netdev - Re: HTB accuracy for high speed (and bonding)

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Message-ID: <20090523160207.GB2896@ami.dom.local>
Date:	Sat, 23 May 2009 18:02:07 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Vladimir Ivashchenko <hazard@...ncoudi.com>
Cc:	Eric Dumazet <dada1@...mosbay.com>, netdev@...r.kernel.org
Subject: Re: HTB accuracy for high speed (and bonding)

On Sat, May 23, 2009 at 06:53:21PM +0300, Vladimir Ivashchenko wrote:
> > > > > So, I got rid of bonding completely and instead configured PBR on Cisco
> > > > > + Linux routing in such a way so that packet gets received and
> > > > > transmitted using NICs connected to the same pair of cores with common
> > > > > cache. 65-70% idle on all cores now, compared to 0-30% idle in worst
> > > > > case scenarios before.
...
> > There is not enough data to analyse this, but generally you should aim
> > at maintaining one flow (RX + TX) on the same cpu cache.
> 
> Yep, that's what I did in the end (as per the top paragraph).

So, stop writing: "I'm completely ignorant in internals of kernel
operation" because you're smp expert now! ;-)

Jarek P.
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