netdev - Re: multi bpf filter will impact performance?

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Message-ID: <1291192967.2856.492.camel@edumazet-laptop>
Date:	Wed, 01 Dec 2010 09:42:47 +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 16:15 +0800, Changli Gao a écrit :
> On Wed, Dec 1, 2010 at 4:09 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> >
> > A dream would be to have a native compiler, and not interpret pseudo
> > code...
> >
> 
> FYI: FreeBSD's BPF implementation have JIT compilers in kernel on both
> i386 and amd64.
> 

IMHO, a better pcap optimizer would be the first step.

If you take a look at their generated code, its not a real win over the
code we currently have.

Really.

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