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 /* USE_STRICT_MPI may be defined in mpitestconf.h */
11 #include "mpitestconf.h"
15 int main(int argc, char **argv)
17 int rank, size, i, j, count;
18 MPI_Group full_group, sub_group;
19 int *included, *ranks;
20 MPI_Comm __attribute__((unused)) comm;
23 MPI_Comm_rank(MPI_COMM_WORLD, &rank);
24 MPI_Comm_size(MPI_COMM_WORLD, &size);
26 ranks = malloc(size * sizeof(int));
27 included = malloc(size * sizeof(int));
28 MPI_Comm_group(MPI_COMM_WORLD, &full_group);
30 for (j = 0; j < LOOPS; j++) {
31 srand(j); /* Deterministic seed */
34 for (i = 0; i < size; i++) {
35 if (rand() % 2) { /* randomly include a rank */
43 MPI_Group_incl(full_group, count, ranks, &sub_group);
45 #if !defined(USE_STRICT_MPI) && defined(MPICH)
47 MPI_Comm_create_group(MPI_COMM_WORLD, sub_group, 0, &comm);
51 #endif /* USE_STRICT_MPI */
53 MPI_Group_free(&sub_group);
56 MPI_Group_free(&full_group);
59 printf(" No Errors\n");