forked from lijiext/lammps
91 lines
2.5 KiB
Groff
91 lines
2.5 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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variable x index 1
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variable y index 1
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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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replicate $x $y 1
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replicate 2 $y 1
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replicate 2 2 1
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orthogonal box = (0 0 0) to (80 40 37.2922)
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2 by 2 by 1 MPI processor grid
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128000 atoms
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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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3648 atoms in group bottom
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group active subtract all bottom
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124352 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 = 146 73 68
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Memory usage per processor = 16.1265 Mbytes
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Step Atoms KinEng c_1 Volume
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0 128000 3136556.5 6404.5051 119335.13
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100 128000 3137168.3 6284.3873 119338.83
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Loop time of 0.832365 on 4 procs for 100 steps with 128000 atoms
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Performance: 1038.006 tau/day, 120.140 timesteps/s
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99.8% 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 | 0.5178 | 0.52208 | 0.52793 | 0.5 | 62.72
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Neigh | 0.047003 | 0.047113 | 0.047224 | 0.0 | 5.66
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Comm | 0.05233 | 0.052988 | 0.053722 | 0.2 | 6.37
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Output | 0.00024986 | 0.00032717 | 0.00036693 | 0.3 | 0.04
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Modify | 0.15517 | 0.15627 | 0.15808 | 0.3 | 18.77
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Other | | 0.0536 | | | 6.44
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Nlocal: 32000 ave 32000 max 32000 min
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Histogram: 4 0 0 0 0 0 0 0 0 0
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Nghost: 5463 ave 5463 max 5463 min
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Histogram: 4 0 0 0 0 0 0 0 0 0
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Neighs: 115133 ave 115133 max 115133 min
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Histogram: 4 0 0 0 0 0 0 0 0 0
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Total # of neighbors = 460532
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Ave neighs/atom = 3.59791
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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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