[Beowulf] many cores and ib
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Mark Hahn hahn at mcmaster.caTue May 6 20:55:39 PDT 2008
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> messages into one network message. For applications cases, sometimes it > helps with performance and sometimes it does not. OSU have shown both when would a program deliberately send such messages? isn't it something that the program should avoid in the first place? does the MPI optimization apply to messages that differ in source/dest rank and/or tag?
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