[Beowulf] Performance tuning for Jumbo Frames

Rahul Nabar rpnabar at gmail.com
Sun Dec 13 22:26:52 EST 2009


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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