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Subject: Re: [OMPI users] How can I pass my user limits (stacksize, etc.) to mpirun in OpenMPI
From: Amidu Oloso (amidu.o.oloso_at_[hidden])
Date: 2008-09-10 10:31:13


Jeff and Samuel,

Thanks for your responses.

-Hamid

Jeff Squyres wrote:
> 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
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>
>