[Beowulf] hpl size problems
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Mark Hahn hahn at physics.mcmaster.caWed Sep 28 07:46:59 PDT 2005
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> workstations, because of both security and performance. Things like > ipchains or ipfilters tend to be "expensive" overhead on all TCP/UDP > connections, and overhead in parallel computations is anathema. So one has anyone actually measured this? I suspect that the marginal overhead for iptables is ~1 us, and at least with gigabit, that's almost in the noise (say 3%). I don't think anyone who is satisfied with gigabit would care...
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