Mpich programming, mpich

Mpich programming, mpich

I. Introduction

Build An MPI Programming Environment by installing MPICH to develop parallel programs. MPICH is an application implementation of MPI (Message-Passing Interface). It supports the latest MPI-2 Interface standard and is a tool for parallel operation.

 

Ii. installation and configuration

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

 

3. program example

//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\n", myid, numprocs, processor_name);    MPI_Finalize ();    return 0;}

Compile

mpicc -o hello hello.c

Run

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