[Beowulf] AMD Opteron Linpack Benchmark

Lai Dragonfly poknam at gmail.com
Fri Sep 22 02:55:28 EDT 2006


 Hi,
There is a rank 367 which achieve 79.97% efficiency.


i'm using Infiniband to connect 2 nodes. each node has 8G memory and dual
AMD opteron 250.
i just tried Intel Compiler + GOTO, it just got a 60% efficiency which have
a large difference with my target.
maybe i need to try Pathscale or PGI compiler.
any suggestion?
thanks a lot.

PN


2006/9/22, Craig Tierney <ctierney at hypermall.net>:
>
> Lai Dragonfly wrote:
> > Dear all,
> >
> > I'm doing the HPL benchmark on several nodes of AMD opteron platform but
> > may expand to hundred of nodes later.
> > i hope to get around 80% efficiency.
>
> What is your interconnect?  80% may be a bit high.  You should look
> at the Top500 list  to see what the efficiencies of other systems
> similar to yours.
>
>
> > Anyone has good suggestions of combination of compiler (appreciate if
> > includes compiler flags) + math lib on AMD platforms?
> > thanks a lot.
> >
>
> Compiler and flags don't matter.  HPL spends about 99.999% of its
> time in BLAS.  Use GotoBLAS, it is very fast.
>
> What is most important is settings in the HPL.dat file.  Use google to
> find some good settings or someone else can provide one.  I don't have
> access to one right now.
>
> Craig
> on the list may be able
>
>
>
>
> > PN
> >
> >
> > ------------------------------------------------------------------------
> >
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>
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