SPARTA (23 Dec 2017)
KOKKOS mode is enabled (../kokkos.cpp:39)
  using 0 GPU(s) per MPI task
  using 2 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 = 0.00769413 secs
  create/ghost percent = 65.2715 34.7285

balance_grid        rcb part
Balance grid migrated 396800 cells
  CPU time = 0.0616679 secs
  reassign/sort/migrate/ghost percent = 32.3633 0.203273 39.0914 28.3421

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 = 0.0423548 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) = 15.6276 15.6276 15.6276
  grid      (ave,min,max) = 3.7131 2.95138 3.88888
  surf      (ave,min,max) = 0 0 0
  total     (ave,min,max) = 19.3407 18.579 19.5165
Step CPU Np Natt Ncoll c_temp 
       0            0  4096000        0        0    273.01785 
      30    1.0230505  4096000  4107816  2891250    273.01785 
Loop time of 1.08329 on 32 procs for 30 steps with 4096000 particles

Particle moves    = 122880000 (123M)
Cells touched     = 608273907 (608M)
Particle comms    = 14392669 (14.4M)
Boundary collides = 6646665 (6.65M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 118963098 (119M)
Collide occurs    = 86377521 (86.4M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 3.54475e+06
Particle-moves/step: 4.096e+06
Cell-touches/particle/step: 4.95015
Particle comm iterations/step: 3
Particle fraction communicated: 0.117128
Particle fraction colliding with boundary: 0.0540907
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.968124
Collisions/particle/step: 0.702942
Reactions/particle/step: 0

Move  time (%) = 0.459668 (42.4326)
Coll  time (%) = 0.367289 (33.9049)
Sort  time (%) = 0.108003 (9.96989)
Comm  time (%) = 0.146245 (13.5001)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.00190427 (0.175786)
Other time (%) = 0.000181066 (0.0167145)

Particles: 128000 ave 128847 max 127285 min
Histogram: 3 1 4 7 3 4 5 2 1 2
Cells:      12800 ave 12800 max 12800 min
Histogram: 32 0 0 0 0 0 0 0 0 0
GhostCell: 4797.12 ave 6784 max 2194 min
Histogram: 2 4 0 2 8 0 8 0 0 8
EmptyCell: 1986.06 ave 3612 max 441 min
Histogram: 2 0 8 0 10 2 0 8 0 2
timestep 	    7.00E-9
run 		    $t
run 		    100
Memory usage per proc in Mbytes:
  particles (ave,min,max) = 15.6276 15.6276 15.6276
  grid      (ave,min,max) = 3.7131 2.95138 3.88888
  surf      (ave,min,max) = 0 0 0
  total     (ave,min,max) = 19.3407 18.579 19.5165
Step CPU Np Natt Ncoll c_temp 
      30            0  4096000  4107816  2891250    273.01785 
     100   0.66597749  4096000   393018   289324    273.01785 
     130   0.95882675  4096000   398533   289672    273.01785 
Loop time of 1.01524 on 32 procs for 100 steps with 4096000 particles

Particle moves    = 409600000 (410M)
Cells touched     = 571030963 (571M)
Particle comms    = 4925910 (4.93M)
Boundary collides = 2215751 (2.22M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 38375534 (38.4M)
Collide occurs    = 28742106 (28.7M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 1.26079e+07
Particle-moves/step: 4.096e+06
Cell-touches/particle/step: 1.39412
Particle comm iterations/step: 1
Particle fraction communicated: 0.0120261
Particle fraction colliding with boundary: 0.00540955
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.0936903
Collisions/particle/step: 0.0701712
Reactions/particle/step: 0

Move  time (%) = 0.419492 (41.3195)
Coll  time (%) = 0.183176 (18.0426)
Sort  time (%) = 0.353449 (34.8143)
Comm  time (%) = 0.0558231 (5.49851)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.00294469 (0.290048)
Other time (%) = 0.000355978 (0.0350635)

Particles: 128000 ave 128617 max 127405 min
Histogram: 2 1 2 7 5 5 5 2 2 1
Cells:      12800 ave 12800 max 12800 min
Histogram: 32 0 0 0 0 0 0 0 0 0
GhostCell: 4797.12 ave 6784 max 2194 min
Histogram: 2 4 0 2 8 0 8 0 0 8
EmptyCell: 1986.06 ave 3612 max 441 min
Histogram: 2 0 8 0 10 2 0 8 0 2