On Mon, Jan 30, 2012 at 10:04:53AM -0500, Mark Hahn wrote: > > http://www.cscs.ch/fileadmin/user_upload/customers/cscs/Tech_Reports/Performance_Analysis_IB-QDR_final-2.pdf > > as far as I can tell, this paper mainly says "a coalescing stack delivers > benchmark results showing a lot higher bandwidth and message rate than a > non-coalescing stack." the comment on figure 8: > > To some extent, the environment variables mentioned before > contribute to this outstanding result > > which is remarkably droll. I'm not sure how well coalescing works for real > applications.
Note also that many of the benchmarks in this analysis weren't run using MPI -- if I remember correctly, the ib_* commands mentioned use InfiniBand verbs directly, which means they aren't accellerated on InfiniPath. -- greg _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
