[mpich-discuss] Running one MPI program from another

[Rod Cook]

Jayesh,

I can get my example code to work using MPI_Comm_spawn but it doesn't work for my actual application. The problem with using MPI_Comm_spawn is that I don't know how to tell that the spawned program has finished -- this is why I used CreateProcess because it is possible to wait for the program to terminate. The spawned program could be a non MPI executable or a standalone MPI executable which can't communicate with the program calling MPI_Comm_spawn. 

Cheers,

Rod
  ----- Original Message ----- 
  From: Jayesh Krishna 
  To: 'Rod Cook' 
  Cc: mpich-discuss at mcs.anl.gov 
  Sent: Wednesday, April 22, 2009 3:40 PM
  Subject: RE: [mpich-discuss] Running one MPI program from another


  Hi,
   Did you try MPI_Comm_spawn() ?

  Regards,
  Jayesh



------------------------------------------------------------------------------
  From: mpich-discuss-bounces at mcs.anl.gov [mailto:mpich-discuss-bounces at mcs.anl.gov] On Behalf Of Rod Cook
  Sent: Wednesday, April 22, 2009 7:50 AM
  To: mpich-discuss at mcs.anl.gov
  Subject: [mpich-discuss] Running one MPI program from another


  Hi,

  I am trying to run an MPI program (prog) from another MPI program (test) using CreateProcess under Windows XP.  I am using MPICH2 v1.08. 

  Source for test
  #include "stdafx.h"
  #include <afx.h>
  #include "mpi.h"
  int run_program( char * program )
  {
     STARTUPINFO si;
     PROCESS_INFORMATION pi;
     ZeroMemory( &si, sizeof(si) );
     si.cb = sizeof(si);
     ZeroMemory( &pi, sizeof(pi) );
     if( !CreateProcess( NULL, program, NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi )  ) 
     {
        return -1;
     }
     WaitForSingleObject( pi.hProcess, INFINITE );
     CloseHandle( pi.hProcess );
     CloseHandle( pi.hThread );
     return 0;
  }
  int main(int argc, char* argv[])
  {
     MPI_Init(NULL,NULL);
     run_program("prog");
     MPI_Finalize();
   return 0;
  }

  Source for prog
  #include "stdafx.h"
  #include "mpi.h"
  int main(int argc, char* argv[])
  {
     MPI_Init( NULL, NULL );
     MPI_Finalize();
     return 0;
  }

  I get the following error when I run test:

  >mpiexec -n 1 test
  MPIDU_Sock_post_connect failed.
  [0] PMI_ConnectToHost failed: unable to post a connect to Yellowtail yellowtail
                   :2057, error: Unknown error class, error stack:
  MPIDU_Sock_post_connect(1228): unable to connect to Yellowtail yellowtail 
   on port 2057, exhausted all endpoints (errno -1)
  MPIDU_Sock_post_connect(1275): unable to connect to                  on port 2057,
   No connection could be made because the target machine actively refused it. (er
  rno 10061)
  MPIDU_Sock_post_connect(1275): unable to connect to yellowtail on port 2057, No
  connection could be made because the target machine actively refused it. (errno
  10061)
  MPIDU_Sock_post_connect(1275): unable to connect to Yellowtail on port 2057, No
  connection could be made because the target machine actively refused it. (errno
  10061)
  uPMI_ConnectToHost returning PMI_FAIL
  [0] PMI_Init failed.
  Fatal error in MPI_Init: Other MPI error, error stack:
  MPIR_Init_thread(294): Initialization failed
  MPID_Init(83)........: channel initialization failed
  MPID_Init(334).......: PMI_Init returned -1
  >

  In my actual application prog is either a standalone MPI program which I can't change or a non MPI program (in which case test works) . 


  I'd be gratefull for any help.


  Thanks

  Rod Cook
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