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 40*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*40

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 0.0004
Created orthogonal box = (0 0 0) to (0.00032 0.0002 0.0004)
create_grid 	    $x $y $z
create_grid 	    32 $y $z
create_grid 	    32 20 $z
create_grid 	    32 20 40
WARNING: Could not acquire nearby ghost cells b/c grid partition is not clumped (../grid.cpp:381)
Created 25600 child grid cells
  parent cells = 1
  CPU time = 0.00362937 secs
  create/ghost percent = 69.3116 30.6884

balance_grid        rcb part
Balance grid migrated 24898 cells
  CPU time = 0.00903952 secs
  reassign/sort/migrate/ghost percent = 37.1445 0.190765 29.8239 32.8409

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 256000
Created 256000 particles
  CPU time = 0.00554241 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   256000        0        0    272.56468 
      30    0.0964941   256000   256453   180333    272.56468 
Loop time of 0.096555 on 36 procs for 30 steps with 256000 particles

Particle moves    = 7680000 (7.68M)
Cells touched     = 37470328 (37.5M)
Particle comms    = 2285044 (2.29M)
Boundary collides = 1085147 (1.09M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 7433051 (7.43M)
Collide occurs    = 5397886 (5.4M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 2.20945e+06
Particle-moves/step: 256000
Cell-touches/particle/step: 4.87895
Particle comm iterations/step: 3.06667
Particle fraction communicated: 0.297532
Particle fraction colliding with boundary: 0.141295
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.967845
Collisions/particle/step: 0.70285
Reactions/particle/step: 0

Move  time (%) = 0.0384939 (39.8673)
Coll  time (%) = 0.0231855 (24.0127)
Sort  time (%) = 0.00864335 (8.95174)
Comm  time (%) = 0.0260385 (26.9676)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.000144971 (0.150143)
Other time (%) = 4.87623e-05 (0.050502)

Particles: 7111.11 ave 7271 max 6880 min
Histogram: 2 0 1 0 10 5 6 7 4 1
Cells:      711.111 ave 712 max 711 min
Histogram: 32 0 0 0 0 0 0 0 0 4
GhostCell: 898.889 ave 1599 max 423 min
Histogram: 3 7 2 8 2 7 2 1 2 2
EmptyCell: 342.75 ave 680 max 81 min
Histogram: 4 2 6 1 9 5 4 2 2 1
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   256000   256453   180333    272.56468 
     100  0.053134484   256000    24503    18046    272.56468 
     130  0.076158424   256000    24894    18064    272.56468 
Loop time of 0.076211 on 36 procs for 100 steps with 256000 particles

Particle moves    = 25600000 (25.6M)
Cells touched     = 35458078 (35.5M)
Particle comms    = 940473 (0.94M)
Boundary collides = 361610 (0.362M)
Boundary exits    = 0 (0K)
SurfColl checks   = 0 (0K)
SurfColl occurs   = 0 (0K)
Surf reactions    = 0 (0K)
Collide attempts  = 2396091 (2.4M)
Collide occurs    = 1794449 (1.79M)
Reactions         = 0 (0K)
Particles stuck   = 0

Particle-moves/CPUsec/proc: 9.33082e+06
Particle-moves/step: 256000
Cell-touches/particle/step: 1.38508
Particle comm iterations/step: 1
Particle fraction communicated: 0.0367372
Particle fraction colliding with boundary: 0.0141254
Particle fraction exiting boundary: 0
Surface-checks/particle/step: 0
Surface-collisions/particle/step: 0
Surf-reactions/particle/step: 0
Collision-attempts/particle/step: 0.0935973
Collisions/particle/step: 0.0700957
Reactions/particle/step: 0

Move  time (%) = 0.0269865 (35.4102)
Coll  time (%) = 0.0122114 (16.0232)
Sort  time (%) = 0.0250671 (32.8917)
Comm  time (%) = 0.0115634 (15.1729)
Modfy time (%) = 0 (0)
Outpt time (%) = 0.000284707 (0.373576)
Other time (%) = 9.79279e-05 (0.128496)

Particles: 7111.11 ave 7266 max 6950 min
Histogram: 4 2 4 1 5 7 1 5 5 2
Cells:      711.111 ave 712 max 711 min
Histogram: 32 0 0 0 0 0 0 0 0 4
GhostCell: 898.889 ave 1599 max 423 min
Histogram: 3 7 2 8 2 7 2 1 2 2
EmptyCell: 342.75 ave 680 max 81 min
Histogram: 4 2 6 1 9 5 4 2 2 1