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/*
* Copyright (C) 2010. See COPYRIGHT in top-level directory.
*/
#include <stdio.h>
#include <stdlib.h>
#include <mpi.h>
#define XDIM 1024
#define YDIM 1024
#define ITERATIONS 10
int main(int argc, char **argv) {
int itr, i, j, rank, nranks, peer, bufsize, errors = 0;
double *buffer, *src_buf;
MPI_Win buf_win;
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &nranks);
bufsize = XDIM * YDIM * sizeof(double);
MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &buffer);
MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &src_buf);
if (rank == 0)
printf("MPI RMA Strided Accumulate Test:\n");
for (i = 0; i < XDIM*YDIM; i++) {
*(buffer + i) = 1.0 + rank;
*(src_buf + i) = 1.0 + rank;
}
MPI_Win_create(buffer, bufsize, 1, MPI_INFO_NULL, MPI_COMM_WORLD, &buf_win);
peer = (rank+1) % nranks;
for (itr = 0; itr < ITERATIONS; itr++) {
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, peer, 0, buf_win);
for (j = 0; j < YDIM; j++) {
MPI_Accumulate(src_buf + j*XDIM, XDIM, MPI_DOUBLE, peer,
j*XDIM*sizeof(double), XDIM, MPI_DOUBLE, MPI_SUM, buf_win);
}
MPI_Win_unlock(peer, buf_win);
}
MPI_Barrier(MPI_COMM_WORLD);
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, buf_win);
for (i = 0; i < XDIM; i++) {
for (j = 0; j < YDIM; j++) {
const double actual = *(buffer + i + j*XDIM);
const double expected = (1.0 + rank) + (1.0 + ((rank+nranks-1)%nranks)) * (ITERATIONS);
if (actual - expected > 1e-10) {
printf("%d: Data validation failed at [%d, %d] expected=%f actual=%f\n",
rank, j, i, expected, actual);
errors++;
fflush(stdout);
}
}
}
MPI_Win_unlock(rank, buf_win);
MPI_Win_free(&buf_win);
MPI_Free_mem(buffer);
MPI_Free_mem(src_buf);
MPI_Finalize();
if (errors == 0) {
printf("%d: Success\n", rank);
return 0;
} else {
printf("%d: Fail\n", rank);
return 1;
}
}
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