From owner-freebsd-net@FreeBSD.ORG  Wed Feb 22 08:43:49 2006
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
X-Original-To: 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 CF4A516A422
	for <freebsd-net@freebsd.org>; Wed, 22 Feb 2006 08:43:49 +0000 (GMT)
	(envelope-from thompsa@freebsd.org)
Received: from dbmail-mx1.orcon.net.nz (loadbalancer1.orcon.net.nz
	[219.88.242.3]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2ECCC43D48
	for <freebsd-net@freebsd.org>; Wed, 22 Feb 2006 08:43:48 +0000 (GMT)
	(envelope-from thompsa@freebsd.org)
Received-SPF: none
Received: from heff.fud.org.nz (60-234-149-201.bitstream.orcon.net.nz
	[60.234.149.201])
	by dbmail-mx1.orcon.net.nz (8.13.2/8.13.2/Debian-1) with SMTP id
	k1M8i9ZT001728
	for <freebsd-net@freebsd.org>; Wed, 22 Feb 2006 21:44:10 +1300
Received: by heff.fud.org.nz (Postfix, from userid 1001)
	id 0CBF01CC39; Wed, 22 Feb 2006 21:43:47 +1300 (NZDT)
Date: Wed, 22 Feb 2006 21:43:46 +1300
From: Andrew Thompson <thompsa@freebsd.org>
To: freebsd-net@freebsd.org
Message-ID: <20060222084346.GB29653@heff.fud.org.nz>
References: <20060222054441.GA29653@heff.fud.org.nz>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20060222054441.GA29653@heff.fud.org.nz>
User-Agent: Mutt/1.5.11
X-Virus-Scanned: ClamAV version 0.88,
	clamav-milter version 0.87 on dbmail-mx1.orcon.net.nz
X-Virus-Status: Clean
Subject: Re: ALTQ slowness
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.5
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: Wed, 22 Feb 2006 08:43:49 -0000

On Wed, Feb 22, 2006 at 06:44:41PM +1300, Andrew Thompson wrote:
> I am having a problem where it appears that the queue speed is 1/10th of
> the desired number. I have this simple setup on a bridge and can not get
> any more than about 1700 Bps with a http download (roughly 12Kbits).
> 
>  altq on sis0 cbq bandwidth 256Kb queue { std_in }
>  queue std_in    bandwidth 128Kb  cbq(default)
>  
>  pass  out on sis0 proto tcp from any to any queue std_in
 
To add further information, it now appears to be caused by the sis
driver. Here is iperf tests with a net4801+sis(4) and pentuim3+xl(4)
using the above pf config.

xl driver
 [  4]  0.0-13.2 sec    200 KBytes    124 Kbits/sec
 [  4]  0.0-23.1 sec    352 KBytes    125 Kbits/sec
 [  6]  0.0-32.7 sec    496 KBytes    124 Kbits/sec

sis driver
 [  4]  0.0-49.8 sec    296 KBytes  48.7 Kbits/sec
 [  6]  0.0-49.7 sec    296 KBytes  48.8 Kbits/sec
 [  4]  0.0-49.6 sec    296 KBytes  48.9 Kbits/sec


Andrew