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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include "mpi.h"
#include "mpitest.h"
MPI_Comm comm_all;
static void error_handler(MPI_Comm * communicator, int *error_code, ...)
{
MPI_Comm *new_comm = malloc(sizeof(MPI_Comm));
MPIX_Comm_revoke(comm_all);
MPIX_Comm_shrink(comm_all, new_comm);
MPI_Comm_free(&comm_all);
comm_all = *new_comm;
}
int main(int argc, char *argv[])
{
int rank, size, i;
int sum = 0, val = 1;
int errs = 0;
MPI_Errhandler errhandler;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size < 4) {
fprintf(stderr, "Must run with at least 4 processes.\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Comm_dup(MPI_COMM_WORLD, &comm_all);
MPI_Comm_create_errhandler(&error_handler, &errhandler);
MPI_Comm_set_errhandler(comm_all, errhandler);
for (i = 0; i < 10; ++i) {
MPI_Comm_size(comm_all, &size);
sum = 0;
if (i == 5 && rank == 1) {
exit(1);
} else if (i != 5) {
MPI_Allreduce(&val, &sum, 1, MPI_INT, MPI_SUM, comm_all);
if (sum != size && rank == 0) {
errs++;
fprintf(stderr, "Incorrect answer: %d != %d\n", sum, size);
}
}
}
if (0 == rank && errs) {
fprintf(stdout, " Found %d errors\n", errs);
} else if (0 == rank) {
fprintf(stdout, " No errors\n");
}
MPI_Comm_free(&comm_all);
MPI_Errhandler_free(&errhandler);
MPI_Finalize();
return MTestReturnValue(errs);
}
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