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lammps/bench/log.15Feb16.chute.scaled.icc.4
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LAMMPS (15 Feb 2016)
# LAMMPS benchmark of granular flow
# chute flow of 32000 atoms with frozen base at 26 degrees
variable x index 1
variable y index 1
units lj
atom_style sphere
boundary p p fs
newton off
comm_modify vel yes
read_data data.chute
orthogonal box = (0 0 0) to (40 20 37.2886)
2 by 1 by 2 MPI processor grid
reading atoms ...
32000 atoms
reading velocities ...
32000 velocities
replicate $x $y 1
replicate 2 $y 1
replicate 2 2 1
orthogonal box = (0 0 0) to (80 40 37.2922)
2 by 2 by 1 MPI processor grid
128000 atoms
pair_style gran/hooke/history 200000.0 NULL 50.0 NULL 0.5 0
pair_coeff * *
neighbor 0.1 bin
neigh_modify every 1 delay 0
timestep 0.0001
group bottom type 2
3648 atoms in group bottom
group active subtract all bottom
124352 atoms in group active
neigh_modify exclude group bottom bottom
fix 1 all gravity 1.0 chute 26.0
fix 2 bottom freeze
fix 3 active nve/sphere
compute 1 all erotate/sphere
thermo_style custom step atoms ke c_1 vol
thermo_modify norm no
thermo 100
run 100
Neighbor list info ...
2 neighbor list requests
update every 1 steps, delay 0 steps, check yes
max neighbors/atom: 2000, page size: 100000
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
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
Performance: 952.683 tau/day, 110.264 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 | 0.51454 | 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
Nlocal: 32000 ave 32000 max 32000 min
Histogram: 4 0 0 0 0 0 0 0 0 0
Nghost: 5463 ave 5463 max 5463 min
Histogram: 4 0 0 0 0 0 0 0 0 0
Neighs: 115133 ave 115133 max 115133 min
Histogram: 4 0 0 0 0 0 0 0 0 0
Total # of neighbors = 460532
Ave neighs/atom = 3.59791
Neighbor list builds = 2
Dangerous builds = 0
Total wall time: 0:00:01
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