并行计算之HelloWorld

最新推荐文章于 2024-08-07 14:39:08 发布

原创最新推荐文章于 2024-08-07 14:39:08 发布 · 1.5k 阅读

1 ·

CC 4.0 BY-SA版权

并行计算专栏收录该内容

5 篇文章

订阅专栏

本文展示了如何使用MPI库在C语言中实现并行计算，并通过Hello World示例来演示其基本用法。通过初始化、获取进程数量、当前进程ID以及处理器名称等操作，实现跨进程间的通信。

#include <stdio.h>
#include "mpi.h"		
int main(int argc, char* argv[])
{
  	int myid, numprocs,namelen;
  	char processor_name[MPI_MAX_PROCESSOR_NAME];
	MPI_Init(&argc, &argv); 	// Initialize the MPI environment
	// Get the size of process in the current process group
	MPI_Comm_size( MPI_COMM_WORLD, &numprocs );
	// Get the rank of the current process
	MPI_Comm_rank( MPI_COMM_WORLD, &myid );
	// Get the name of the processor which is running this process
	MPI_Get_processor_name(processor_name, &namelen);
	// Say hello world
	printf("Hello World! Process %d of %d on %s\n", myid, numprocs,               
           processor_name);
	MPI_Finalize(); 	// Exit the MPI environment	
	return 0;
}

MPI运行效果图