of processsors, and the atoms in
|
||||
the box in two. The recursion continues until every processor is
|
||||
assigned a sub-box of the entire simulation domain, and owns the atoms
|
||||
in that sub-box.
|
||||
box, splitting the box, the subset of processsors, and the particles
|
||||
in the box in two. The recursion continues until every processor is
|
||||
assigned a sub-box of the entire simulation domain, and owns the
|
||||
particles in that sub-box.
|
||||
|
||||
:line
|
||||
|
||||
This sub-section describes how to perform weighted load balancing
|
||||
using the {weight} keyword. :link(weighted_balance)
|
||||
|
||||
By default, all particles have a weight of 1.0, which means each
|
||||
particle is assumed to require the same amount of computation during a
|
||||
timestep. There are, however, scenarios where this is not a good
|
||||
assumption. Measuring the computational cost for each particle
|
||||
accurately would be impractical and slow down the computation.
|
||||
Instead the {weight} keyword implements several ways to influence the
|
||||
per-particle weights empirically by properties readily available or
|
||||
using the user's knowledge of the system. Note that the absolute
|
||||
value of the weights are not important; only their relative ratios
|
||||
affect which particle is assigned to which processor. A particle with
|
||||
a weight of 2.5 is assumed to require 5x more computational than a
|
||||
particle with a weight of 0.5. For all the options below the weight
|
||||
assigned to a particle must be a positive value; an error will be be
|
||||
generated if a weight is <= 0.0.
|
||||
|
||||
Below is a list of possible weight options with a short description of
|
||||
their usage and some example scenarios where they might be applicable.
|
||||
It is possible to apply multiple weight flags and the weightings they
|
||||
induce will be combined through multiplication. Most of the time,
|
||||
however, it is sufficient to use just one method.
|
||||
|
||||
The {group} weight style assigns weight factors to specified
|
||||
"groups"_group.html of particles. The {group} style keyword is
|
||||
followed by the number of groups, then pairs of group IDs and the
|
||||
corresponding weight factor. If a particle belongs to none of the
|
||||
specified groups, its weight is not changed. If it belongs to
|
||||
multiple groups, its weight is the product of the weight factors.
|
||||
|
||||
This weight style is useful in combination with pair style
|
||||
"hybrid"_pair_hybrid.html, e.g. when combining a more costly manybody
|
||||
potential with a fast pair-wise potential. It is also useful when
|
||||
using "run_style respa"_run_style.html where some portions of the
|
||||
system have many bonded interactions and others none. It assumes that
|
||||
the computational cost for each group remains constant over time.
|
||||
This is a purely empirical weighting, so a series test runs to tune
|
||||
the assigned weight factors for optimal performance is recommended.
|
||||
|
||||
The {neigh} weight style assigns the same weight to each particle
|
||||
owned by a processor based on the total count of neighbors in the
|
||||
neighbor list owned by that processor. The motivation is that more
|
||||
neighbors means a higher computational cost. The style does not use
|
||||
neighbors per atom to assign a unique weight to each atom, because
|
||||
that value can vary depending on how the neighbor list is built.
|
||||
|
||||
The {factor} setting is applied as an overall scale factor to the
|
||||
{neigh} weights which allows adjustment of their impact on the
|
||||
balancing operation. The specified {factor} value must be positive.
|
||||
A value > 1.0 will increase the weights so that the ratio of max
|
||||
weight to min weight increases by {factor}. A value < 1.0 will
|
||||
decrease the weights so that the ratio of max weight to min weight
|
||||
decreases by {factor}. In both cases the intermediate weight values
|
||||
increase/decrease proportionally as well. A value = 1.0 has no effect
|
||||
on the {neigh} weights. As a rule of thumb, we have found a {factor}
|
||||
of about 0.8 often results in the best performance, since the number
|
||||
of neighbors is likely to overestimate the ideal weight.
|
||||
|
||||
This weight style is useful for systems where there are different
|
||||
cutoffs used for different pairs of interations, or the density
|
||||
fluctuates, or a large number of particles are in the vicinity of a
|
||||
wall, or a combination of these effects. If a simulation uses
|
||||
multiple neighbor lists, this weight style will use the first suitable
|
||||
neighbor list it finds. It will not request or compute a new list. A
|
||||
warning will be issued if there is no suitable neighbor list available
|
||||
or if it is not current, e.g. if the balance command is used before a
|
||||
"run"_run.html or "minimize"_minimize.html command is used, in which
|
||||
case the neighbor list may not yet have been built. In this case no
|
||||
weights are computed. Inserting a "run 0 post no"_run.html command
|
||||
before issuing the {balance} command, may be a workaround for this
|
||||
case, as it will induce the neighbor list to be built.
|
||||
|
||||
The {time} weight style uses "timer data"_timer.html to estimate
|
||||
weights. It assigns the same weight to each particle owned by a
|
||||
processor based on the total computational time spent by that
|
||||
processor. See details below on what time window is used. It uses
|
||||
the same timing information as is used for the "MPI task timing
|
||||
breakdown"_Section_start.html#start_8, namely, for sections {Pair},
|
||||
{Bond}, {Kspace}, and {Neigh}. The time spent in those portions of
|
||||
the timestep are measured for each MPI rank, summed, then divided by
|
||||
the number of particles owned by that processor. I.e. the weight is
|
||||
an effective CPU time/particle averaged over the particles on that
|
||||
processor.
|
||||
|
||||
The {factor} setting is applied as an overall scale factor to the
|
||||
{time} weights which allows adjustment of their impact on the
|
||||
balancing operation. The specified {factor} value must be positive.
|
||||
A value > 1.0 will increase the weights so that the ratio of max
|
||||
weight to min weight increases by {factor}. A value < 1.0 will
|
||||
decrease the weights so that the ratio of max weight to min weight
|
||||
decreases by {factor}. In both cases the intermediate weight values
|
||||
increase/decrease proportionally as well. A value = 1.0 has no effect
|
||||
on the {time} weights. As a rule of thumb, effective values to use
|
||||
are typicall between 0.5 and 1.2. Note that the timer quantities
|
||||
mentioned above can be affected by communication which occurs in the
|
||||
middle of the operations, e.g. pair styles with intermediate exchange
|
||||
of data witin the force computation, and likewise for KSpace solves.
|
||||
|
||||
When using the {time} weight style with the {balance} command, the
|
||||
timing data is taken from the preceding run command, i.e. the timings
|
||||
are for the entire previous run. For the {fix balance} command the
|
||||
timing data is for only the timesteps since the last balancing
|
||||
operation was performed. If timing information for the required
|
||||
sections is not available, e.g. at the beginning of a run, or when the
|
||||
"timer"_timer.html command is set to either {loop} or {off}, a warning
|
||||
is issued. In this case no weights are computed.
|
||||
|
||||
NOTE: The {time} weight style is the most generic option, and should
|
||||
be tried first, unless the {group} style is easily applicable.
|
||||
However, since the computed cost function is averaged over all
|
||||
particles on a processor, the weights may not be highly accurate.
|
||||
This style can also be effective as a secondary weight in combination
|
||||
with either {group} or {neigh} to offset some of inaccuracies in
|
||||
either of those heuristics.
|
||||
|
||||
The {var} weight style assigns per-particle weights by evaluating an
|
||||
"atom-style variable"_variable.html specified by {name}. This is
|
||||
provided as a more flexible alternative to the {group} weight style,
|
||||
allowing definition of a more complex heuristics based on information
|
||||
(global and per atom) available inside of LAMMPS. For example,
|
||||
atom-style variables can reference the position of a particle, its
|
||||
velocity, the volume of its Voronoi cell, etc.
|
||||
|
||||
The {store} weight style does not compute a weight factor. Instead it
|
||||
stores the current accumulated weights in a custom per-atom property
|
||||
specified by {name}. This must be a property defined as {d_name} via
|
||||
the "fix property/atom"_fix_property_atom.html command. Note that
|
||||
these custom per-atom properties can be output in a "dump"_dump.html
|
||||
file, so this is a way to examine, debug, or visualize the
|
||||
per-particle weights computed during the load-balancing operation.
|
||||
|
||||
:line
|
||||
|
||||
@ -328,7 +490,7 @@ per processor. Note that the 4 sub-domains share vertices, so there
|
||||
will be duplicate nodes in the list.
|
||||
|
||||
The "SQUARES" section lists the node IDs of the 4 vertices in a
|
||||
rectangle for each processor (1 to 4).
|
||||
rectangle for each processor (1 to 4).
|
||||
|
||||
For a 3d problem, the syntax is similar with 8 vertices listed for
|
||||
each processor, instead of 4, and "SQUARES" replaced by "CUBES".
|
||||
@ -342,6 +504,7 @@ appear in {dimstr} for the {shift} style.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
"processors"_processors.html, "fix balance"_fix_balance.html
|
||||
"group"_group.html, "processors"_processors.html,
|
||||
"fix balance"_fix_balance.html
|
||||
|
||||
[Default:] none
|
||||
|
||||
@ -125,7 +125,7 @@ in the {Bodies} section of the data file:
|
||||
|
||||
atom-ID 1 M
|
||||
N
|
||||
ixx iyy izz ixy ixz iyz
|
||||
ixx iyy izz ixy ixz iyz
|
||||
x1 y1 z1
|
||||
...
|
||||
xN yN zN :pre
|
||||
@ -198,11 +198,11 @@ in the {Bodies} section of the data file:
|
||||
|
||||
atom-ID 1 M
|
||||
N
|
||||
ixx iyy izz ixy ixz iyz
|
||||
ixx iyy izz ixy ixz iyz
|
||||
x1 y1 z1
|
||||
...
|
||||
xN yN zN
|
||||
i j j k k ...
|
||||
i j j k k ...
|
||||
radius :pre
|
||||
|
||||
N is the number of vertices in the body particle. M = 6 + 3*N + 2*N +
|
||||
@ -230,11 +230,11 @@ particles whose edge length is sqrt(2):
|
||||
|
||||
3 1 27
|
||||
4
|
||||
1 1 4 0 0 0
|
||||
-0.7071 -0.7071 0
|
||||
-0.7071 0.7071 0
|
||||
0.7071 0.7071 0
|
||||
0.7071 -0.7071 0
|
||||
1 1 4 0 0 0
|
||||
-0.7071 -0.7071 0
|
||||
-0.7071 0.7071 0
|
||||
0.7071 0.7071 0
|
||||
0.7071 -0.7071 0
|
||||
0 1 1 2 2 3 3 0
|
||||
1.0 :pre
|
||||
|
||||
|
||||
@ -70,10 +70,10 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
You typically should specify "special_bonds fene"_special_bonds.html"
|
||||
You typically should specify "special_bonds fene"_special_bonds.html
|
||||
or "special_bonds lj/coul 0 1 1"_special_bonds.html to use this bond
|
||||
style. LAMMPS will issue a warning it that's not the case.
|
||||
|
||||
|
||||
@ -73,10 +73,10 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
You typically should specify "special_bonds fene"_special_bonds.html"
|
||||
You typically should specify "special_bonds fene"_special_bonds.html
|
||||
or "special_bonds lj/coul 0 1 1"_special_bonds.html to use this bond
|
||||
style. LAMMPS will issue a warning it that's not the case.
|
||||
|
||||
|
||||
@ -65,7 +65,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -59,7 +59,7 @@ bond types.
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
Unlike other bond styles, the hybrid bond style does not store bond
|
||||
|
||||
@ -64,7 +64,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -64,7 +64,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -99,7 +99,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
The {quartic} style requires that "special_bonds"_special_bonds.html
|
||||
|
||||
@ -144,7 +144,7 @@ more instructions on how to use the accelerated styles effectively.
|
||||
[Restrictions:]
|
||||
|
||||
This bond style can only be used if LAMMPS was built with the
|
||||
MOLECULE package (which it is by default). See the "Making
|
||||
MOLECULE package. See the "Making
|
||||
LAMMPS"_Section_start.html#start_3 section for more info on packages.
|
||||
|
||||
[Related commands:]
|
||||
|
||||
@ -173,7 +173,7 @@ change_box all x scale 1.1 y volume z volume :pre
|
||||
|
||||
The {volume} style changes the associated dimension so that the
|
||||
overall box volume is unchanged relative to its value before the
|
||||
preceding keyword was invoked.
|
||||
preceding keyword was invoked.
|
||||
|
||||
If the following command is used, then the z box length will shrink by
|
||||
the same 1.1 factor the x box length was increased by:
|
||||
|
||||
@ -135,7 +135,7 @@ and angular momentum of a particle. If the {vel} option is set to
|
||||
{yes}, then ghost atoms store these quantities; if {no} then they do
|
||||
not. The {yes} setting is needed by some pair styles which require
|
||||
the velocity state of both the I and J particles to compute a pairwise
|
||||
I,J interaction.
|
||||
I,J interaction, as well as by some compute and fix commands.
|
||||
|
||||
Note that if the "fix deform"_fix_deform.html command is being used
|
||||
with its "remap v" option enabled, then the velocities for ghost atoms
|
||||
|
||||
@ -37,6 +37,7 @@ Commands :h1
|
||||
dump_image
|
||||
dump_modify
|
||||
dump_molfile
|
||||
dump_nc
|
||||
echo
|
||||
fix
|
||||
fix_modify
|
||||
|
||||
@ -114,7 +114,7 @@ local defects surrounding the central atom, as described above. For
|
||||
the {axes yes} case, the vector components are also unitless, since
|
||||
they represent spatial directions.
|
||||
|
||||
Here are typical centro-symmetry values, from a a nanoindentation
|
||||
Here are typical centro-symmetry values, from a nanoindentation
|
||||
simulation into gold (FCC). These were provided by Jon Zimmerman
|
||||
(Sandia):
|
||||
|
||||
|
||||
@ -536,7 +536,7 @@ For the {bin/cylinder} style the details are as follows. If {discard}
|
||||
is set to {yes}, an out-of-domain atom will have its chunk ID set to
|
||||
0. If {discard} is set to {no}, the atom will have its chunk ID set
|
||||
to the first or last bin in both the radial and axis dimensions. If
|
||||
{discard} is set to {mixed}, which is the default, the the radial
|
||||
{discard} is set to {mixed}, which is the default, the radial
|
||||
dimension is treated the same as for {discard} = no. But for the axis
|
||||
dimensinon, it will only have its chunk ID set to the first or last
|
||||
bin if bins extend to the simulation box boundary in the axis
|
||||
|
||||
@ -13,7 +13,7 @@ compute cna/atom command :h3
|
||||
compute ID group-ID cna/atom cutoff :pre
|
||||
|
||||
ID, group-ID are documented in "compute"_compute.html command
|
||||
cna/atom = style name of this compute command
|
||||
cna/atom = style name of this compute command
|
||||
cutoff = cutoff distance for nearest neighbors (distance units) :ul
|
||||
|
||||
[Examples:]
|
||||
|
||||
@ -63,4 +63,4 @@ LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
"compute damage/atom"_compute_damage_atom.html,
|
||||
"compute plasticity/atom"_compute_plasticity_atom.html
|
||||
|
||||
[Default:] none
|
||||
[Default:] none
|
||||
|
||||
@ -19,7 +19,7 @@ charge-correction = {mass} or {geometry}, use COM or geometric center for charge
|
||||
|
||||
[Examples:]
|
||||
|
||||
compute 1 fluid dipole/chunk molchunk
|
||||
compute 1 fluid dipole/chunk molchunk
|
||||
compute dw water dipole/chunk 1 geometry :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
@ -46,7 +46,7 @@ output options.
|
||||
|
||||
The vector values will be in energy and temperature "units"_units.html.
|
||||
|
||||
[Restrictions:]
|
||||
[Restrictions:]
|
||||
|
||||
This command is part of the USER-DPD package. It is only enabled if
|
||||
LAMMPS was built with that package. See the "Making
|
||||
@ -64,7 +64,7 @@ command.
|
||||
|
||||
:line
|
||||
|
||||
:link(Larentzos)
|
||||
:link(Larentzos)
|
||||
[(Larentzos)] J.P. Larentzos, J.K. Brennan, J.D. Moore, and
|
||||
W.D. Mattson, "LAMMPS Implementation of Constant Energy Dissipative
|
||||
Particle Dynamics (DPD-E)", ARL-TR-6863, U.S. Army Research
|
||||
|
||||
@ -22,7 +22,7 @@ compute 1 all dpd/atom
|
||||
[Description:]
|
||||
|
||||
Define a computation that accesses the per-particle internal
|
||||
conductive energy (u_cond), internal mechanical energy (u_mech),
|
||||
conductive energy (u_cond), internal mechanical energy (u_mech),
|
||||
internal chemical energy (u_chem) and
|
||||
internal temperatures (dpdTheta) for each particle in a group. See
|
||||
the "compute dpd"_compute_dpd.html command if you want the total
|
||||
@ -39,10 +39,10 @@ that uses per-particle values from a compute as input. See
|
||||
"Section 6.15"_Section_howto.html#howto_15 for an overview of
|
||||
LAMMPS output options.
|
||||
|
||||
The per-particle array values will be in energy (u_cond, u_mech, u_chem)
|
||||
The per-particle array values will be in energy (u_cond, u_mech, u_chem)
|
||||
and temperature (dpdTheta) "units"_units.html.
|
||||
|
||||
[Restrictions:]
|
||||
[Restrictions:]
|
||||
|
||||
This command is part of the USER-DPD package. It is only enabled if
|
||||
LAMMPS was built with that package. See the "Making
|
||||
|
||||
@ -26,7 +26,7 @@ Define a computation that flags an "event" if any particle in the
|
||||
group has moved a distance greater than the specified threshold
|
||||
distance when compared to a previously stored reference state
|
||||
(i.e. the previous event). This compute is typically used in
|
||||
conjunction with the "prd"_prd.html and "tad"_tad.html commands,
|
||||
conjunction with the "prd"_prd.html and "tad"_tad.html commands,
|
||||
to detect if a transition
|
||||
to a new minimum energy basin has occurred.
|
||||
|
||||
@ -34,8 +34,8 @@ This value calculated by the compute is equal to 0 if no particle has
|
||||
moved far enough, and equal to 1 if one or more particles have moved
|
||||
further than the threshold distance.
|
||||
|
||||
NOTE: If the system is undergoing significant center-of-mass motion,
|
||||
due to thermal motion, an external force, or an initial net momentum,
|
||||
NOTE: If the system is undergoing significant center-of-mass motion,
|
||||
due to thermal motion, an external force, or an initial net momentum,
|
||||
then this compute will not be able to distinguish that motion from
|
||||
local atom displacements and may generate "false postives."
|
||||
|
||||
|
||||
@ -64,7 +64,7 @@ these atoms:
|
||||
A coupling parameter \(\lambda\) varying from 0 to 1 connects the
|
||||
reference and perturbed systems:
|
||||
|
||||
:c,image(Eqs/compute_fep_lambda.jpg)
|
||||
:c,image(Eqs/compute_fep_lambda.jpg)
|
||||
|
||||
It is possible but not necessary that the coupling parameter (or a
|
||||
function thereof) appears as a multiplication factor of the potential
|
||||
@ -236,7 +236,7 @@ LAMMPS"_Section_start.html#start_3 section for more info.
|
||||
[Related commands:]
|
||||
|
||||
"fix adapt/fep"_fix_adapt_fep.html, "fix ave/time"_fix_ave_time.html,
|
||||
"pair_lj_soft_coul_soft"_pair_lj_soft_coul_soft.txt
|
||||
"pair_style lj/soft/coul/soft"_pair_lj_soft.html
|
||||
|
||||
[Default:]
|
||||
|
||||
|
||||
@ -28,7 +28,7 @@ compute 2 molecule gyration/chunk molchunk tensor :pre
|
||||
[Description:]
|
||||
|
||||
Define a computation that calculates the radius of gyration Rg for
|
||||
multiple chunks of atoms.
|
||||
multiple chunks of atoms.
|
||||
|
||||
In LAMMPS, chunks are collections of atoms defined by a "compute
|
||||
chunk/atom"_compute_chunk_atom.html command, which assigns each atom
|
||||
|
||||
@ -20,7 +20,7 @@ stress-ID = ID of a compute that calculates per-atom stress :ul
|
||||
|
||||
[Examples:]
|
||||
|
||||
compute myFlux all heat/flux myKE myPE myStress :pre
|
||||
compute myFlux all heat/flux myKE myPE myStress :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
@ -38,7 +38,7 @@ subtracted to a group of atoms.
|
||||
The compute takes three arguments which are IDs of other
|
||||
"computes"_compute.html. One calculates per-atom kinetic energy
|
||||
({ke-ID}), one calculates per-atom potential energy ({pe-ID)}, and the
|
||||
third calcualtes per-atom stress ({stress-ID}).
|
||||
third calcualtes per-atom stress ({stress-ID}).
|
||||
|
||||
NOTE: These other computes should provide values for all the atoms in
|
||||
the group this compute specifies. That means the other computes could
|
||||
@ -152,11 +152,11 @@ lattice fcc 5.376 orient x 1 0 0 orient y 0 1 0 orient z 0 0 1
|
||||
region box block 0 4 0 4 0 4
|
||||
create_box 1 box
|
||||
create_atoms 1 box
|
||||
mass 1 39.948
|
||||
mass 1 39.948
|
||||
pair_style lj/cut 13.0
|
||||
pair_coeff * * 0.2381 3.405
|
||||
timestep $\{dt\}
|
||||
thermo $d :pre
|
||||
thermo $d :pre
|
||||
|
||||
# equilibration and thermalization :pre
|
||||
|
||||
|
||||
@ -15,7 +15,7 @@ compute ID group-ID hexorder/atom keyword values ... :pre
|
||||
ID, group-ID are documented in "compute"_compute.html command :ulb,l
|
||||
hexorder/atom = style name of this compute command :l
|
||||
one or more keyword/value pairs may be appended :l
|
||||
keyword = {degree} or {nnn} or {cutoff}
|
||||
keyword = {degree} or {nnn} or {cutoff}
|
||||
{cutoff} value = distance cutoff
|
||||
{nnn} value = number of nearest neighbors
|
||||
{degree} value = degree {n} of order parameter :pre
|
||||
@ -24,27 +24,27 @@ keyword = {degree} or {nnn} or {cutoff}
|
||||
|
||||
[Examples:]
|
||||
|
||||
compute 1 all hexorder/atom
|
||||
compute 1 all hexorder/atom
|
||||
compute 1 all hexorder/atom degree 4 nnn 4 cutoff 1.2 :pre
|
||||
|
||||
[Description:]
|
||||
|
||||
Define a computation that calculates {qn} the bond-orientational
|
||||
order parameter for each atom in a group. The hexatic ({n} = 6) order
|
||||
Define a computation that calculates {qn} the bond-orientational
|
||||
order parameter for each atom in a group. The hexatic ({n} = 6) order
|
||||
parameter was introduced by "Nelson and Halperin"_#Nelson as a way to detect
|
||||
hexagonal symmetry in two-dimensional systems. For each atom, {qn}
|
||||
hexagonal symmetry in two-dimensional systems. For each atom, {qn}
|
||||
is a complex number (stored as two real numbers) defined as follows:
|
||||
|
||||
:c,image(Eqs/hexorder.jpg)
|
||||
|
||||
where the sum is over the {nnn} nearest neighbors
|
||||
where the sum is over the {nnn} nearest neighbors
|
||||
of the central atom. The angle theta
|
||||
is formed by the bond vector rij and the {x} axis. theta is calculated
|
||||
only using the {x} and {y} components, whereas the distance from the
|
||||
central atom is calculated using all three
|
||||
central atom is calculated using all three
|
||||
{x}, {y}, and {z} components of the bond vector.
|
||||
Neighbor atoms not in the group
|
||||
are included in the order parameter of atoms in the group.
|
||||
Neighbor atoms not in the group
|
||||
are included in the order parameter of atoms in the group.
|
||||
|
||||
The optional keyword {cutoff} defines the distance cutoff
|
||||
used when searching for neighbors. The default value, also
|
||||
@ -53,22 +53,22 @@ by the pair style.
|
||||
|
||||
The optional keyword {nnn} defines the number of nearest
|
||||
neighbors used to calculate {qn}. The default value is 6.
|
||||
If the value is NULL, then all neighbors up to the
|
||||
If the value is NULL, then all neighbors up to the
|
||||
distance cutoff are used.
|
||||
|
||||
The optional keyword {degree} sets the degree {n} of the order parameter.
|
||||
The default value is 6. For a perfect hexagonal lattice with
|
||||
The optional keyword {degree} sets the degree {n} of the order parameter.
|
||||
The default value is 6. For a perfect hexagonal lattice with
|
||||
{nnn} = 6,
|
||||
{q}6 = exp(6 i phi) for all atoms, where the constant 0 < phi < pi/3
|
||||
depends only on the orientation of the lattice relative to the {x} axis.
|
||||
In an isotropic liquid, local neighborhoods may still exhibit
|
||||
{q}6 = exp(6 i phi) for all atoms, where the constant 0 < phi < pi/3
|
||||
depends only on the orientation of the lattice relative to the {x} axis.
|
||||
In an isotropic liquid, local neighborhoods may still exhibit
|
||||
weak hexagonal symmetry, but because the orientational correlation
|
||||
decays quickly with distance, the value of phi will be different for
|
||||
different atoms, and so when {q}6 is averaged over all the atoms
|
||||
different atoms, and so when {q}6 is averaged over all the atoms
|
||||
in the system, \|<{q}6>\| << 1.
|
||||
|
||||
The value of {qn} is set to zero for atoms not in the
|
||||
specified compute group, as well as for atoms that have less than
|
||||
specified compute group, as well as for atoms that have less than
|
||||
{nnn} neighbors within the distance cutoff.
|
||||
|
||||
The neighbor list needed to compute this quantity is constructed each
|
||||
@ -92,7 +92,7 @@ the neighbor list.
|
||||
[Output info:]
|
||||
|
||||
This compute calculates a per-atom array with 2 columns, giving the
|
||||
real and imaginary parts {qn}, a complex number restricted to the
|
||||
real and imaginary parts {qn}, a complex number restricted to the
|
||||
unit disk of the complex plane i.e. Re({qn})^2 + Im({qn})^2 <= 1 .
|
||||
|
||||
These values can be accessed by any command that uses
|
||||
@ -106,7 +106,7 @@ options.
|
||||
|
||||
"compute orientorder/atom"_compute_orientorder_atom.html, "compute coord/atom"_compute_coord_atom.html, "compute centro/atom"_compute_centro_atom.html
|
||||
|
||||
[Default:]
|
||||
[Default:]
|
||||
|
||||
The option defaults are {cutoff} = pair style cutoff, {nnn} = 6, {degree} = 6
|
||||
|
||||
|
||||
@ -23,7 +23,7 @@ compute 1 fluid inertia/chunk molchunk :pre
|
||||
[Description:]
|
||||
|
||||
Define a computation that calculates the inertia tensor for multiple
|
||||
chunks of atoms.
|
||||
chunks of atoms.
|
||||
|
||||
In LAMMPS, chunks are collections of atoms defined by a "compute
|
||||
chunk/atom"_compute_chunk_atom.html command, which assigns each atom
|
||||
|
||||