root/orte/test/mpi/slave.c

DEFINITIONS

1. main

   1 /* -*- C -*-
   2  *
   3  * $HEADER$
   4  *
   5  * The most basic of MPI applications
   6  */
   7 
   8 #include <stdio.h>
   9 #include <unistd.h>
  10 #include "mpi.h"
  11 
  12 int main(int argc, char* argv[])
  13 {
  14     int rank, size;
  15     MPI_Comm parent;
  16     int msg;
  17 
  18     printf("Slave [pid %ld] starting up!\n", (long)getpid());
  19 
  20     MPI_Init(&argc, &argv);
  21 
  22     MPI_Comm_rank(MPI_COMM_WORLD, &rank);
  23     MPI_Comm_size(MPI_COMM_WORLD, &size);
  24 
  25     MPI_Comm_get_parent(&parent);
  26 
  27     MPI_Recv(&msg, 1, MPI_INT, 0, 1, parent, MPI_STATUS_IGNORE);
  28     printf("Slave %d received msg: %d\n", rank, msg);
  29     MPI_Comm_disconnect(&parent);
  30 
  31     MPI_Finalize();
  32     return 0;
  33 }