[Boost-users] [ Boost.MPI ] : Spawning processes, Intercommunicators and send custom data-types ?

Subject: [Boost-users] [ Boost.MPI ] : Spawning processes, Intercommunicators and send custom data-types ?
From: Ashika Umanga Umagiliya (aumanga_at_[hidden])
Date: 2009-08-31 02:48:33

Greetings all,

I use OpenMPI 1.3.3 and I tried to spawn child processes (using 
MPI_Comm_spawn) and send user-defined-datatypes across processes.The 
child processes should be ranked from 1-5 while the rank 0 is the 
manager processes (manager.cpp) .
But I get rank 0 for manager process and the child processes also ranked 
starting from 0 (0-4) . So I cannot send data from manager process to 
first child processes (which suppose to be rank 1)

Please give any suggestion to resolve this.
thanks in advance,
umanga

manager.cpp (manager process which spawns child processes) - rank 0
------------------------------------------------------------

int main(int argc,char *argv[]) {
 mpi::environment evn(argc,argv);
 mpi::communicator world;
 MPI_Comm everyone;

//spawn  5 child processes.
MPI_Comm_spawn("./worker", MPI_ARGV_NULL, 5,
                 MPI_INFO_NULL, 0, MPI_COMM_SELF, &everyone,
                 MPI_ERRCODES_IGNORE);

 intercommunicator intcomm(everyone,comm_duplicate);

 if(rank==0){
   GPSPosition *obj=new GPSPosition(100,200,300);
   shared_ptr<Position> pos(new Position);
   pos->setVals();
   obj->addP(pos);
   intcomm.send(0,100,obj);
  }
  
    return 0;
}

worker.cpp (child process)- should be ranked 1-5 ,but get 0-4
-----------------------------------------------------------------------------------

int main(int argc,char *argv[]) {
    mpi::environment evn(argc,argv);
    MPI_Comm parent;
    MPI_Comm_get_parent(&parent);

    intercommunicator incomm(parent,comm_duplicate);
    if(parent==MPI_COMM_NULL){
        cout << "Intercommunicator is Null !"<<endl;
    }else{
      int r=incomm.rank();
      cout <<"Rank !"<<r<< endl; //get 0-4
      if(r==1){
            //try receiving data send from manager process
       }       
    }
  return 0;
}