SPARTA (23 Dec 2017)
KOKKOS mode is enabled (../kokkos.cpp:39)
  using 0 GPU(s) per MPI task
  using 4 thread(s) per MPI task
package kokkos
package kokkos reduction parallel/reduce comm classic
# advect particles via VSS collisional flow on a uniform grid
# particles reflect off global box boundaries

variable            x index 10
variable            y index 10
variable            z index 10

variable            lx equal $x*1.0e-5
variable            lx equal 64*1.0e-5
variable            ly equal $y*1.0e-5
variable            ly equal 80*1.0e-5
variable            lz equal $z*1.0e-5
variable            lz equal 80*1.0e-5

variable            n equal 10*$x*$y*$z
variable            n equal 10*64*$y*$z
variable            n equal 10*64*80*$z
variable            n equal 10*64*80*80

seed	    	    12345
dimension   	    3
global              gridcut 1.0e-5

boundary	    rr rr rr

create_box  	    0 ${lx} 0 ${ly} 0 ${lz}
create_box  	    0 0.00064 0 ${ly} 0 ${lz}
create_box  	    0 0.00064 0 0.0008 0 ${lz}
create_box  	    0 0.00064 0 0.0008 0 0.0008
Created orthogonal box = (0 0 0) to (0.00064 0.0008 0.0008)
create_grid 	    $x $y $z
create_grid 	    64 $y $z
create_grid 	    64 80 $z
create_grid 	    64 80 80
WARNING: Could not acquire nearby ghost cells b/c grid partition is not clumped (../grid.cpp:381)
Created 409600 child grid cells
  parent cells = 1
  CPU time = 0.0142729 secs
  create/ghost percent = 59.5941 40.4059

balance_grid        rcb part
Balance grid migrated 403200 cells
  CPU time = 0.091785 secs
  reassign/sort/migrate/ghost percent = 36.7531 0.159232 24.0637 39.0239

species		    ar.species Ar
mixture		    air Ar vstream 0.0 0.0 0.0 temp 273.15

global              nrho 7.07043E22
global              fnum 7.07043E6

collide		    vss air ar.vss

create_particles    air n $n
create_particles    air n 4096000
Created 4096000 particles
  CPU time = 0.0650108 secs

stats		    100
compute             temp temp
stats_style	    step cpu np nattempt ncoll c_temp

# first equilibrate with large timestep to unsort particles
# then benchmark with normal timestep

timestep 	    7.00E-8
run                 30
Memory usage per proc in Mbytes:
  particles (ave,min,max) = 7.44173 7.44173 7.44173
  grid      (ave,min,max) = 2.42208 1.51388 2.45138
  surf      (ave,min,max) = 0 0 0
  total     (ave,min,max) = 9.86381 8.9556 9.8931
Step CPU Np Natt Ncoll c_temp 
       0            0  4096000        0        0    273.04308 
      30    1.4878998  4096000  4111014  2892890    273.04308 
Loop time of 1.48799 on 64 procs for 30 steps with 4096000 particles

Particle moves    = 122880000 (123M)
Cells touched     = 608322806 (608M)
Particle comms    = 19129033 (19.1M)
Boundary collides = 6647024 (6.65M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 118980491 (119M)
Collide occurs    = 86381349 (86.4M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 1.29033e+06
Particle-moves/step: 4.096e+06
Cell-touches/particle/step: 4.95054
Particle comm iterations/step: 3.03333
Particle fraction communicated: 0.155672
Particle fraction colliding with boundary: 0.0540936
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.968266
Collisions/particle/step: 0.702973
Reactions/particle/step: 0

Move  time (%) = 0.761058 (51.1466)
Coll  time (%) = 0.466522 (31.3525)
Sort  time (%) = 0.0763968 (5.13422)
Comm  time (%) = 0.182341 (12.2542)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.00142902 (0.0960369)
Other time (%) = 0.000244495 (0.0164312)

Particles: 64000 ave 64610 max 63462 min
Histogram: 1 4 8 9 14 9 12 4 2 1
Cells:      6400 ave 6400 max 6400 min
Histogram: 64 0 0 0 0 0 0 0 0 0
GhostCell: 3433.69 ave 5120 max 1538 min
Histogram: 2 4 4 12 10 8 8 8 0 8
EmptyCell: 1555.09 ave 2808 max 441 min
Histogram: 2 10 0 20 0 14 6 6 4 2
timestep 	    7.00E-9
run 		    $t
run 		    100
Memory usage per proc in Mbytes:
  particles (ave,min,max) = 7.44173 7.44173 7.44173
  grid      (ave,min,max) = 2.42208 1.51388 2.45138
  surf      (ave,min,max) = 0 0 0
  total     (ave,min,max) = 9.86381 8.9556 9.8931
Step CPU Np Natt Ncoll c_temp 
      30            0  4096000  4111014  2892890    273.04308 
     100   0.87864399  4096000   393340   289694    273.04308 
     130     1.253864  4096000   398203   289119    273.04308 
Loop time of 1.25395 on 64 procs for 100 steps with 4096000 particles

Particle moves    = 409600000 (410M)
Cells touched     = 571037244 (571M)
Particle comms    = 6611381 (6.61M)
Boundary collides = 2216082 (2.22M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 38371362 (38.4M)
Collide occurs    = 28744104 (28.7M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 5.10385e+06
Particle-moves/step: 4.096e+06
Cell-touches/particle/step: 1.39413
Particle comm iterations/step: 1
Particle fraction communicated: 0.0161411
Particle fraction colliding with boundary: 0.00541036
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.0936801
Collisions/particle/step: 0.070176
Reactions/particle/step: 0

Move  time (%) = 0.717761 (57.2398)
Coll  time (%) = 0.22128 (17.6465)
Sort  time (%) = 0.231179 (18.436)
Comm  time (%) = 0.0802709 (6.40143)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.00267831 (0.213589)
Other time (%) = 0.000786029 (0.062684)

Particles: 64000 ave 64584 max 63542 min
Histogram: 4 8 9 12 7 7 6 6 1 4
Cells:      6400 ave 6400 max 6400 min
Histogram: 64 0 0 0 0 0 0 0 0 0
GhostCell: 3433.69 ave 5120 max 1538 min
Histogram: 2 4 4 12 10 8 8 8 0 8
EmptyCell: 1555.09 ave 2808 max 441 min
Histogram: 2 10 0 20 0 14 6 6 4 2