Revision f5d395aca20928fe5b6962b4222d0945e982de72 authored by Simon Byrne on 23 April 2020, 22:57:48 UTC, committed by GitHub on 23 April 2020, 22:57:48 UTC
1 parent 5ae9eb8
04-sendrecv.jl
using MPI
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)
N = 4
send_mesg = Array{Float64}(undef, N)
recv_mesg = Array{Float64}(undef, N)
fill!(send_mesg, Float64(rank))
rreq = MPI.Irecv!(recv_mesg, src, src+32, comm)
print("$rank: Sending $rank -> $dst = $send_mesg\n")
sreq = MPI.Isend(send_mesg, dst, rank+32, comm)
stats = MPI.Waitall!([rreq, sreq])
print("$rank: Received $src -> $rank = $recv_mesg\n")
MPI.Barrier(comm)
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