1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
3 * (C) 2003 by Argonne National Laboratory.
4 * See COPYRIGHT in top-level directory.
10 #include "mpitestconf.h"
14 int main(int argc, char **argv)
16 int rank, size, i, j, count;
17 MPI_Group full_group, sub_group;
18 int *included, *ranks;
22 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
23 MPI_Comm_size(MPI_COMM_WORLD, &size);
25 ranks = malloc(size * sizeof(int));
26 included = malloc(size * sizeof(int));
27 MPI_Comm_group(MPI_COMM_WORLD, &full_group);
29 for (j = 0; j < LOOPS; j++) {
30 srand(j); /* Deterministic seed */
33 for (i = 0; i < size; i++) {
34 if (rand() % 2) { /* randomly include a rank */
42 MPI_Group_incl(full_group, count, ranks, &sub_group);
45 MPI_Comm_create_group(MPI_COMM_WORLD, sub_group, 0, &comm);
50 MPI_Group_free(&sub_group);
53 MPI_Group_free(&full_group);
56 printf(" No Errors\n");