[Beowulf] Performance characterising a HPC application
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Ashley Pittman ashley at quadrics.comWed Apr 4 06:13:13 PDT 2007
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Patrick Geoffray wrote: > I would bet that UPC could more efficiently leverage a strided or vector > communication primitive instead of message aggregation. I don't know if > GasNet provides one, I know ARMCI does. GasNet does however get extra credit for having a asynchronous collective, namely barrier. Unfortunately when you read the spec it's actually a special case asynchronous reduce which is almost impossible to optimise anything like as well as barrier which is a shame. Ashley,
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