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BUG: mpi: use group-local communicator allocation. Fixes #2158

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This commit is contained in:
mattijs
2021-07-15 11:23:39 +01:00
committed by Mark Olesen
parent 8f1bad1cb4
commit 13740de427
1 changed files with 3 additions and 2 deletions
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5
src/Pstream/mpi/UPstream.C
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@ -1091,11 +1091,12 @@ void Foam::UPstream::allocatePstreamCommunicator
&PstreamGlobals::MPIGroups_[index]
);
// Create new communicator
MPI_Comm_create
// Create new communicator for this group
MPI_Comm_create_group
(
PstreamGlobals::MPICommunicators_[parentIndex],
PstreamGlobals::MPIGroups_[index],
Pstream::msgType(),
&PstreamGlobals::MPICommunicators_[index]
);