SPARTA (23 Dec 2017)
KOKKOS mode is enabled (../kokkos.cpp:39)
  using 0 GPU(s) per MPI task
  using 1 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 16*1.0e-5
variable            ly equal $y*1.0e-5
variable            ly equal 20*1.0e-5
variable            lz equal $z*1.0e-5
variable            lz equal 20*1.0e-5

variable            n equal 10*$x*$y*$z
variable            n equal 10*16*$y*$z
variable            n equal 10*16*20*$z
variable            n equal 10*16*20*20

seed	    	    12345
dimension   	    3
global              gridcut 1.0e-5

boundary	    rr rr rr

create_box  	    0 ${lx} 0 ${ly} 0 ${lz}
create_box  	    0 0.00016 0 ${ly} 0 ${lz}
create_box  	    0 0.00016 0 0.0002 0 ${lz}
create_box  	    0 0.00016 0 0.0002 0 0.0002
Created orthogonal box = (0 0 0) to (0.00016 0.0002 0.0002)
create_grid 	    $x $y $z
create_grid 	    16 $y $z
create_grid 	    16 20 $z
create_grid 	    16 20 20
WARNING: Could not acquire nearby ghost cells b/c grid partition is not clumped (../grid.cpp:381)
Created 6400 child grid cells
  parent cells = 1
  CPU time = 0.010144 secs
  create/ghost percent = 61.948 38.052

balance_grid        rcb part
Balance grid migrated 6160 cells
  CPU time = 0.0446329 secs
  reassign/sort/migrate/ghost percent = 60.0746 0.0779898 26.3194 13.528

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 64000
Created 64000 particles
  CPU time = 0.0173321 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) = 1.6875 1.6875 1.6875
  grid      (ave,min,max) = 1.51388 1.51388 1.51388
  surf      (ave,min,max) = 0 0 0
  total     (ave,min,max) = 3.20138 3.20138 3.20138
Step CPU Np Natt Ncoll c_temp 
       0            0    64000        0        0    271.12227 
      30  0.074306965    64000    64100    45157    271.12227 
Loop time of 0.0743788 on 64 procs for 30 steps with 64000 particles

Particle moves    = 1920000 (1.92M)
Cells touched     = 9278640 (9.28M)
Particle comms    = 1055210 (1.06M)
Boundary collides = 415030 (0.415M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 1857664 (1.86M)
Collide occurs    = 1348884 (1.35M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 403341
Particle-moves/step: 64000
Cell-touches/particle/step: 4.83263
Particle comm iterations/step: 3.3
Particle fraction communicated: 0.549589
Particle fraction colliding with boundary: 0.216161
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.967533
Collisions/particle/step: 0.702544
Reactions/particle/step: 0

Move  time (%) = 0.0376348 (50.5988)
Coll  time (%) = 0.0151418 (20.3577)
Sort  time (%) = 0.00176309 (2.37042)
Comm  time (%) = 0.0195723 (26.3143)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.000176936 (0.237885)
Other time (%) = 8.99918e-05 (0.120991)

Particles: 1000 ave 1068 max 916 min
Histogram: 2 3 4 4 11 13 12 5 6 4
Cells:      100 ave 100 max 100 min
Histogram: 64 0 0 0 0 0 0 0 0 0
GhostCell: 279.688 ave 548 max 80 min
Histogram: 8 8 8 8 4 16 4 0 0 8
EmptyCell: 147.312 ave 354 max 0 min
Histogram: 4 12 8 8 4 16 4 0 0 8
timestep 	    7.00E-9
run 		    $t
run 		    100
Memory usage per proc in Mbytes:
  particles (ave,min,max) = 1.6875 1.6875 1.6875
  grid      (ave,min,max) = 1.51388 1.51388 1.51388
  surf      (ave,min,max) = 0 0 0
  total     (ave,min,max) = 3.20138 3.20138 3.20138
Step CPU Np Natt Ncoll c_temp 
      30            0    64000    64100    45157    271.12227 
     100  0.022315025    64000     6134     4524    271.12227 
     130  0.031960964    64000     6158     4423    271.12227 
Loop time of 0.0320301 on 64 procs for 100 steps with 64000 particles

Particle moves    = 6400000 (6.4M)
Cells touched     = 8810408 (8.81M)
Particle comms    = 405453 (0.405M)
Boundary collides = 137764 (0.138M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 599151 (0.599M)
Collide occurs    = 448370 (0.448M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 3.12206e+06
Particle-moves/step: 64000
Cell-touches/particle/step: 1.37663
Particle comm iterations/step: 1
Particle fraction communicated: 0.063352
Particle fraction colliding with boundary: 0.0215256
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.0936173
Collisions/particle/step: 0.0700578
Reactions/particle/step: 0

Move  time (%) = 0.0147068 (45.9156)
Coll  time (%) = 0.0062716 (19.5803)
Sort  time (%) = 0.00154551 (4.82519)
Comm  time (%) = 0.00903694 (28.2139)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.000260096 (0.812036)
Other time (%) = 0.000209145 (0.652964)

Particles: 1000 ave 1044 max 913 min
Histogram: 1 0 3 5 7 9 6 10 13 10
Cells:      100 ave 100 max 100 min
Histogram: 64 0 0 0 0 0 0 0 0 0
GhostCell: 279.688 ave 548 max 80 min
Histogram: 8 8 8 8 4 16 4 0 0 8
EmptyCell: 147.312 ave 354 max 0 min
Histogram: 4 12 8 8 4 16 4 0 0 8