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Hi Roland,<div><br><div><div>On Aug 30, 2007, at 6:39 PM, Roland Schulz wrote:</div><blockquote type="cite"><blockquote type="cite"><font class="Apple-style-span" color="#000000"><br></font> </blockquote><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I did a performance test on Jaguar (2.6 GHz dual-core Opteron, Cray</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">Seastar router) which is attached. I hope attachments are fine on this</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">list. I did it only on this cluster because I wanted to compare it to</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">the Eleftheriou paper and thus till 2048 and this is the only of this</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">size I have access to at the moment. I think it looks good in</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">comparison, because I didn't do any special optimization. I may be able</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">to do some performance tests on BlueGene to be able to do a direct</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">comparison.</div></blockquote><div><br class="webkit-block-placeholder"></div>That looks great as a starting point. Be aware that we probably want to use real-to-complex transforms though, since that cuts the executing time in half (and, more important, the communication bandwidth requirements).</div><div><blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; min-height: 14px; "><br></div> <blockquote type="cite"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">- In the end we would like to have the copyright of new code, but that</div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">is not of immediate concern, I guess we first need a working code.</div> </blockquote><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">It is GPL so it shouldn't be a problem.</div></blockquote><br></div><div>That is fine if we make it a separate (optional) library. The reason for this is that a couple of projects such as Folding@Home have our permission to ship non-GPL binaries (that create encrypted trajectories so users can't manipulate the science), and if we include GPL-only code we don't have (shared) copyright or free distribution rights to we wouldn't be able to make any exceptions at all.</div><div><br></div><div>Cheers,</div><div><br class="webkit-block-placeholder"></div><div>Erik</div></div></body></html>