[mpich-discuss] Run MPICH without mpiexec

[Jackey Yan]

Hi Kenneth, 

=== Here is my MPICH info=== 
HYDRA build details:
    Version:                                 3.1
    Release Date:                            Thu Feb 20 11:41:13 CST 2014
    CC:                              gcc
    CXX:                             g++
    F77:                             gfortran
    F90:                             gfortran
    Configure options:                       '--disable-option-checking' '--prefix=/icd/placement/zyan/tools/mpitch-install' '-enable-fast' '--cache-file=/dev/null' '--srcdir=/icd/placement/zyan/tools/DOWNLOAD/mpich-3.1/src/pm/hydra' 'CC=gcc' 'CFLAGS= -DNDEBUG -DNVALGRIND -O2' 'LDFLAGS= ' 'LIBS=-lrt -lpthread ' 'CPPFLAGS= -I/icd/placement/zyan/tools/build/mpich-3.1/src/mpl/include -I/icd/placement/zyan/tools/DOWNLOAD/mpich-3.1/src/mpl/include -I/icd/placement/zyan/tools/DOWNLOAD/mpich-3.1/src/openpa/src -I/icd/placement/zyan/tools/build/mpich-3.1/src/openpa/src -I/icd/placement/zyan/tools/build/mpich-3.1/src/mpi/romio/include'
    Process Manager:                         pmi
    Launchers available:                     ssh rsh fork slurm ll lsf sge manual persist
    Topology libraries available:            hwloc
    Resource management kernels available:   user slurm ll lsf sge pbs cobalt
    Checkpointing libraries available:
    Demux engines available:                 poll select

=== Here is partial sample of my code===
  int world_size, universe_size, *universe_sizep, flag, rank; 
   MPI_Comm everyone;           /* intercommunicator */ 
   char worker_program[100]; 
   char hostname[1024];
   gethostname(hostname, 1024);
   std::cout << "Hi, I'm the master.  host: " << hostname << "  pid: " << getpid() << std::endl;
   MPI_Init(&argc, &argv); 
   MPI_Comm_size(MPI_COMM_WORLD, &world_size); 
   MPI_Comm_rank(MPI_COMM_WORLD, &rank);

   std::cout << "Hi, I'm the master again.  host: " << hostname << "  rank: " << rank 
	     << ".  pid: " << getpid() << " world_size: " << world_size << std::endl;

   if (world_size != 1)    std::cout << "Top heavy with management" << std::endl;
   MPI_Comm_get_attr(MPI_COMM_WORLD, MPI_UNIVERSE_SIZE,  
                &universe_sizep, &flag);  
........

=== Here is the error message I got without using mpiexec===
Hi, I'm the master.  host: place37  pid: 31698
Hi, I'm the master again.  host: place37  rank: 0.  pid: 31698 world_size: 1
[mpiexec at place37] match_arg (/icd/placement/zyan/tools/DOWNLOAD/mpich-3.1/src/pm/hydra/utils/args/args.c:159): unrecognized argument pmi_args
[mpiexec at place37] HYDU_parse_array (/icd/placement/zyan/tools/DOWNLOAD/mpich-3.1/src/pm/hydra/utils/args/args.c:174): argument matching returned error
[mpiexec at place37] parse_args (/icd/placement/zyan/tools/DOWNLOAD/mpich-3.1/src/pm/hydra/ui/mpich/utils.c:1596): error parsing input array
[mpiexec at place37] HYD_uii_mpx_get_parameters (/icd/placement/zyan/tools/DOWNLOAD/mpich-3.1/src/pm/hydra/ui/mpich/utils.c:1648): unable to parse user arguments
[mpiexec at place37] main (/icd/placement/zyan/tools/DOWNLOAD/mpich-3.1/src/pm/hydra/ui/mpich/mpiexec.c:153): error parsing parameters


Looks like the error happens in the code line of calling MPI_Comm_get_attr().

Thanks, 

Jackey

-----Original Message-----
From: discuss-bounces at mpich.org [mailto:discuss-bounces at mpich.org] On Behalf Of Kenneth Raffenetti
Sent: Thursday, April 10, 2014 11:08 AM
To: discuss at mpich.org
Subject: Re: [mpich-discuss] Run MPICH without mpiexec

MPICH supports these dynamic process features. Can you tell us more 
information about your version of MPICH and provide a small example code 
that can reproduce the error you are getting?

On 04/10/2014 01:00 PM, Jackey Yan wrote:
> Hi everyone,
>
> In MPICH, do I have to use mpiexec in the command line, in order to
> launch a MPI run?
>
> I know that in MPI-2 standard, it supports the “dynamic process”
> feature, i.e., dynamically generate/spawn processes from existing
> singleton process.
>
> So it is not required to use mpiexec/mpirun in the command line, in
> order to launch a singleton MPI.
>
> But, I tried to run without mpiexec in MPICH, but it error out when
> parsing the arguments in Hydra…
>
> Thanks,
>
> Jackey
>
> 	
>
>
>
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