Mpich编程

一、简介

通过安装MPICH构建MPI编程环境，从而进行并行程序的开发。MPICH是MPI（Message-Passing Interface）的一个应用实现，支持最新的MPI-2接口标准，是用于并行运算的工具。

二、安装配置

http://www.cnblogs.com/liyanwei/archive/2010/04/26/1721142.html
http://blog.csdn.net/yujiflying/article/details/7206961

三、程序示例

//hello.c
#include "mpi.h"
#include <stdio.h>
#include <math.h>

int main (int argc, char **argv)
{
    int myid, numprocs;
    int namelen;
    char processor_name[MPI_MAX_PROCESSOR_NAME];

    MPI_Init (&argc, &argv);
    MPI_Comm_rank (MPI_COMM_WORLD, &myid);
    MPI_Comm_size (MPI_COMM_WORLD, &numprocs);
    MPI_Get_processor_name (processor_name, &namelen);
    fprintf (stderr, "Hello World! Process %d of %d on %s
", myid, numprocs, processor_name);
    MPI_Finalize ();
    return 0;
}

编译

mpicc -o hello hello.c

运行

Hello World! Process 1 of 4 on jack-laptop
Hello World! Process 3 of 4 on jack-laptop
Hello World! Process 2 of 4 on jack-laptop
Hello World! Process 0 of 4 on jack-laptop