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From: Brock Palen (brockp_at_[hidden])
Date: 2007-02-13 13:30:28


On Feb 13, 2007, at 12:55 PM, Troy Telford wrote:

> First, the good news:
> I've recently tried PBS Pro 8 with Open MPI 1.1.4.
>
> At least with PBS Pro version 8, you can (finally) do a dynamic/shared
> object for the TM module, rather than having to compile everything
> statically. (So the FAQ needs a minor update.) The jobs seem to
> run and
> use TM properly.

Good,

>
> The bad news:
> My memory is a bit fuzzy on how to use OMPI with PBS and cousins.
> Sad, I
> know, but that doesn't make it any less true.

Make sure your OMPI build used --with-tm=/path/to/pbs

You can also use ompi_info and grep for tm.

>
> For the moment, I've read the FAQ and see that you need to use the
> '-np
> <foo>' option to specify the number of processes. For some reason, I
> recall that OMPI used to be able to get the number of processes to run
> from PBS; am I just 'remembering' something that never existed?

To my memory this has never been the case. there is $PBS_NODEFILE
which you can wrap around:

CPUS=`cat $PBS_NODEFILE | wc -l`

mpirun -np $CPUS myexe

> --
> Troy Telford
> _______________________________________________
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> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
>

Brock Palen
Center for Advanced Computing
brockp_at_[hidden]
(734)936-1985