Re: [PATCH] net: increase receive packet quantum

From: Stephen Hemminger
Date: Tue Nov 04 2008 - 00:25:36 EST


On Mon, 03 Nov 2008 17:24:28 -0800 (PST)
David Miller <davem@xxxxxxxxxxxxx> wrote:

> From: Stephen Hemminger <shemminger@xxxxxxxxxx>
> Date: Mon, 3 Nov 2008 13:03:03 -0800
>
> > This patch gets about 1.25% back on tbench regression.
> >
> > My change to NAPI for multiqueue support changed the time limit on
> > network receive processing. Under sustained loads like tbench, this
> > can cause the receiver to reschedule prematurely.
> >
> > Signed-off-by: Stephen Hemminger <shemminger@xxxxxxxxxx>
>
> I think I'm the guilty party that made that change to your
> NAPI patches.
>
> I'll apply this to net-next-2.6, thanks Stephen.

Maybe you want it as part of the tbench regression recovery in 2.6.28?
it seems mostly harmless.
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