62 строки
1.4 KiB
C
62 строки
1.4 KiB
C
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/*
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* Copyright (c) 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <netdb.h>
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#include <unistd.h>
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#include <mpi.h>
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#define ITERATIONS 1000000
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static void allocate_comms(void);
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static void deallocate_comms(void);
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static MPI_Comm communicator_a, communicator_b, communicator_c;
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int
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main(int argc, char *argv[])
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{
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int rank; /* COMM_WORLD rank of process */
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int np; /* number of processes in job */
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int i;
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int unslept;
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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, &np);
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for (i=0; i < ITERATIONS; i++) {
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/* allocate our communicators */
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allocate_comms();
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/* simulate doing work */
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unslept = sleep(5);
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/* deallocate communicators forgetting one of the communicators */
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deallocate_comms();
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}
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MPI_Finalize();
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return 0;
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}
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void allocate_comms(void) {
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MPI_Comm_dup(MPI_COMM_WORLD, &communicator_a);
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MPI_Comm_dup(MPI_COMM_WORLD, &communicator_b);
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MPI_Comm_dup(MPI_COMM_WORLD, &communicator_c);
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}
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void deallocate_comms(void) {
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MPI_Comm_free(&communicator_a);
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MPI_Comm_free(&communicator_c);
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}
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