LAMMPS (27 Nov 2018) using 1 OpenMP thread(s) per MPI task # 2d Lennard-Jones melt and subsequent energy minimization units lj dimension 2 atom_style atomic lattice sq2 0.8442 Lattice spacing in x,y,z = 1.53919 1.53919 1.53919 region box block 0 20 0 20 -0.1 0.1 create_box 1 box Created orthogonal box = (0 0 -0.153919) to (30.7838 30.7838 0.153919) 2 by 2 by 1 MPI processor grid create_atoms 1 box Created 800 atoms Time spent = 0.000340223 secs mass 1 1.0 velocity all create 5.0 87287 loop geom pair_style lj/cut 2.5 pair_coeff 1 1 1.0 1.0 2.5 pair_modify shift yes neighbor 0.3 bin neigh_modify delay 0 every 1 check yes fix 1 all nve fix 2 all enforce2d #dump 1 all atom 100 dump.min #dump 2 all image 50 image.*.jpg type type # zoom 1.6 adiam 1.5 #dump_modify 2 pad 4 #dump 3 all movie 50 movie.mpg type type # zoom 1.6 adiam 1.5 #dump_modify 3 pad 4 thermo 100 run 1000 Neighbor list info ... update every 1 steps, delay 0 steps, check yes max neighbors/atom: 2000, page size: 100000 master list distance cutoff = 2.8 ghost atom cutoff = 2.8 binsize = 1.4, bins = 22 22 1 1 neighbor lists, perpetual/occasional/extra = 1 0 0 (1) pair lj/cut, perpetual attributes: half, newton on pair build: half/bin/atomonly/newton stencil: half/bin/2d/newton bin: standard Per MPI rank memory allocation (min/avg/max) = 3.049 | 3.049 | 3.049 Mbytes Step Temp E_pair E_mol TotEng Press 0 5 -2.461717 0 2.532033 5.0190509 100 3.2788864 -0.74311698 0 2.5316708 15.912832 200 3.3041082 -0.77000277 0 2.5299752 15.602653 300 3.3840228 -0.84859211 0 2.5312006 15.188203 400 3.3916063 -0.85694601 0 2.5304208 15.383853 500 3.3136053 -0.77935264 0 2.5301106 15.833296 600 3.3888915 -0.85213737 0 2.532518 15.162759 700 3.2123636 -0.67641846 0 2.5319297 16.31059 800 3.3016408 -0.76570603 0 2.5318077 15.639259 900 3.4621697 -0.92610292 0 2.5317391 14.773473 1000 3.3058424 -0.77076863 0 2.5309414 15.708171 Loop time of 0.0730537 on 4 procs for 1000 steps with 800 atoms Performance: 5913456.756 tau/day, 13688.557 timesteps/s 95.7% CPU use with 4 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 0.031481 | 0.031893 | 0.032234 | 0.2 | 43.66 Neigh | 0.014234 | 0.014466 | 0.014672 | 0.1 | 19.80 Comm | 0.017078 | 0.01775 | 0.018055 | 0.3 | 24.30 Output | 0.00017548 | 0.00027454 | 0.00056386 | 0.0 | 0.38 Modify | 0.0038447 | 0.0038754 | 0.0038893 | 0.0 | 5.30 Other | | 0.004795 | | | 6.56 Nlocal: 200 ave 202 max 196 min Histogram: 1 0 0 0 0 0 0 0 2 1 Nghost: 170.25 ave 174 max 167 min Histogram: 1 0 1 0 0 1 0 0 0 1 Neighs: 1934.75 ave 1972 max 1873 min Histogram: 1 0 0 0 0 0 1 0 1 1 Total # of neighbors = 7739 Ave neighs/atom = 9.67375 Neighbor list builds = 203 Dangerous builds = 0 neigh_modify delay 0 every 1 check yes #dump_modify 1 every 25 thermo 50 minimize 1.0e-6 0.001 1000 10000 Per MPI rank memory allocation (min/avg/max) = 4.174 | 4.174 | 4.174 Mbytes Step Temp E_pair E_mol TotEng Press 1000 3.3058424 -0.77076863 0 2.5309414 15.708171 1050 3.3058424 -2.8318266 0 0.46988351 1.5980106 1100 3.3058424 -2.8658339 0 0.43587618 1.7013061 1150 3.3058424 -2.8788056 0 0.42290443 1.6855503 1200 3.3058424 -2.8831122 0 0.41859789 1.6869035 1250 3.3058424 -2.8877971 0 0.413913 1.7276622 1300 3.3058424 -2.8887969 0 0.41291311 1.7424655 Loop time of 0.055995 on 4 procs for 300 steps with 800 atoms 96.0% CPU use with 4 MPI tasks x 1 OpenMP threads Minimization stats: Stopping criterion = energy tolerance Energy initial, next-to-last, final = -0.770768629298 -2.88879411525 -2.88879694984 Force two-norm initial, final = 1950.95 0.825241 Force max component initial, final = 374.098 0.224821 Final line search alpha, max atom move = 0.410301 0.0922441 Iterations, force evaluations = 300 595 MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 0.029709 | 0.030492 | 0.031057 | 0.3 | 54.45 Neigh | 0.0040245 | 0.0042111 | 0.0046084 | 0.4 | 7.52 Comm | 0.010827 | 0.011703 | 0.012587 | 0.6 | 20.90 Output | 9.8228e-05 | 0.00024104 | 0.00066733 | 0.0 | 0.43 Modify | 0.0004456 | 0.00045222 | 0.00045633 | 0.0 | 0.81 Other | | 0.008895 | | | 15.89 Nlocal: 200 ave 202 max 196 min Histogram: 1 0 0 0 0 0 1 0 0 2 Nghost: 172.5 ave 175 max 169 min Histogram: 1 0 0 1 0 0 0 0 0 2 Neighs: 1757 ave 1793 max 1721 min Histogram: 1 0 1 0 0 0 0 1 0 1 Total # of neighbors = 7028 Ave neighs/atom = 8.785 Neighbor list builds = 59 Dangerous builds = 0 Total wall time: 0:00:00