From owner-freebsd-net  Thu May  3  8:26:17 2001
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Date: Thu, 3 May 2001 08:26:14 -0700
From: Jason R Thorpe <thorpej@zembu.com>
To: Luigi Rizzo <luigi@info.iet.unipi.it>
Cc: Gunther Schadow <gunther@aurora.regenstrief.org>,
	Darren Reed <darrenr@reed.wattle.id.au>, snap-users@kame.net,
	julian@elischer.org, freebsd-net@freebsd.org,
	ipfilter@coombs.anu.edu.au, altq@csl.sony.co.jp
Subject: Re: [altq 838] Re: The future of ALTQ, IPsec & IPFILTER playing together ...
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Mail-Followup-To: Jason R Thorpe <thorpej@zembu.com>,
	Luigi Rizzo <luigi@info.iet.unipi.it>,
	Gunther Schadow <gunther@aurora.regenstrief.org>,
	Darren Reed <darrenr@reed.wattle.id.au>, snap-users@kame.net,
	julian@elischer.org, freebsd-net@freebsd.org,
	ipfilter@coombs.anu.edu.au, altq@csl.sony.co.jp
References: <3AF108F2.BA4AF637@aurora.regenstrief.org> <200105030750.JAA44246@info.iet.unipi.it>
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In-Reply-To: <200105030750.JAA44246@info.iet.unipi.it>; from luigi@info.iet.unipi.it on Thu, May 03, 2001 at 09:50:25AM +0200
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On Thu, May 03, 2001 at 09:50:25AM +0200, Luigi Rizzo wrote:

 > wrong. It is an interpreted bytecode, much slower than,
 > say, approaches which translate individual filters into
 > native machine code (DPT/DPF ? don't remember the exact reference,
 > it was some usenix/sigcomm paper).

The fact that BPF does not currently synthesize into native instructions
is orthogonal to the BPF instruction set.  On my long-term TODO list for
PACE (my packet classification engine) is a BPF -> CPU translator.

-- 
        -- Jason R. Thorpe <thorpej@zembu.com>

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