[Beowulf] IB DDR: mvapich2 vs mvapich performance

Mikhail Kuzminsky kus at free.net
Thu Apr 24 08:43:17 EDT 2008


In message from Eric Thibodeau <kyron at neuralbs.com> (Wed, 23 Apr 2008 
16:48:04 -0400):
>Mikhail Kuzminsky wrote:
>> In message from Greg Lindahl <lindahl at pbm.com> (Wed, 23 Apr 2008 
>> 00:36:44 -0700):
>>> On Wed, Apr 23, 2008 at 07:04:51AM +0400, Mikhail Kuzminsky wrote:
>>>
>>>> Is this throughput difference the result of MPI-2 vs MPI 
>>>> implementation or should I beleive that this difference (about 4% 
>>>> for my mvapich vs mvapich2 at SC'07 ) is not significant  - in the 
>>>> sense that it is simple because of some measurement errors 
>>>> (inaccuracies)? 
>>>
>>> I dunno, does it help your real applications?
>>
>> Significantly - of course, not :-) But our application is really 
>> bounded by throughput !
>Throughput or latency?

Throughput ! osu_bw was interesting just for bandwidth ;-)

Mikhail

>>
>> Yours
>> Mikhail
>>>
>>> -- greg
>>>
>
>Eric

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