From owner-freebsd-net@FreeBSD.ORG  Tue Mar  2 14:24:11 2004
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 731C916A4CF; Tue,  2 Mar 2004 14:24:11 -0800 (PST)
Received: from cell.sick.ru (cell.sick.ru [217.72.144.68])
	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 9596943D31; Tue,  2 Mar 2004 14:24:10 -0800 (PST)
	(envelope-from glebius@cell.sick.ru)
Received: from cell.sick.ru (glebius@localhost [127.0.0.1])
	by cell.sick.ru (8.12.9/8.12.8) with ESMTP id i22MO7QE029458
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Wed, 3 Mar 2004 01:24:08 +0300 (MSK)
	(envelope-from glebius@cell.sick.ru)
Received: (from glebius@localhost)
	by cell.sick.ru (8.12.9/8.12.6/Submit) id i22MO6sT029457;
	Wed, 3 Mar 2004 01:24:06 +0300 (MSK)
Date: Wed, 3 Mar 2004 01:24:06 +0300
From: Gleb Smirnoff <glebius@cell.sick.ru>
To: Randy Bush <randy@psg.com>
Message-ID: <20040302222406.GA29412@cell.sick.ru>
Mail-Followup-To: Gleb Smirnoff <glebius@cell.sick.ru>,
	Randy Bush <randy@psg.com>, Andre Oppermann <andre@freebsd.org>,
	Wes Peters <wes@softweyr.com>, freebsd-net@freebsd.org,
	freebsd-current@freebsd.org, Kris Kennaway <kris@obsecurity.org>
References: <20040302031625.GA4061@scylla.towardex.com>
	<20040302042957.GH3841@saboteur.dek.spc.org>
	<20040302082625.GE22985@cell.sick.ru>
	<20040302084321.GA21729@xor.obsecurity.org>
	<20040302085556.GA23734@cell.sick.ru>
	<20040302092825.GD884@saboteur.dek.spc.org>
	<20040302095134.GA24078@cell.sick.ru> <40449B8E.A48B39B0@freebsd.org>
	<20040302160902.GB26977@cell.sick.ru>
	<200403022216.i22MGVQE029400@cell.sick.ru>
Mime-Version: 1.0
Content-Type: text/plain; charset=koi8-r
Content-Disposition: inline
In-Reply-To: <200403022216.i22MGVQE029400@cell.sick.ru>
User-Agent: Mutt/1.5.6i
cc: Kris Kennaway <kris@obsecurity.org>
cc: freebsd-current@freebsd.org
cc: Andre Oppermann <andre@freebsd.org>
cc: freebsd-net@freebsd.org
Subject: Re: My planned work on networking stack
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 02 Mar 2004 22:24:11 -0000

On Tue, Mar 02, 2004 at 02:16:13PM -0800, Randy Bush wrote:
R> > I do not insist that AS pathes in kernel are good idea. If you
R> > show me an other way to get AS information when constructing
R> > netflow exports in kernel, I'd be thankful.
R> 
R> do we need to rediscover why flow export places a large processor
R> burden on criscos, junipers, prockets, ...?

  Not because of AS path info, definitely. Netflow does route lookup
anyway to get nexthop and route masks. If route lookup will return
a pointer to a structure with one more field it will not introduce
ant additional load.
  My experience shows, that most load in flow processing is caused
by: 1) memory allocation, 2) expiry lookups.

-- 
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE