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 32*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*$z
variable            n equal 10*32*$y*$z
variable            n equal 10*32*20*$z
variable            n equal 10*32*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 0.00032 0 ${ly} 0 ${lz}
create_box  	    0 0.00032 0 0.0002 0 ${lz}
create_box  	    0 0.00032 0 0.0002 0 0.0002
Created orthogonal box = (0 0 0) to (0.00032 0.0002 0.0002)
create_grid 	    $x $y $z
create_grid 	    32 $y $z
create_grid 	    32 20 $z
create_grid 	    32 20 20
WARNING: Could not acquire nearby ghost cells b/c grid partition is not clumped (../grid.cpp:381)
Created 12800 child grid cells
  parent cells = 1
  CPU time = 0.00202614 secs
  create/ghost percent = 81.6302 18.3698

balance_grid        rcb part
Balance grid migrated 11200 cells
  CPU time = 0.00600615 secs
  reassign/sort/migrate/ghost percent = 26.1459 0.150968 29.3457 44.3575

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 128000
Created 128000 particles
  CPU time = 0.00546176 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   128000        0        0    275.12363 
      30   0.13630343   128000   128717    90571    275.12363 
Loop time of 0.115411 on 8 procs for 30 steps with 128000 particles

Particle moves    = 3840000 (3.84M)
Cells touched     = 18568211 (18.6M)
Particle comms    = 645394 (0.645M)
Boundary collides = 672795 (0.673M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 3724006 (3.72M)
Collide occurs    = 2703480 (2.7M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 4.15905e+06
Particle-moves/step: 128000
Cell-touches/particle/step: 4.83547
Particle comm iterations/step: 3
Particle fraction communicated: 0.168071
Particle fraction colliding with boundary: 0.175207
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.969793
Collisions/particle/step: 0.704031
Reactions/particle/step: 0

Move  time (%) = 0.0491002 (42.5438)
Coll  time (%) = 0.0397089 (34.4065)
Sort  time (%) = 0.0108284 (9.38245)
Comm  time (%) = 0.0156207 (13.5348)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.000101455 (0.0879075)
Other time (%) = 5.13191e-05 (0.0444664)

Particles: 16000 ave 16118 max 15845 min
Histogram: 1 0 1 1 1 0 0 0 3 1
Cells:      1600 ave 1600 max 1600 min
Histogram: 8 0 0 0 0 0 0 0 0 0
GhostCell: 992 ave 992 max 992 min
Histogram: 8 0 0 0 0 0 0 0 0 0
EmptyCell: 535 ave 535 max 535 min
Histogram: 8 0 0 0 0 0 0 0 0 0
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   128000   128717    90571    275.12363 
     100    0.0769722   128000    12242     8928    275.12363 
     130   0.10990293   128000    12418     8957    275.12363 
Loop time of 0.0930567 on 8 procs for 100 steps with 128000 particles

Particle moves    = 12800000 (12.8M)
Cells touched     = 17706729 (17.7M)
Particle comms    = 222975 (0.223M)
Boundary collides = 224566 (0.225M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 1201303 (1.2M)
Collide occurs    = 900334 (0.9M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 1.71938e+07
Particle-moves/step: 128000
Cell-touches/particle/step: 1.38334
Particle comm iterations/step: 1
Particle fraction communicated: 0.0174199
Particle fraction colliding with boundary: 0.0175442
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.0938518
Collisions/particle/step: 0.0703386
Reactions/particle/step: 0

Move  time (%) = 0.0324737 (34.8967)
Coll  time (%) = 0.0185023 (19.8828)
Sort  time (%) = 0.0342786 (36.8363)
Comm  time (%) = 0.00751145 (8.07191)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.000174369 (0.18738)
Other time (%) = 0.0001163 (0.124978)

Particles: 16000 ave 16087 max 15901 min
Histogram: 1 1 0 1 1 0 1 1 1 1
Cells:      1600 ave 1600 max 1600 min
Histogram: 8 0 0 0 0 0 0 0 0 0
GhostCell: 992 ave 992 max 992 min
Histogram: 8 0 0 0 0 0 0 0 0 0
EmptyCell: 535 ave 535 max 535 min
Histogram: 8 0 0 0 0 0 0 0 0 0