Andrew Gallatin wrote:
> Garrett D'Amore wrote:
> > I agree with Dana's sentiments here.
> >
> > I'll add one thing, from my own experience: in my own experience the
> > pain and suffering of dealing with scatter/gather is not justified on
> > modern systems with ordinary sized ethernet frames. In fact, experience
>
> You might want to amend this with "on slow networks." For
> 10GbE or faster, (and maybe even 1GbE on old, slow hardware)
> s/g is definitely worth it.
>
> Just this morning I doing some tests on a fairly recent 8-way AMD64
> with uperf. Copying rather than mapping roughly doubles CPU
> utilization (20% -> 40%) as reported by vmstat for 8 threads sending
> on a 10GbE interface (bandwidth is 10GbE line rate regardless).
>
What MTU?
-- Garrett
> Drew
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