Getting Sart with OpenMPI On Federa 14 X86_64

Getting Sart with OpenMPI On Federa 14 X86_64

 

来源：http://dvbmonkey.wordpress.com/2009/02/27/getting-started-with-open-mpi-on-fedora/

 

背景介绍：工作需要，涉及到MPI编程，查了些资料，现将安装步骤记录如下，以备不时之需。由于只需要单机模式，不需要点集形式，所以配置起来也比较简单。

安装 ：$ sudo yum install openmpi openmpi-devel openmpi-libs

安装之后，查看安装位置：

$ whereis oenmpi

openmpi:/usr/lib64/openmpi


配置 ：将MPI的bin和lib加入到PATH 和LD_LIBRARY_PATH中去。

打开$HOME/.bash_profile
在最后加上

PATH=$PATH:/usr/lib64/openmpi/bin

LD_LIBRARY_PATH=/usr/lib64/openmpi/lib

保存

注销后登录查看配置结果

$echo $PATH

$echo $LD_LIBRARY_PATH

结果中显示有/usr/lib64/openmpi/lbin和 /usr/lib64/openmpi/lib则为配置成功

测试：

hello.c:

#include <stdio.h>


#include <mpi.h>


#include <unistd.h>





int main(int argc, char *argv[]) {


   int numprocs, rank, namelen;


   char processor_name[MPI_MAX_PROCESSOR_NAME];


   MPI_Init(&argc, &argv);


   MPI_Comm_size(MPI_COMM_WORLD, &numprocs);


   MPI_Comm_rank(MPI_COMM_WORLD, &rank);


   MPI_Get_processor_name(processor_name, &namelen);


   printf("Hello World! from process %d out of %d on %s/n", rank, numprocs, processor_name);


   MPI_Finalize();


 


  return 0;


}





编译：mpicc -o hello hello.c


运行：mpirun -np5 hello


运行结果显示：


Hello World! from process 0 out of 5 on Shisir


Hello World! from process 4 out of 5 on Shisir


Hello World! from process 2 out of 5 on Shisir


Hello World! from process 3 out of 5 on Shisir


Hello World! from process 1 out of 5 on Shisir





恭喜  安装配置成功！