C++ MPI多进程并发

本文作者原创，首发在本博客；CSDN 上的同名文章已标注为转载并回链到本页：https://blog.csdn.net/qq_30220519/article/details/139566971

下载

用法

mpiexec -n 8 $PROCESS_COUNT x64\Debug\$TARGET.exe   多进程并发启动

mpiexec -f hosts.txt -n 3 $PROCESS_COUNT x64\Debug\$TARGET.exe     联机并发进程，其它联机电脑需在相同路径下有所有程序

//hosts.txt

192.168.86.16
192.168.86.123
192.168.86.108

Demo

#include <stdio.h>
#include <string.h>       // For strlen() function
#include <mpi.h>          // For MPI programming functions
#define MAX_STRING (100)

int _tmain(int argc, _TCHAR* argv[])
{
	char greeting[MAX_STRING];
	int comm_sz;            // Number of processes
	int my_rank;            // My process 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 process %d of %d!", my_rank, comm_sz);
		MPI_Send(greeting, strlen(greeting) + 1, MPI_CHAR, 0, 0, MPI_COMM_WORLD);
	}
	else
	{
		printf("Greetings from process %d of %d!\n", my_rank, comm_sz);
		for (int q = 1; q < comm_sz; q++)
		{
			MPI_Recv(greeting, MAX_STRING, MPI_CHAR, q, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
			printf("%s\n", greeting);
		}
	}

	MPI_Finalize();
	return 0;
}

参考

win10环境下vs2013+mpich2并行环境搭建_vs2013 mpich-CSDN博客

MPI并行环境配置（Windows 10＋VSIDE Community 2019）_amd mpi并行-CSDN博客

windows下安装mpich2_如何安装spmd。exe-CSDN博客

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