forked from lijiext/lammps
81 lines
2.3 KiB
Groff
81 lines
2.3 KiB
Groff
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LAMMPS (6 Oct 2016)
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# LAMMPS benchmark of granular flow
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# chute flow of 32000 atoms with frozen base at 26 degrees
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units lj
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atom_style sphere
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boundary p p fs
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newton off
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comm_modify vel yes
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read_data data.chute
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orthogonal box = (0 0 0) to (40 20 37.2886)
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2 by 1 by 2 MPI processor grid
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reading atoms ...
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32000 atoms
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reading velocities ...
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32000 velocities
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pair_style gran/hooke/history 200000.0 NULL 50.0 NULL 0.5 0
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pair_coeff * *
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neighbor 0.1 bin
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neigh_modify every 1 delay 0
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timestep 0.0001
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group bottom type 2
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912 atoms in group bottom
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group active subtract all bottom
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31088 atoms in group active
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neigh_modify exclude group bottom bottom
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fix 1 all gravity 1.0 chute 26.0
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fix 2 bottom freeze
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fix 3 active nve/sphere
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compute 1 all erotate/sphere
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thermo_style custom step atoms ke c_1 vol
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thermo_modify norm no
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thermo 100
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run 100
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Neighbor list info ...
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2 neighbor list requests
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update every 1 steps, delay 0 steps, check yes
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max neighbors/atom: 2000, page size: 100000
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master list distance cutoff = 1.1
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ghost atom cutoff = 1.1
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binsize = 0.55 -> bins = 73 37 68
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Memory usage per processor = 7.04927 Mbytes
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Step Atoms KinEng c_1 Volume
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0 32000 784139.13 1601.1263 29833.783
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100 32000 784292.08 1571.0968 29834.707
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Loop time of 0.171815 on 4 procs for 100 steps with 32000 atoms
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Performance: 5028.653 tau/day, 582.020 timesteps/s
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99.7% CPU use with 4 MPI tasks x no OpenMP threads
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MPI task timing breakdown:
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Section | min time | avg time | max time |%varavg| %total
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---------------------------------------------------------------
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Pair | 0.093691 | 0.096898 | 0.10005 | 0.8 | 56.40
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Neigh | 0.011976 | 0.012059 | 0.012146 | 0.1 | 7.02
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Comm | 0.016384 | 0.017418 | 0.018465 | 0.8 | 10.14
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Output | 7.7963e-05 | 0.00010747 | 0.00013304 | 0.2 | 0.06
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Modify | 0.031744 | 0.031943 | 0.032167 | 0.1 | 18.59
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Other | | 0.01339 | | | 7.79
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Nlocal: 8000 ave 8008 max 7992 min
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Histogram: 2 0 0 0 0 0 0 0 0 2
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Nghost: 2439 ave 2450 max 2428 min
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Histogram: 2 0 0 0 0 0 0 0 0 2
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Neighs: 29500.5 ave 30488 max 28513 min
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Histogram: 2 0 0 0 0 0 0 0 0 2
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Total # of neighbors = 118002
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Ave neighs/atom = 3.68756
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Neighbor list builds = 2
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Dangerous builds = 0
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Total wall time: 0:00:00
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