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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/* vim: set ft=c.mpich : */
/*
* (C) 2018 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include <stdio.h>
#include <assert.h>
#include "mpi.h"
int main(int argc, char *argv[])
{
int size, rank;
int local_rank, local_size;
MPI_Comm split_comm;
int buffer = 0;
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_split(MPI_COMM_WORLD, rank % 2, rank, &split_comm);
MPI_Barrier(split_comm);
MPI_Comm_size(split_comm, &local_size);
MPI_Comm_rank(split_comm, &local_rank);
/* two processes trying to abort on the same subcomm
* should comlete normally, no hanging */
if (rank == 1) {
MPI_Abort(split_comm, 8);
}
if (rank == 5) {
MPI_Abort(split_comm, 4);
}
if (rank == 0) {
buffer = 4;
MPI_Send(&buffer, 1, MPI_INT, 1, 0, split_comm);
}
if (rank == 2) {
MPI_Recv(&buffer, 1, MPI_INT, 0, 0, split_comm, MPI_STATUS_IGNORE);
assert(buffer == 4);
printf("No Errors\n");
fflush(stdout);
}
MPI_Comm_free(&split_comm);
MPI_Finalize();
return 0;
}
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