99 строки
2.4 KiB
C
99 строки
2.4 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University.
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* All rights reserved.
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* Copyright (c) 2004-2005 The Trustees of the University of Tennessee.
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* All rights reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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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 "ompi_config.h"
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#include "mpi.h"
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <math.h>
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#include <assert.h>
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#include <sys/time.h>
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#include "test_util.h"
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#define MYBUFSIZE (1<<22)
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#define MAX_REQ_NUM 1024
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MPI_Request request[MAX_REQ_NUM];
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MPI_Status tmp_stat[MAX_REQ_NUM];
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int skip = 0;
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int
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main (int argc,
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char *argv[])
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{
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int myid, numprocs, i, j;
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int size=0, loop, page_size;
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struct timeval t_start, t_end;
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char *s_buf, *r_buf;
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s_buf = (char *) malloc (sizeof(char)*MYBUFSIZE);
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r_buf = (char *) malloc (sizeof(char)*MYBUFSIZE);
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/* Get some environmental variables set for Open MPI, OOB */
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env_init_for_elan();
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if (argc < 3) {
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fprintf (stderr, "Usage: %s loop size \n", argv[0]);
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MPI_Finalize ();
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return 0;
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}
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MPI_Init (&argc, &argv);
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MPI_Comm_size (MPI_COMM_WORLD, &numprocs);
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MPI_Comm_rank (MPI_COMM_WORLD, &myid);
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size = atoi (argv[2]);
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loop= atoi (argv[1]);
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page_size = getpagesize ();
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for (i = 0; i < size ; i++) {
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s_buf[i] = 'a';
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r_buf[i] = 'b';
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}
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if (myid == 0) {
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/* Start time */
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if ( i == skip )
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gettimeofday (&t_start, 0);
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for (j = 0; j < loop; j++) {
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MPI_Isend (s_buf, size, MPI_CHAR, 1, 100, MPI_COMM_WORLD,
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request + j);
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}
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MPI_Waitall (loop, request, tmp_stat);
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} else {
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for (j = 0; j < loop; j++) {
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MPI_Irecv (r_buf, size, MPI_CHAR, 0, 100, MPI_COMM_WORLD,
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request + j);
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/*MPI_Wait(request, tmp_stat);*/
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}
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MPI_Waitall (loop, request, tmp_stat);
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}
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if (myid == 0) {
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double latency;
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gettimeofday (&t_end, 0);
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latency = ((1.0e6 * t_end.tv_sec + t_end.tv_usec)
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- (1.0e6 * t_start.tv_sec + t_start.tv_usec))
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/ (loop);
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fprintf (stdout, "%8d %8.2f\n", size, size / latency);
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fflush (stdout);
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}
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MPI_Finalize ();
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return 0;
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}
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