- 下载MPI,网址为:http://www.mpich.org/,选择windows版本的
- 按默认路径下载
右击项目->属性,进行配置:
VC++目录->包含目录,添加:“C:\Program Files (x86)\Microsoft SDKs\MPI\Include;”
VC++目录->库目录,添加:“C:\Program Files (x86)\Microsoft SDKs\MPI\Lib\x86;”
右上角->配置管理器->活动解决方案平台,选择:x86;
C/C++ -> 预处理器->预处理器定义,添加:“MPICH_SKIP_MPICXX;”
C/C++ -> 代码生成 -> 运行库,选择:多线程调试(/MTd);
链接器 -> 输入 -> 附加依赖项,添加:“msmpi.lib;”输入程序
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <mpi.h>
#include <string>
#include <cstring>
#include <cstdlib>
using namespace std;
const int MAX_STRLEN = 100;
int main(int argc, char **argv)
{
char greeting[MAX_STRLEN];
int comm_sz;
int my_rank;
MPI_Init(NULL, NULL);
MPI_Comm_size(MPI_COMM_WORLD, &comm_sz);
MPI_Comm_rank(MPI_COMM_WORLD, &my_rank);
if (my_rank != 0) {
sprintf(greeting, "Greetings from %d of %d", my_rank, comm_sz);
MPI_Send(greeting, strlen(greeting) + 1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);
}
else {
printf("Greeting from %d of %d!\n", my_rank, comm_sz);
for (int q = 1; q < comm_sz; q++) {
MPI_Recv(greeting, MAX_STRLEN, MPI_CHAR, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, MPI_STATUSES_IGNORE);
printf("%s\n", greeting);
}
}
MPI_Finalize();
return 0;
}
- 编译后在命令行打开
命令:mpiexec -n 10 MPI_test.exe #-n 10 表示开十个线程 - 运行结果
Greeting from 0 of 10!
Greetings from 4 of 10
Greetings from 1 of 10
Greetings from 3 of 10
Greetings from 2 of 10
Greetings from 6 of 10
Greetings from 9 of 10
Greetings from 8 of 10
Greetings from 7 of 10
Greetings from 5 of 10
由于不同线程指令执行的随机性,输出内容顺序可能不同