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/* -*- C -*-
*
* $HEADER$
*
* The most basic of MPI applications
*/
#include <stdio.h>
#include "opal/mca/hwloc/base/base.h"
#include "mpi.h"
#include "orte/util/proc_info.h"
int main(int argc, char* argv[])
{
int rank, size, rc;
hwloc_cpuset_t cpus;
char *bindings = NULL;
pid_t pid;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
pid = getpid();
printf("[%lu] Rank %d: getting topology\n", (unsigned long)pid, rank);
fflush(stdout);
if (OPAL_SUCCESS == opal_hwloc_base_get_topology()) {
cpus = hwloc_bitmap_alloc();
rc = hwloc_get_cpubind(opal_hwloc_topology, cpus, HWLOC_CPUBIND_PROCESS);
hwloc_bitmap_list_asprintf(&bindings, cpus);
}
printf("Hello, World, I am %d of %d [%d local peers]: get_cpubind: %d bitmap %s\n",
rank, size, orte_process_info.num_local_peers, rc,
(NULL == bindings) ? "NULL" : bindings);
MPI_Finalize();
return 0;
}
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