534d70025f
1. no binding support - indicated by a negative return code from get_cpubind 2. binding supported, but not bound - the bitset returned by get_cpubind is the same as the available cpuset 3. binding supported and bound - bitset from get_cpubind is a subset of available cpuset 4. only one cpu is available - in this case, get_cpubind matches the available cpuset, but we are effectively bound This commit was SVN r25957.
33 строки
691 B
C
33 строки
691 B
C
/* -*- C -*-
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*
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* $HEADER$
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*
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* The most basic of MPI applications
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*/
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#include <stdio.h>
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#include "opal/mca/hwloc/hwloc.h"
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#include "mpi.h"
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int main(int argc, char* argv[])
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{
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int rank, size, rc;
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hwloc_cpuset_t cpus;
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char *bindings;
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MPI_Init(&argc, &argv);
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MPI_Comm_rank(MPI_COMM_WORLD, &rank);
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MPI_Comm_size(MPI_COMM_WORLD, &size);
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cpus = hwloc_bitmap_alloc();
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rc = hwloc_get_cpubind(opal_hwloc_topology, cpus, HWLOC_CPUBIND_PROCESS);
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hwloc_bitmap_list_asprintf(&bindings, cpus);
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printf("Hello, World, I am %d of %d: rc %d bitmap %s\n", rank, size, rc,
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(NULL == bindings) ? "NULL" : bindings);
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MPI_Finalize();
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return 0;
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}
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