CUDA-aware MPI test
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| using MPI | |
| using CUDA | |
| MPI.Init() | |
| comm = MPI.COMM_WORLD | |
| rank = MPI.Comm_rank(comm) | |
| size = MPI.Comm_size(comm) | |
| dst = mod(rank+1, size) | |
| src = mod(rank-1, size) | |
| println("rank=$rank, size=$size, dst=$dst, src=$src") | |
| N = 4 | |
| send_mesg = CuArray{Float64}(undef, N) | |
| recv_mesg = CuArray{Float64}(undef, N) | |
| fill!(send_mesg, Float64(rank)) | |
| CUDA.synchronize() | |
| MPI.Sendrecv!(send_mesg, dst, 0, recv_mesg, src, 0, comm) | |
| println("recv_mesg on proc $rank: $recv_mesg") | |
| rank==0 && println("done.") |
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