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DONOTMERGE: Purge communicator before free on mpich4+ #787

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DONOTMERGE: Purge communicator before free on mpich4+ #787

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17 changes: 17 additions & 0 deletions src/runtime-libraries/mpi/mpi_caf.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1104,6 +1104,23 @@ finalize_internal(int status_code)
ierr = MPI_Finalize(); chk_err(ierr);
}
#else
#ifdef MPICH
{
int probe_flag;
MPI_Status status;
do {
ierr = MPI_Iprobe(MPI_ANY_SOURCE, MPI_ANY_TAG, CAF_COMM_WORLD, &probe_flag,
&status); /* error is not of interest. */
if (probe_flag) {
int cnt;
MPI_Get_count(&status, MPI_BYTE, &cnt);
void * buf = alloca(cnt);
ierr = MPI_Recv(buf, cnt, MPI_BYTE, status.MPI_SOURCE, status.MPI_TAG,
CAF_COMM_WORLD, &status); chk_err(ierr);
}
} while (probe_flag);
}
#endif
ierr = MPI_Comm_free(&CAF_COMM_WORLD); chk_err(ierr);

CAF_Win_unlock_all(*stat_tok);
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