glpid.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) 2001 by Argonne National Laboratory.
 *      See COPYRIGHT in top-level directory.
 */
#include <stdio.h>
#include "mpi.h"
#include "mpiimpl.h"

int main( int argc, char *argv[] )
{
    MPID_Group group, *group_ptr = &group;
    int i;

    MPI_Init( &argc, &argv );

    /* Setup a sample group */
    group.handle = 1;
    group.ref_count = 1;
    group.size = 4;
    group.rank = 0;
    group.idx_of_first_lpid = -1;
    group.lrank_to_lpid = (MPID_Group_pmap_t *)
	MPIU_Malloc( group.size * sizeof(MPID_Group_pmap_t) );
    for (i=0; i<group.size; i++) {
	group.lrank_to_lpid[i].lrank     = i;
	group.lrank_to_lpid[i].lpid      = group.size - i - 1;
	group.lrank_to_lpid[i].next_lpid = -1;
	group.lrank_to_lpid[i].flag      = 0;
    }

    /* Set up the group lpid list */
    MPIR_Group_setup_lpid_list( group_ptr );

    /* Print the group structure */
    printf ("Index of first lpid = %d\n", group.idx_of_first_lpid );
    for (i=0; i<group.size; i++) {
	printf( "lrank_to_lpid[%d].next_lpid = %d, .lpid = %d\n",
		i, group.lrank_to_lpid[i].next_lpid, 
		group.lrank_to_lpid[i].lpid );
    }

    MPI_Finalize( );
    return 0;
}