/* -*- Mode: C; c-basic-offset:4 ; -*- *//* *  (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 100int main(int argc, char *argv[]) {     int rank, nprocs, A[NROWS][NCOLS], i, j;    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 processes\n");        MPI_Abort(MPI_COMM_WORLD,1);    }    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, MPI_COMM_WORLD, &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,                        MPI_COMM_WORLD, &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++;                }    }    /* if (rank==0) printf("Done\n"); */    MTest_Finalize(errs);    MPI_Finalize();     return 0; }