From owner-freebsd-stable@FreeBSD.ORG  Mon Jan 24 00:14:29 2005
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP
	id 61B1F16A4CE; Mon, 24 Jan 2005 00:14:29 +0000 (GMT)
Received: from mail16.syd.optusnet.com.au (mail16.syd.optusnet.com.au
	[211.29.132.197])	by mx1.FreeBSD.org (Postfix) with ESMTP
	id 9D7E643D2D; Mon, 24 Jan 2005 00:14:28 +0000 (GMT)
	(envelope-from PeterJeremy@optushome.com.au)
Received: from cirb503493.alcatel.com.au
	(c211-30-75-229.belrs2.nsw.optusnet.com.au [211.30.75.229])
	j0O0EQD3017170
	(version=TLSv1/SSLv3 cipher=EDH-RSA-DES-CBC3-SHA bits=168 verify=NO);
	Mon, 24 Jan 2005 11:14:27 +1100
Received: from cirb503493.alcatel.com.au (localhost.alcatel.com.au
	[127.0.0.1])j0O0EQ7l030440;	Mon, 24 Jan 2005 11:14:26 +1100 (EST)
	(envelope-from pjeremy@cirb503493.alcatel.com.au)
Received: (from pjeremy@localhost)j0O0EQV6030439;
	Mon, 24 Jan 2005 11:14:26 +1100 (EST)	(envelope-from pjeremy)
Date: Mon, 24 Jan 2005 11:14:26 +1100
From: Peter Jeremy <PeterJeremy@optushome.com.au>
To: Stefan =?iso-8859-1?Q?E=DFer?= <se@FreeBSD.org>,
	freebsd-stable@FreeBSD.org
Message-ID: <20050124001425.GD241@cirb503493.alcatel.com.au>
References: <20050123135753.14384@mail.net-virtual.com>
	<20050123232738.GA78226@StefanEsser.FreeBSD.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <20050123232738.GA78226@StefanEsser.FreeBSD.org>
User-Agent: Mutt/1.4.2i
Subject: Re: NIC card problems....
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Production branch of FreeBSD source code
	<freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 24 Jan 2005 00:14:29 -0000

On Mon, 2005-Jan-24 00:27:38 +0100, Stefan Eßer wrote:
>The TX threshold messages issued by the dc driver appear more as an
>indication that the PCI bus is under severe load, than as a hint that
>the dc driver is causing the reboots, IMHO.

Under Tru64, I've seen Tulip cards report backoff to 1024 byte FIFO and
then switching to store-and-forward.  That's about 100µsec latency and
nothing should be holding the PCI bus that long.  I am inclined to
believe that something is stuffed in the PCI interface logic in the NIC.

-- 
Peter Jeremy