[Beowulf] Performance tuning for Jumbo Frames
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Rahul Nabar rpnabar at gmail.comSun Dec 13 19:26:52 PST 2009
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On Sat, Dec 12, 2009 at 10:40 AM, Patrick Geoffray <patrick at myri.com> wrote: > Rahul, > > Rahul Nabar wrote: >> >> I have seen a considerable performance boost for my codes by using >> Jumbo Frames. But are there any systematic tools or strategies to >> select the optimum MTU size? > > There is no optimal MTU size. This is the maximum payload you can fit in one > packet, so there is no drawback to a bigger MTU. Thanks! So I could push it beyond 9000 as well? Reason is I've seen a steady boost in performance so far. 1500 < 4000 < 9000. Maybe my performance continues to increase beyond 9000 too? -- Rahul
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