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Subject: Re: [OMPI users] SM btl slows down bandwidth?
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2008-08-14 09:28:59


At this time, we are not using non-temporal stores for shared memory
operations.

On Aug 13, 2008, at 11:46 AM, Ron Brightwell wrote:

>> [...]
>>
>> MPICH2 manages to get about 5GB/s in shared memory performance on the
>> Xeon 5420 system.
>
> Does the sm btl use a memcpy with non-temporal stores like MPICH2?
> This can be a big win for bandwidth benchmarks that don't actually
> touch their receive buffers at all...
>
> -Ron
>
>
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-- 
Jeff Squyres
Cisco Systems