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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "mpitest.h"
/*
* This test attempts collective communication after a process in
* the communicator has failed.
*/
int main(int argc, char **argv)
{
int rank, size, i, rc, errclass, toterrs, errs = 0;
char rbuf[100000];
char *sendbuf;
int deadprocs[1] = { 1 };
MPI_Group world, newgroup;
MPI_Comm newcomm;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
if (size < 3) {
fprintf(stderr, "Must run with at least 3 processes\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Comm_group(MPI_COMM_WORLD, &world);
MPI_Group_excl(world, 1, deadprocs, &newgroup);
MPI_Comm_create_group(MPI_COMM_WORLD, newgroup, 0, &newcomm);
if (rank == 1) {
exit(EXIT_FAILURE);
}
/* try a small send first */
sendbuf = (char *) malloc(10 * size * sizeof(char));
if (rank == 0) {
for (i = 0; i < size; i++) {
strcpy(sendbuf + i * 10, "No Errors");
}
}
rc = MPI_Scatter(sendbuf, 10, MPI_CHAR, rbuf, 10, MPI_CHAR, 0, MPI_COMM_WORLD);
#if defined (MPICH) && (MPICH_NUMVERSION >= 30100102)
MPI_Error_class(rc, &errclass);
if ((rc) && (errclass != MPIX_ERR_PROC_FAILED)) {
fprintf(stderr, "Wrong error code (%d) returned. Expected MPIX_ERR_PROC_FAILED\n",
errclass);
errs++;
}
#endif
/* reset the buffers and try a larger scatter */
free(sendbuf);
memset(rbuf, 0, sizeof(rbuf));
sendbuf = (char *) malloc(100000 * size * sizeof(char));
if (rank == 0) {
for (i = 0; i < size; i++) {
strcpy(sendbuf + i * 100000, "No Errors");
}
}
rc = MPI_Scatter(sendbuf, 100000, MPI_CHAR, rbuf, 100000, MPI_CHAR, 0, MPI_COMM_WORLD);
#if defined (MPICH) && (MPICH_NUMVERSION >= 30100102)
MPI_Error_class(rc, &errclass);
if ((rc) && (errclass != MPIX_ERR_PROC_FAILED)) {
fprintf(stderr, "Wrong error code (%d) returned. Expected MPIX_ERR_PROC_FAILED\n",
errclass);
errs++;
}
#endif
rc = MPI_Reduce(&errs, &toterrs, 1, MPI_INT, MPI_SUM, 0, newcomm);
if (rc)
fprintf(stderr, "Failed to get errors from other processes\n");
if (rank == 0) {
if (toterrs) {
printf(" Found %d errors\n", toterrs);
} else {
printf(" No Errors\n");
}
fflush(stdout);
}
free(sendbuf);
MPI_Comm_free(&newcomm);
MPI_Group_free(&newgroup);
MPI_Group_free(&world);
MPI_Finalize();
return MTestReturnValue(errs);
}
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