https://github.com/JuliaParallel/MPI.jl
Tip revision: 69ce0bf5c15e4a29cb4a4c3df3e8d02f3e9ba0ad authored by Simon Byrne on 23 January 2023, 18:49:26 UTC
Tag v0.20.8 (#712)
Tag v0.20.8 (#712)
Tip revision: 69ce0bf
test_gatherv.jl
include("common.jl")
MPI.Init()
comm = MPI.COMM_WORLD
size = MPI.Comm_size(comm)
rank = MPI.Comm_rank(comm)
root = 0
isroot = rank == root
counts = Cint[mod(i,2) + 1 for i in 0:(size-1)]
check = collect(Iterators.flatten([fill(r, counts[r+1]) for r = 0:size-1]))
for T in MPITestTypes
A = ArrayType(fill(T(rank), mod(rank,2) + 1))
synchronize()
# Test passing the output buffer
B = ArrayType{T}(undef, sum(counts))
MPI.Gatherv!(A, isroot ? VBuffer(B, counts) : nothing, comm; root=root)
if isroot
@test B == ArrayType{T}(check)
end
# Test assertion when output size is too small
B = ArrayType{T}(undef, sum(counts)-1)
if isroot
@test_throws AssertionError MPI.Gatherv!(A, VBuffer(B, counts), comm; root=root)
end
# Test explicit MPI_IN_PLACE
if isroot
B = ArrayType(fill(T(rank), sum(counts)))
synchronize()
MPI.Gatherv!(MPI.IN_PLACE, VBuffer(B, counts), comm; root=root)
else
B = ArrayType(fill(T(rank), counts[rank+1]))
synchronize()
MPI.Gatherv!(B, nothing, comm; root=root)
end
if isroot
@test B == ArrayType{T}(check)
end
end
MPI.Finalize()
@test MPI.Finalized()