are the slides of this presentation available? 2009/2/9 Dow Hurst DPHURST <dphu...@uncg.edu>
> Has anyone tested scaling of NAMD/CUDA over QLogic or ConnectX QDR > interconnects for a large number of IB cards and GPUs? I've listened to > John Stone's presentation on VMD and NAMD CUDA acceleration. The consensus > I brought away from the presentation was that one QDR per GPU would probably > be necessary to scale efficiently. The 60 node, 60 GPU, DDR IB enabled > cluster that was used for initial testing was saturating the interconnect. > Later tests on the new GT200 based cards show even more performance gains > for the GPUs. 1 GPU performing the work of 12 CPUs or 8 CPUs equaling 96 > cores were the numbers I saw. So with a ratio of 1gpu/12cores, interconnect > performance will be very important. > Thanks, > Dow > __________________________________ > Dow P. Hurst, Research Scientist > Department of Chemistry and Biochemistry > University of North Carolina at Greensboro > > _______________________________________________ > Beowulf mailing list, Beowulf@beowulf.org > To change your subscription (digest mode or unsubscribe) visit > http://www.beowulf.org/mailman/listinfo/beowulf > >
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