Re: [OMPI users] Mpirun --app option not working

Wed, 9 Feb 2011 17:32:57 -0500 

Sindhi, Waris PW wrote:

Hi,
    I am having trouble using the --app option with OpenMPI's mpirun
command. The MPI processes launched with the --app option get launched
on the linux node that mpirun command is executed on.

The same MPI executable works when specified on the command line using
the -np <num-procs> option.

Please let me know what I am doing wrong ?

Bad launch :

head-node % /usr/lib64/openmpi/1.4-gcc/bin/mpirun --host
node1,node1,node2,node2 --app appfile head-node :Hello world from 0 
head-node :Hello world from 3
head-node :Hello world from 1
head-node :Hello world from 2

Good launch :

head-node % /usr/lib64/openmpi/1.4-gcc/bin/mpirun --host
node1,node1,node2,node2 -np 4 mpiinit
node1 :Hello world from 0
node2 :Hello world from 2
node2 :Hello world from 3
node1 :Hello world from 1

head-node % cat appfile
-np 1 /home/user461/OPENMPI/mpiinit
-np 1 /home/user461/OPENMPI/mpiinit
-np 1 /home/user461/OPENMPI/mpiinit
-np 1 /home/user461/OPENMPI/mpiinit

head-node % cat mpiinit.c
#include <mpi.h>
#include <stdio.h>

int main(int argc, char** argv)
{
    int rc, me;
    char pname[MPI_MAX_PROCESSOR_NAME];
    int plen;

    MPI_Init(
       &argc,
       &argv
    );

    rc = MPI_Comm_rank(
            MPI_COMM_WORLD,
            &me
    );

    if (rc != MPI_SUCCESS)
    {
       return rc;
    }

    MPI_Get_processor_name(
       pname,
       &plen
    );

    printf("%s:Hello world from %d\n", pname, me);

    MPI_Finalize();

    return 0;
}


head-node % /usr/lib64/openmpi/1.4-gcc/bin/ompi_info
                 Package: Open MPI
mockbu...@x86-004.build.bos.redhat.com Distribution
                Open MPI: 1.4
   Open MPI SVN revision: r22285
   Open MPI release date: Dec 08, 2009
                Open RTE: 1.4
   Open RTE SVN revision: r22285
   Open RTE release date: Dec 08, 2009
                    OPAL: 1.4
       OPAL SVN revision: r22285
       OPAL release date: Dec 08, 2009
            Ident string: 1.4
                  Prefix: /usr/lib64/openmpi/1.4-gcc
 Configured architecture: x86_64-unknown-linux-gnu
          Configure host: x86-004.build.bos.redhat.com
           Configured by: mockbuild
           Configured on: Tue Feb 23 12:39:24 EST 2010
          Configure host: x86-004.build.bos.redhat.com
                Built by: mockbuild
                Built on: Tue Feb 23 12:41:54 EST 2010
              Built host: x86-004.build.bos.redhat.com
              C bindings: yes
            C++ bindings: yes
      Fortran77 bindings: yes (all)
      Fortran90 bindings: yes
 Fortran90 bindings size: small
              C compiler: gcc
     C compiler absolute: /usr/bin/gcc
            C++ compiler: g++
   C++ compiler absolute: /usr/bin/g++
      Fortran77 compiler: gfortran
  Fortran77 compiler abs: /usr/bin/gfortran
      Fortran90 compiler: gfortran
  Fortran90 compiler abs: /usr/bin/gfortran
             C profiling: yes
           C++ profiling: yes
     Fortran77 profiling: yes
     Fortran90 profiling: yes
          C++ exceptions: no
          Thread support: posix (mpi: no, progress: no)
           Sparse Groups: no
  Internal debug support: no
     MPI parameter check: runtime
Memory profiling support: no
Memory debugging support: no
         libltdl support: yes
   Heterogeneous support: no
 mpirun default --prefix: yes
         MPI I/O support: yes
       MPI_WTIME support: gettimeofday
Symbol visibility support: yes
   FT Checkpoint support: no  (checkpoint thread: no)
           MCA backtrace: execinfo (MCA v2.0, API v2.0, Component v1.4)
              MCA memory: ptmalloc2 (MCA v2.0, API v2.0, Component v1.4)
           MCA paffinity: linux (MCA v2.0, API v2.0, Component v1.4)
               MCA carto: auto_detect (MCA v2.0, API v2.0, Component
v1.4)
               MCA carto: file (MCA v2.0, API v2.0, Component v1.4)
           MCA maffinity: first_use (MCA v2.0, API v2.0, Component v1.4)
           MCA maffinity: libnuma (MCA v2.0, API v2.0, Component v1.4)
               MCA timer: linux (MCA v2.0, API v2.0, Component v1.4)
         MCA installdirs: env (MCA v2.0, API v2.0, Component v1.4)
         MCA installdirs: config (MCA v2.0, API v2.0, Component v1.4)
                 MCA dpm: orte (MCA v2.0, API v2.0, Component v1.4)
              MCA pubsub: orte (MCA v2.0, API v2.0, Component v1.4)
           MCA allocator: basic (MCA v2.0, API v2.0, Component v1.4)
           MCA allocator: bucket (MCA v2.0, API v2.0, Component v1.4)
                MCA coll: basic (MCA v2.0, API v2.0, Component v1.4)
                MCA coll: hierarch (MCA v2.0, API v2.0, Component v1.4)
                MCA coll: inter (MCA v2.0, API v2.0, Component v1.4)
                MCA coll: self (MCA v2.0, API v2.0, Component v1.4)
                MCA coll: sm (MCA v2.0, API v2.0, Component v1.4)
                MCA coll: sync (MCA v2.0, API v2.0, Component v1.4)
                MCA coll: tuned (MCA v2.0, API v2.0, Component v1.4)
                  MCA io: romio (MCA v2.0, API v2.0, Component v1.4)
               MCA mpool: fake (MCA v2.0, API v2.0, Component v1.4)
               MCA mpool: rdma (MCA v2.0, API v2.0, Component v1.4)
               MCA mpool: sm (MCA v2.0, API v2.0, Component v1.4)
                 MCA pml: cm (MCA v2.0, API v2.0, Component v1.4)
                 MCA pml: csum (MCA v2.0, API v2.0, Component v1.4)
                 MCA pml: ob1 (MCA v2.0, API v2.0, Component v1.4)
                 MCA pml: v (MCA v2.0, API v2.0, Component v1.4)
                 MCA bml: r2 (MCA v2.0, API v2.0, Component v1.4)
              MCA rcache: vma (MCA v2.0, API v2.0, Component v1.4)
                 MCA btl: ofud (MCA v2.0, API v2.0, Component v1.4)
                 MCA btl: openib (MCA v2.0, API v2.0, Component v1.4)
                 MCA btl: self (MCA v2.0, API v2.0, Component v1.4)
                 MCA btl: sm (MCA v2.0, API v2.0, Component v1.4)
                 MCA btl: tcp (MCA v2.0, API v2.0, Component v1.4)
                MCA topo: unity (MCA v2.0, API v2.0, Component v1.4)
                 MCA osc: pt2pt (MCA v2.0, API v2.0, Component v1.4)
                 MCA osc: rdma (MCA v2.0, API v2.0, Component v1.4)
                 MCA iof: hnp (MCA v2.0, API v2.0, Component v1.4)
                 MCA iof: orted (MCA v2.0, API v2.0, Component v1.4)
                 MCA iof: tool (MCA v2.0, API v2.0, Component v1.4)
                 MCA oob: tcp (MCA v2.0, API v2.0, Component v1.4)
                MCA odls: default (MCA v2.0, API v2.0, Component v1.4)
                 MCA ras: gridengine (MCA v2.0, API v2.0, Component
v1.4)
                 MCA ras: slurm (MCA v2.0, API v2.0, Component v1.4)
               MCA rmaps: load_balance (MCA v2.0, API v2.0, Component
v1.4)
               MCA rmaps: rank_file (MCA v2.0, API v2.0, Component v1.4)
               MCA rmaps: round_robin (MCA v2.0, API v2.0, Component
v1.4)
               MCA rmaps: seq (MCA v2.0, API v2.0, Component v1.4)
                 MCA rml: oob (MCA v2.0, API v2.0, Component v1.4)
              MCA routed: binomial (MCA v2.0, API v2.0, Component v1.4)
              MCA routed: direct (MCA v2.0, API v2.0, Component v1.4)
              MCA routed: linear (MCA v2.0, API v2.0, Component v1.4)
                 MCA plm: rsh (MCA v2.0, API v2.0, Component v1.4)
                 MCA plm: slurm (MCA v2.0, API v2.0, Component v1.4)
               MCA filem: rsh (MCA v2.0, API v2.0, Component v1.4)
              MCA errmgr: default (MCA v2.0, API v2.0, Component v1.4)
                 MCA ess: env (MCA v2.0, API v2.0, Component v1.4)
                 MCA ess: hnp (MCA v2.0, API v2.0, Component v1.4)
                 MCA ess: singleton (MCA v2.0, API v2.0, Component v1.4)
                 MCA ess: slurm (MCA v2.0, API v2.0, Component v1.4)
                 MCA ess: tool (MCA v2.0, API v2.0, Component v1.4)
             MCA grpcomm: bad (MCA v2.0, API v2.0, Component v1.4)
             MCA grpcomm: basic (MCA v2.0, API v2.0, Component v1.4)


Sincerely,

Waris Sindhi
High Performance Computing, TechApps
Pratt & Whitney, UTC
(860)-565-8486



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Hi Waris

I think the appfile syntax includes the hosts part (and anything
else you want to pass to mpiexec):

-host node1 -np 1 /home/user461/OPENMPI/mpiinit
-host node2 -np 1 /home/user461/OPENMPI/mpiinit
...

Then the mpiexec command just lists the appfile:

mpiexec --app appfile

It works for me here (with the caveat that I am
running under Torque/PBS).


Also, 'man mpiexec' says:

       --app <appfile>
              Provide an appfile, ignoring all other command line options.

**
So, I suppose this means that all information passed to mpiexec must
be inside the appfile, anything else will be ignored.
This may explain why your 'bad launch' ran on the headnode,
which is probably the default machine.
(It would be great if the OpenMPI folks added a few examples there,
specially for people who run MIMD programs.  :) )

But, you know, these are only my guesses, guesses, guesses ...

I hope this helps,
Gus Correa

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