netdev - Re: [PATCH] net: increase receive packet quantum

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Message-ID: <20081103212521.15e12168@extreme>
Date:	Mon, 3 Nov 2008 21:25:21 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	David Miller <davem@...emloft.net>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH] net: increase receive packet quantum

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

> From: Stephen Hemminger <shemminger@...tta.com>
> 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@...tta.com>
> 
> 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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