split2.java

MPI for java for Distributed Programming

package mpi.comm;

import mpi.*;

public class split2 {
  static public void main(String[] args) throws MPIException {
  }

  public split2() {
  }

  public split2(String[] args) throws Exception {
	  
    MPI.Init(args);
    int size = MPI.COMM_WORLD.Size();    
    int rank  = MPI.COMM_WORLD.Rank();    
    
    if(size != 8) { 
      if(rank == 0) 	    
        System.out.println("comm->split2: MUST RUN WITH 8 processes");
      MPI.COMM_WORLD.Barrier();
      MPI.Finalize(); 
      return;
    } 
    

    int color = 2*rank/size;
    int key   = size - rank - 1;
    Intracomm newcomm = MPI.COMM_WORLD.Split(color,key);   
    int nrank = newcomm.Rank();

    MPI.COMM_WORLD.Barrier();
    if(rank == 0) 
	    System.out.println("split2 TEST COMPLETE");
    MPI.Finalize();
  }
}