OpenMPI 在 debian 單機上的安裝設定 (OpenMPI On PC)

2012-07-27 - R.J' Wiki : OpenMPI 在 debian 單機上的安裝設定

• 環境
  • debian GNU/Linux 6.0 stable
  • openmpi-bin 版本 1.4.2-4
  • CPU ( lscpu )
    

    Architecture:          i686
    CPU op-mode(s):        32-bit, 64-bit
    CPU(s):                2
    Thread(s) per core:    1
    Core(s) per socket:    2
    CPU socket(s):         1
    Vendor ID:             GenuineIntel
    CPU family:            6
    Model:                 23
    Stepping:              10
    

• 安裝(install)

  sudo aptitude install libopenmpi-dev openmpi-bin openmpi-doc
  

• 程式碼(code)
  MPI_Hello.c

  #include <stdio.h>
  #include <stdio>
  
  int main(int argc, char* argv[]) {
     int myrank, nprocs;
  
     MPI_Init(&argc, &argv);
     MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
     MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
  
     printf("Hello from processor %d of %d\n", myrank, nprocs);
  
     MPI_Finalize();
     return 0;
  }
  

• 編譯(compiler)

  mpicc MPI_Hello.c -o MPI_Hello
  

• 執行(run)

  mpiexec -n 4 MPI_Hello
  

  或

  mpirun -n 4 MPI_Hello
  

• 輸出結果(output)

  Hello from processor 2 of 4
  Hello from processor 0 of 4
  Hello from processor 1 of 4
  Hello from processor 3 of 4
  

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ref - http://sealmemory.blogspot.tw/2012/05/ubuntu-1204-openmpi-cluster.html