centos7上安装mpich3.2

1. 执行下载安装命令

yum install -y mpich-3.2-devel.x86_64

2. 修改环境变量

vim ~/.bashrc

在行末输入如下语句

export PATH=$PATH:/usr/lib64/mpich-3.2/bin/

3. 使环境变量生效

source  ~/.bashrc

4. 编写并行程序

     
    #include <mpi.h>
    #include <stdio.h>
    #include <math.h>
    int main(int argc,char** argv)
    {
    
    
        int myid,numproces;
        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,&numproces);
        MPI_Get_processor_name(processor_name,&namelen);
        fprintf(stdout,"hello world! Process %d of %d on %s\n",
                myid,numproces,processor_name);
        MPI_Finalize();
        return 0;
     
    }

5. 执行mpi程序

mpicc -o hello hello.c
mpirun -np 8 ./hello