netdev - Re: multi bpf filter will impact performance?

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Message-ID: <1291189649.2856.478.camel@edumazet-laptop>
Date:	Wed, 01 Dec 2010 08:47:29 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Changli Gao <xiaosuo@...il.com>
Cc:	Rui <wirelesser@...il.com>, netdev@...r.kernel.org
Subject: Re: multi bpf filter will impact performance?

Le mercredi 01 décembre 2010 à 15:36 +0800, Changli Gao a écrit :
> On Wed, Dec 1, 2010 at 11:48 AM, Rui <wirelesser@...il.com> wrote:
> > one more question is
> >
> > if  RPS can spread the load into 4 separate cpus, how about the
> > "packet_rcv(or tpacket_rcv)" ? will they run in parallel?
> >
> 
> You mentioned RPS. But the current bpf doesn't have an instruction to
> get the current CPU number. You can try this patch attached.
> 
> Maybe we can leverage the bpf and SO_REUSEPORT to direct the traffic
> to the socket instance on the local CPU.
> 

Oh well, it seems you read over my neck, I was preparing a patch with
SKF_AD_RXHASH and SKF_AD_CPU




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