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Subject: Re: [OMPI users] openmpi shared memory feature
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2012-10-27 12:19:34

On Oct 27, 2012, at 10:49 AM, Mahmood Naderan wrote:

> Why openmpi uses shared memory model?

Because communicating through shared memory when sending messages between processes on the same server is far faster than going through a network stack.

> this can be disabled though by setting "--mca ^sm".
> It seems that by default openmpi uses such feature (shared memory backing files) which is strange.
> Regards,
> Mahmood
> _______________________________________________
> users mailing list
> users_at_[hidden]

Jeff Squyres
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