/* -*- 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"/* This does a local transpose-cum-accumulate operation. Uses    vector and hvector datatypes (Example 3.32 from MPI 1.1   Standard). Run on 1 process. */#define NROWS 100#define NCOLS 100int main(int argc, char *argv[]) {     int nprocs, A[NROWS][NCOLS], B[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);     if (nprocs != 1)    {        printf("Run this program with 1 process\n");        MPI_Abort(MPI_COMM_WORLD,1);    }    for (i=0; i<NROWS; i++)        for (j=0; j<NCOLS; j++)            A[i][j] = B[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(B, NROWS*NCOLS*sizeof(int), sizeof(int), MPI_INFO_NULL,                    MPI_COMM_WORLD, &win);         MPI_Win_fence(0, win);         MPI_Accumulate(A, NROWS*NCOLS, MPI_INT, 0, 0, 1, xpose, MPI_SUM, win);        MPI_Type_free(&column);    MPI_Type_free(&xpose);        MPI_Win_fence(0, win);         for (j=0; j<NCOLS; j++)    {        for (i=0; i<NROWS; i++)	{            if (B[j][i] != i*NCOLS + j + j*NCOLS + i)	    {		if (errs < 20)		{		    printf("Error: B[%d][%d]=%d should be %d\n", j, i,			B[j][i], i*NCOLS + j + j*NCOLS + i);		}                errs++;            }	}    }    if (errs >= 20)    {	printf("Total number of errors: %d\n", errs);    }    MPI_Win_free(&win);     MTest_Finalize(errs);    MPI_Finalize();     return 0; }