[Beowulf] Re: Matrix Multiply

Tom Elken elken at pathscale.com
Wed Feb 8 12:51:08 PST 2006

> From: tjue1 at sussex.ac.uk
> Subject: [Beowulf] Matrix Multiply
> To: beowulf at beowulf.org
> Message-ID: <1139324912.43e8b7f030fc3 at webmail.sussex.ac.uk>
> Content-Type: text/plain; charset=ISO-8859-1
> Hi Guys
> This is a quick question regarding the xhpl benchmark. 

I assume you mean the HPL benchmark.  xhpl is its executable name.

> Im no
> mathematician but im trying to understand how the benchmark operates. 
> I would like to test my system by seeing how many FLOPS are achieved
> using only the Matrix Multiply.

You could probably download the HPC Challenge benchmark (from 
http://icl.cs.utk.edu/hpcc/software/index.html )  and cut-paste some code from 
it's DGEMM (Double-precision, GEneral Matrix-Multiply) sub-benchmark as a 
relatively easy way to get a test program for matrix-multiply.

DGEMM is typically ~90% or more of the HPL benchmark's profile.


> Is there a way to configure the benchmark so that only the Matrix
> Multiply routines are run? does it only perform a Matrix Multiply? Im
> sorry for such a lame question but its not clear to me from the
> documentation.
> Thanks for looking
> Matt

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