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Subject: Re: [OMPI devel] SM backing file size
From: Ralph Castain (rhc_at_[hidden])
Date: 2008-11-12 14:03:01


Thanks - Brad also responded off-list. Problem was that our /tmp file
constraint was quite a bit smaller.

On Nov 12, 2008, at 11:58 AM, Pak Lui wrote:

> Ralph, is it not the mpool_sm_max_size? 512MB seems to be the
> default max size per node.
>
> devel-request_at_[hidden] wrote:
>> Message: 1
>> Date: Wed, 12 Nov 2008 07:21:38 -0700
>> From: Ralph Castain <rhc_at_[hidden]>
>> Subject: [OMPI devel] SM backing file size
>> To: Open MPI Developers <devel_at_[hidden]>
>> Message-ID: <A19CEFFE-C532-4B2E-999E-0815F579340C_at_[hidden]>
>> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
>> Yo folks
>> As has frequently been commented upon at one time or another, the
>> shared memory backing file can be quite huge. There used to be a
>> param for controlling this size, but I can't find it in 1.3 - or
>> at least, the name or method for controlling file size has morphed
>> into something I don't recognize.
>> Can someone more familiar with that subsystem point me to one or
>> more params that will allow us to control the size of that file?
>> It is swamping our systems and causing OMPI to segfault.
>> Thanks
>> Ralph
>
> --
> Regards,
>
> - Pak Lui
> plui_at_[hidden]
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