LAMMPS (16 Mar 2018) OMP_NUM_THREADS environment is not set. Defaulting to 1 thread. (../comm.cpp:90) using 1 OpenMP thread(s) per MPI task # 3d Lennard-Jones melt units lj atom_style atomic lattice fcc 0.8442 Lattice spacing in x,y,z = 1.6796 1.6796 1.6796 region box block 0 20 0 20 0 20 create_box 1 box Created orthogonal box = (0 0 0) to (33.5919 33.5919 33.5919) 1 by 2 by 2 MPI processor grid create_atoms 1 box Created 32000 atoms Time spent = 0.000587225 secs mass 1 1.0 velocity all create 1.44 87287 loop geom pair_style lj/cut 2.5 pair_coeff 1 1 1.0 1.0 2.5 neighbor 0.3 bin neigh_modify delay 5 every 1 fix 1 all nve run 100 Neighbor list info ... update every 1 steps, delay 5 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 = 24 24 24 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/3d/newton bin: standard Per MPI rank memory allocation (min/avg/max) = 6.88 | 6.88 | 6.88 Mbytes Step Temp E_pair E_mol TotEng Press 0 1.44 -6.7733681 0 -4.6134356 -5.0197073 100 0.75745998 -5.7584998 0 -4.6223453 0.20729996 Loop time of 0.469936 on 4 procs for 100 steps with 32000 atoms Performance: 91927.316 tau/day, 212.795 timesteps/s 99.1% CPU use with 4 MPI tasks x 1 OpenMP threads MPI task timing breakdown: Section | min time | avg time | max time |%varavg| %total --------------------------------------------------------------- Pair | 0.32713 | 0.32917 | 0.33317 | 0.4 | 70.05 Neigh | 0.10836 | 0.10931 | 0.11007 | 0.2 | 23.26 Comm | 0.015526 | 0.020355 | 0.022399 | 2.0 | 4.33 Output | 4.2439e-05 | 5.8353e-05 | 0.00010061 | 0.0 | 0.01 Modify | 0.0071156 | 0.0072448 | 0.007309 | 0.1 | 1.54 Other | | 0.003793 | | | 0.81 Nlocal: 8000 ave 8041 max 7958 min Histogram: 2 0 0 0 0 0 0 0 0 2 Nghost: 9011 ave 9065 max 8961 min Histogram: 1 1 0 0 0 0 0 1 0 1 Neighs: 300794 ave 304843 max 297317 min Histogram: 1 0 0 1 1 0 0 0 0 1 Total # of neighbors = 1203176 Ave neighs/atom = 37.5992 Neighbor list builds = 11 Dangerous builds = 0 Total wall time: 0:00:00