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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
* (C) 2001 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpi.h"
#include "stdio.h"
#include "mpitest.h"
/* transposes a matrix using passive target RMA and derived
datatypes. Uses vector and hvector (Example 3.32 from MPI 1.1
Standard). Run on 2 processes. */
#define NROWS 100
#define NCOLS 100
int main(int argc, char *argv[])
{
int rank, nprocs, A[NROWS][NCOLS], i, j;
MPI_Comm CommDeuce;
MPI_Win win;
MPI_Datatype column, xpose;
int errs = 0;
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (nprocs < 2) {
printf("Run this program with 2 or more processes\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
MPI_Comm_split(MPI_COMM_WORLD, (rank < 2), rank, &CommDeuce);
if (rank < 2) {
if (rank == 0) {
for (i = 0; i < NROWS; i++)
for (j = 0; j < NCOLS; j++)
A[i][j] = i * NCOLS + j;
/* create datatype for one column */
MPI_Type_vector(NROWS, 1, NCOLS, MPI_INT, &column);
/* create datatype for matrix in column-major order */
MPI_Type_hvector(NCOLS, 1, sizeof(int), column, &xpose);
MPI_Type_commit(&xpose);
MPI_Win_create(NULL, 0, 1, MPI_INFO_NULL, CommDeuce, &win);
MPI_Win_lock(MPI_LOCK_SHARED, 1, 0, win);
MPI_Put(A, NROWS * NCOLS, MPI_INT, 1, 0, 1, xpose, win);
MPI_Type_free(&column);
MPI_Type_free(&xpose);
MPI_Win_unlock(1, win);
MPI_Win_free(&win);
}
else { /* rank=1 */
for (i = 0; i < NROWS; i++)
for (j = 0; j < NCOLS; j++)
A[i][j] = -1;
MPI_Win_create(A, NROWS * NCOLS * sizeof(int), sizeof(int), MPI_INFO_NULL, CommDeuce,
&win);
MPI_Win_free(&win);
for (j = 0; j < NCOLS; j++)
for (i = 0; i < NROWS; i++)
if (A[j][i] != i * NCOLS + j) {
printf("Error: A[%d][%d]=%d should be %d\n", j, i, A[j][i], i * NCOLS + j);
errs++;
}
}
}
MPI_Comm_free(&CommDeuce);
MTest_Finalize(errs);
MPI_Finalize();
return 0;
}
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