[Beowulf] Benchmarking?

Philippe Blaise philippe.blaise at cea.fr
Thu Jul 29 03:56:18 EDT 2004


daniel.kidger at quadrics.com wrote:

>>-----Original Message-----
>>From: Jack C [mailto:jack at crepinc.com]
>>Sent: 28 July 2004 19:58
>>To: Jack C
>>Cc: beowulf at beowulf.org
>>Subject: Re: [Beowulf] Benchmarking?
>>
>>
>>I was just told about linpack, and that it was good. And 
>>apperantly there is 
>>an MPI implementation thereof, but I sure can't find it... 
>>the MPI standard 
>>site is not very informative. :(
>>
>>Anyone know where to find that, or any other good ones?
>>    
>>
>
>sigh.
>
>Linpack is ubiquitous - just look for 'xhpl' in Google.
>It will take you to http://www.netlib.org/benchmark/hpl/
>Unfortunately this benchmark does not test all aspects of a high performance cluster. Most notably it doesn't really stress MPI, such that most high performance interconnect solutions (IBA, Myrinet, Quadrics et al. [*])  would give fairly similar performance figures.
>
>
>Yours,
>Daniel.
>
>ps. [*] yes I do work for one of those vendors
>
>--------------------------------------------------------------
>Dr. Dan Kidger, Quadrics Ltd.      daniel.kidger at quadrics.com
>One Bridewell St., Bristol, BS1 2AA, UK         0117 915 5505
>----------------------- www.quadrics.com --------------------> 
>
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>  
>
Everyone knows that linpack perf is more or less equal to the number of 
cpus x gemm perf,
that's why cheap linux clusters are compared to Quadrics clusters, or 
even X1, SX6 machines !
But what could we suggest to definitively replace this old and stupid 
and political benchmark ?
may be a boycott ?

  Philippe Blaise.

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