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Subject: Re: [OMPI users] How can I pass my user limits (stacksize, etc.) to mpirun in OpenMPI
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-09-10 08:02:31


If you need per-job settings, then a wrapper is probably your best bet.

On Sep 10, 2008, at 5:08 AM, Samuel Sarholz wrote:

> Hi Jeff,
>
> I think setting global limits will not help in this case as the
> limits like stacksize need to be program specific.
>
>
> So far I am using wrappers, however the solution is a bit nasty.
> If there is another way it would be great.
>
> Hoever I doubt that there is a way as the FAQ states:
>
> More specifically -- it may not be sufficient to simply execute the
> following, because the ulimit may not be in effect on all nodes
> where Open MPI processes will be run:
> shell$ ulimit -l unlimited
> shell$ mpirun -np 2 my_mpi_application
>
> But this case is what is needed as any global or user global (bashrc
> zshrc .. ) setting will only work if you run one kind of jobs at the
> same time.
>
> And wrapping:
> wrap.sh:
> ulimit -s 300000
> a.out
>
> mpirun -np 2 zsh -c wrap.sh
>
> works but is not nice.
>
> best regards,
> Samuel
>
> Jeff Squyres wrote:
>> There are several factors that can come into play here. See this
>> FAQ entry about registered memory limits (the same concepts apply
>> to the other limits):
>> http://www.open-mpi.org/faq/?category=openfabrics#ib-locked-pages-more
>> On Sep 9, 2008, at 7:04 PM, Amidu Oloso wrote:
>>> mpirun under OpenMPI is not picking the limit settings from the
>>> user environment. Is there a way to do this, short of wrapping my
>>> executable in a script where my limits are set and then invoking
>>> mpirun on that script?
>>>
>>> Thanks.
>>>
>>> -Hamid
>>> _______________________________________________
>>> users mailing list
>>> users_at_[hidden]
>>> http://www.open-mpi.org/mailman/listinfo.cgi/users
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-- 
Jeff Squyres
Cisco Systems