<div>
<div>Hi,</div>
<div>There is a rank 367 which achieve 79.97% efficiency.<br> </div></div>
<div> </div>
<div>i'm using Infiniband to connect 2 nodes. each node has 8G memory and dual AMD opteron 250.</div>
<div>i just tried Intel Compiler + GOTO, it just got a 60% efficiency which have a large difference with my target.</div>
<div>maybe i need to try Pathscale or PGI compiler.</div>
<div>any suggestion?</div>
<div>thanks a lot.</div>
<div> </div>
<div>PN</div>
<div><br> </div>
<div><span class="gmail_quote">2006/9/22, Craig Tierney <<a href="mailto:ctierney@hypermall.net">ctierney@hypermall.net</a>>:</span>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Lai Dragonfly wrote:<br>> Dear all,<br>><br>> I'm doing the HPL benchmark on several nodes of AMD opteron platform but
<br>> may expand to hundred of nodes later.<br>> i hope to get around 80% efficiency.<br><br>What is your interconnect? 80% may be a bit high. You should look<br>at the Top500 list to see what the efficiencies of other systems
<br>similar to yours.<br><br><br>> Anyone has good suggestions of combination of compiler (appreciate if<br>> includes compiler flags) + math lib on AMD platforms?<br>> thanks a lot.<br>><br><br>Compiler and flags don't matter. HPL spends about
99.999% of its<br>time in BLAS. Use GotoBLAS, it is very fast.<br><br>What is most important is settings in the HPL.dat file. Use google to<br>find some good settings or someone else can provide one. I don't have<br>access to one right now.
<br><br>Craig<br>on the list may be able<br><br><br><br><br>> PN<br>><br>><br>> ------------------------------------------------------------------------<br>><br>> _______________________________________________
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