[mpich-discuss] MPICH v3.2 and SLRUM

[Balaji, Pavan]

Looks like SLURM is telling MPICH that two processes are on the same node, even though they are on different nodes.  It looks like a bug in the SLURM PMI implementation.  Did you try simply using mpiexec instead?  You'll need to remove the --with-pmi, --with-pm, and LDFLAGS/LIBS options and rebuild mpich for that.  Note that mpiexec will internally use srun on slurm environments.

  -- Pavan

> On Dec 1, 2015, at 5:56 AM, Andreas Gocht <andreas.gocht at tu-dresden.de> wrote:
> 
> Hey
> 
> I tried to build an use mpich with slurm, sbatch and srun. Unfortunate it looks like MPI_Init doesn't work with srun.
> 
> I got the following error:
> 
> Fatal error in MPI_Init: Other MPI error, error stack:
> MPIR_Init_thread(474).................:
> MPID_Init(190)........................: channel initialization failed
> MPIDI_CH3_Init(89)....................:
> MPID_nem_init(272)....................:
> MPIDI_CH3I_Seg_commit(366)............:
> MPIU_SHMW_Hnd_deserialize(324)........:
> MPIU_SHMW_Seg_open(865)...............:
> MPIU_SHMW_Seg_create_attach_templ(637): open failed - No such file or directory
> In: PMI_Abort(4239887, Fatal error in MPI_Init: Other MPI error, error stack:
> MPIR_Init_thread(474).................:
> MPID_Init(190)........................: channel initialization failed
> MPIDI_CH3_Init(89)....................:
> MPID_nem_init(272)....................:
> MPIDI_CH3I_Seg_commit(366)............:
> MPIU_SHMW_Hnd_deserialize(324)........:
> MPIU_SHMW_Seg_open(865)...............:
> MPIU_SHMW_Seg_create_attach_templ(637): open failed - No such file or directory)
> 
> I configured MPICH with "./configure --prefix=<some/prefix> --with-pmi=slurm --with-pm=none --with-slurm=<path/to/slurm>" and compiled my application with the  "-L<path_to_slurm_lib> -lpmi" command.
> 
> (as described in
> 
> https://wiki.mpich.org/mpich/index.php/Frequently_Asked_Questions#Note_that_the_default_build_of_MPICH_will_work_fine_in_SLURM_environments._No_extra_steps_are_needed.
> 
> and
> 
> https://computing.llnl.gov/linux/slurm/mpi_guide.html#mpich2
> 
> )
> 
> I am running with 10 nodes and one task per node. Is there something I am missing during the configuration of MPICH?
> 
> Best,
> 
> Andreas
> 
> -- 
> M.Sc. Andreas Gocht
> 
> Technische Universität Dresden
> Center for Information Services and
> High Performance Computing (ZIH)
> D-01062 Dresden
> Germany
> 
> Contact:
> Willersbau, Room A 104
> Phone:  (+49) 351 463-36415
> Fax:    (+49) 351 463-3773
> e-mail: andreas.gocht at tu-dresden.de
> 
> 
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