Ubuntu下Openmpi安装

╰+哭是因爲堅強的太久メ 2023-02-20 10:56 15阅读 0赞

## 1、安装包下载 ##

[openmpi下载路径][openmpi]

## 2、OpenMPI手动编译配置安装 ##

1.  解压

~/installPackage$ tar -zxvf openmpi-4.0.4.tar.gz

1.  编译安装

$ cd /home/qulei/installPackage/openmpi-4.0.4/
    $ ./configure --prefix=$HOME/opt/openMpi
    $ make all
    $ sudo make install

1.  配置环境变量

$ cd 
    $ vim .bashrc 
    export PATH=$PATH:/home/qulei/opt/openMpi/bin
    export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/qulei/opt/openMpi/lib

4.查看版本

$ mpiexec --version
    mpiexec (OpenRTE) 2.1.1
    
    Report bugs to http://www.open-mpi.org/community/help/
    
    $ mpirun --version
    mpirun (Open MPI) 2.1.1
    
    Report bugs to http://www.open-mpi.org/community/help/

## 3、测试 ##

建立一个hello.c文件进行环境测试。具体测试可以参考：[MPI Hello World][]

#include <mpi.h>
    #include <stdio.h>
    
    int main(int argc, char** argv) { 
        // Initialize the MPI environment
        MPI_Init(NULL, NULL);
    
        // Get the number of processes
        int world_size;
        MPI_Comm_size(MPI_COMM_WORLD, &world_size);
    
        // Get the rank of the process
        int world_rank;
        MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
    
        // Get the name of the processor
        char processor_name[MPI_MAX_PROCESSOR_NAME];
        int name_len;
        MPI_Get_processor_name(processor_name, &name_len);
    
        // Print off a hello world message
        printf("Hello world from processor %s, rank %d out of %d processors\n",
               processor_name, world_rank, world_size);
    
        // Finalize the MPI environment.
        MPI_Finalize();
    }

用 mpicc hello.c -o test编译文件：

code$ mpicc hello.c  -o hello

执行：

code$ mpirun -np 2 ./hello
    Hello world from processor qulei-System-Product-Name, rank 0 out of 2 processors
    Hello world from processor qulei-System-Product-Name, rank 1 out of 2 processors

以上 -np 2 表示用两个线程执行程序

[openmpi]: https://download.open-mpi.org/release/open-mpi/v4.0/openmpi-4.0.4.tar.gz
[MPI Hello World]: https://mpitutorial.com/tutorials/mpi-hello-world/