topotest.c

mpi并行计算的c++代码 可用vc或gcc编译通过 可以用来搭建并行计算试验环境

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *
 *  (C) 2003 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include "mpi.h"
#include <stdio.h>
#include "mpitest.h"

int main( int argc, char *argv[] )
{
    int errs = 0;
    int topo_type, size, dims[1], periods[1];
    MPI_Comm comm;

    MTest_Init( &argc, &argv );

    /* Check that topo test returns the correct type, including 
       MPI_UNDEFINED */

    MPI_Topo_test( MPI_COMM_WORLD, &topo_type );
    if (topo_type != MPI_UNDEFINED) {
	errs++;
	printf( "Topo type of comm world is not UNDEFINED\n" );
    }

    MPI_Comm_size( MPI_COMM_WORLD, &size );
    dims[0] = size;
    periods[0] = 0;
    MPI_Cart_create( MPI_COMM_WORLD, 1, dims, periods, 0, &comm );
    MPI_Topo_test( comm, &topo_type );
    if (topo_type != MPI_CART) {
	errs++;
	printf( "Topo type of cart comm is not CART\n" );
    }

    MPI_Comm_free( &comm );
    /* FIXME: still need graph example */

    MTest_Finalize( errs );
    MPI_Finalize();
    return 0;
  
}