LAMMPS (6 Oct 2016)
# LAMMPS benchmark of granular flow
# chute flow of 32000 atoms with frozen base at 26 degrees

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

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
912 atoms in group bottom
group		active subtract all bottom
31088 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 = 73 37 68
Memory usage per processor = 7.04927 Mbytes
Step Atoms KinEng c_1 Volume 
       0    32000    784139.13    1601.1263    29833.783 
     100    32000    784292.08    1571.0968    29834.707 
Loop time of 0.171815 on 4 procs for 100 steps with 32000 atoms

Performance: 5028.653 tau/day, 582.020 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    | 0.093691   | 0.096898   | 0.10005    |   0.8 | 56.40
Neigh   | 0.011976   | 0.012059   | 0.012146   |   0.1 |  7.02
Comm    | 0.016384   | 0.017418   | 0.018465   |   0.8 | 10.14
Output  | 7.7963e-05 | 0.00010747 | 0.00013304 |   0.2 |  0.06
Modify  | 0.031744   | 0.031943   | 0.032167   |   0.1 | 18.59
Other   |            | 0.01339    |            |       |  7.79

Nlocal:    8000 ave 8008 max 7992 min
Histogram: 2 0 0 0 0 0 0 0 0 2
Nghost:    2439 ave 2450 max 2428 min
Histogram: 2 0 0 0 0 0 0 0 0 2
Neighs:    29500.5 ave 30488 max 28513 min
Histogram: 2 0 0 0 0 0 0 0 0 2

Total # of neighbors = 118002
Ave neighs/atom = 3.68756
Neighbor list builds = 2
Dangerous builds = 0
Total wall time: 0:00:00
