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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/** Contended RMA put/get test -- James Dinan <dinan@mcs.anl.gov>
*
* Each process issues COUNT put and get operations to non-overlapping
* locations on every other process.
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "mpi.h"
#include "mpitest.h"
#define MAXELEMS 6400
#define COUNT 1000
static int me, nproc;
static const int verbose = 0;
void test_put(void);
void test_put(void)
{
MPI_Win dst_win;
double *dst_buf;
double src_buf[MAXELEMS];
int i, j;
MPI_Alloc_mem(sizeof(double) * nproc * MAXELEMS, MPI_INFO_NULL, &dst_buf);
MPI_Win_create(dst_buf, sizeof(double) * nproc * MAXELEMS, 1, MPI_INFO_NULL, MPI_COMM_WORLD,
&dst_win);
for (i = 0; i < MAXELEMS; i++)
src_buf[i] = me + 1.0;
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, me, 0, dst_win);
for (i = 0; i < nproc * MAXELEMS; i++)
dst_buf[i] = 0.0;
MPI_Win_unlock(me, dst_win);
MPI_Barrier(MPI_COMM_WORLD);
for (i = 0; i < nproc; i++) {
int target = i;
for (j = 0; j < COUNT; j++) {
if (verbose)
printf("%2d -> %2d [%2d]\n", me, target, j);
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, target, 0, dst_win);
MPI_Put(&src_buf[j], sizeof(double), MPI_BYTE, target,
(me * MAXELEMS + j) * sizeof(double), sizeof(double), MPI_BYTE, dst_win);
MPI_Win_unlock(target, dst_win);
}
for (j = 0; j < COUNT; j++) {
if (verbose)
printf("%2d <- %2d [%2d]\n", me, target, j);
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, target, 0, dst_win);
MPI_Get(&src_buf[j], sizeof(double), MPI_BYTE, target,
(me * MAXELEMS + j) * sizeof(double), sizeof(double), MPI_BYTE, dst_win);
MPI_Win_unlock(target, dst_win);
}
}
MPI_Barrier(MPI_COMM_WORLD);
MPI_Win_free(&dst_win);
MPI_Free_mem(dst_buf);
}
int main(int argc, char *argv[])
{
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &nproc);
MPI_Comm_rank(MPI_COMM_WORLD, &me);
assert(COUNT <= MAXELEMS);
if (me == 0 && verbose) {
printf("Test starting on %d processes\n", nproc);
fflush(stdout);
}
test_put();
MPI_Barrier(MPI_COMM_WORLD);
MTest_Finalize(0);
if (me == 0 && verbose) {
printf("Test completed.\n");
fflush(stdout);
}
return 0;
}
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