Weak scaling performance, Free benchmark, P100, 16M particles/node
Performance in millions of particle-timesteps / second / node

Nodes Kokkos/Cuda-1 (mpi) Kokkos/Cuda-2 (mpi) Kokkos/Cuda-4 (mpi)
1 230.2 (1) 458.5 (2) 877.6 (4)
2 225.8 (1) 448.4 (2) 851.4 (4)
4 220.3 (1) 436.6 (2) 818.3 (4)
8 215.1 (1) 422.4 (2) 791.1 (4)

Run commands and logfile links for column Kokkos/Cuda-1

1 mpirun -np 1 --npernode 1 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 1 -pk kokkos reduction atomic comm threaded -v x 128 -v y 80 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=1.mpi=1.gpu=1
2 mpirun -np 2 --npernode 1 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 1 -pk kokkos reduction atomic comm threaded -v x 128 -v y 160 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=2.mpi=1.gpu=1
4 mpirun -np 4 --npernode 1 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 1 -pk kokkos reduction atomic comm threaded -v x 256 -v y 160 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=4.mpi=1.gpu=1
8 mpirun -np 8 --npernode 1 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 1 -pk kokkos reduction atomic comm threaded -v x 256 -v y 160 -v z 320 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=8.mpi=1.gpu=1

Run commands and logfile links for column Kokkos/Cuda-2

1 mpirun -np 2 --npersocket 1 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 2 -pk kokkos reduction atomic comm threaded -v x 128 -v y 80 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=1.mpi=2.gpu=2
2 mpirun -np 4 --npersocket 1 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 2 -pk kokkos reduction atomic comm threaded -v x 128 -v y 160 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=2.mpi=2.gpu=2
4 mpirun -np 8 --npersocket 1 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 2 -pk kokkos reduction atomic comm threaded -v x 256 -v y 160 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=4.mpi=2.gpu=2
8 mpirun -np 16 --npersocket 1 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 2 -pk kokkos reduction atomic comm threaded -v x 256 -v y 160 -v z 320 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=8.mpi=2.gpu=2

Run commands and logfile links for column Kokkos/Cuda-4

1 mpirun -np 4 --npersocket 2 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 4 -pk kokkos reduction atomic comm threaded -v x 128 -v y 80 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=1.mpi=4.gpu=4
2 mpirun -np 8 --npersocket 2 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 4 -pk kokkos reduction atomic comm threaded -v x 128 -v y 160 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=2.mpi=4.gpu=4
4 mpirun -np 16 --npersocket 2 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 4 -pk kokkos reduction atomic comm threaded -v x 256 -v y 160 -v z 160 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=4.mpi=4.gpu=4
8 mpirun -np 32 --npersocket 2 --bind-to core spa_ride100_kokkos_cuda -sf kk -k on g 4 -pk kokkos reduction atomic comm threaded -v x 256 -v y 160 -v z 320 -v t 100 -in in.free.steps -log log.sparta.date=23Dec17.model=free.machine=ride100.pkg=kokkos_cuda.kind=weak.size=16M.node=8.mpi=4.gpu=4