From owner-freebsd-stable@FreeBSD.ORG Wed Dec 29 06:37:54 2004 Return-Path: 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 1DDCC16A4CE for ; Wed, 29 Dec 2004 06:37:54 +0000 (GMT) Received: from carver.gumbysoft.com (carver.gumbysoft.com [66.220.23.50]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0279B43D49 for ; Wed, 29 Dec 2004 06:37:54 +0000 (GMT) (envelope-from dwhite@gumbysoft.com) Received: by carver.gumbysoft.com (Postfix, from userid 1000) id EB2E172DD4; Tue, 28 Dec 2004 22:37:53 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by carver.gumbysoft.com (Postfix) with ESMTP id E5F3B72DCB; Tue, 28 Dec 2004 22:37:53 -0800 (PST) Date: Tue, 28 Dec 2004 22:37:53 -0800 (PST) From: Doug White To: Christian Weisgerber In-Reply-To: Message-ID: <20041228223525.T49504@carver.gumbysoft.com> References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: freebsd-stable@freebsd.org Subject: Re: 5.3-STABLE/alpha: re(4) slowdown X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 29 Dec 2004 06:37:54 -0000 On Thu, 23 Dec 2004, Christian Weisgerber wrote: > After updating my 5.3-STABLE/alpha from Dec 4 to Dec 22 on RELENG_5, > network _receiving_ throughput on its re(4) interface has collapsed > to a maximum of 0.5-1.0 MB/s. (Figures from scp. Yes, I realize > this is not the most suitable test, but the box is not CPU starved > and used to receive data at several times that rate.) I use the > machine as X11 display and quickly noticed that remote X11 apps had > become unusually slow. IPv4 and v6 are equally affected. > > There haven't been any changes to if_re.c in this period. Any other > changes that could explain this? Since it hasn't been asked .. have you checked the link speed and verified it isn't negotiating at 10Mbs/half instead of gig-e or whatever you're using? I found an rl card (yes I know rl, not re) that decided it really hated the bay switch it was attached to and would only negotiate 10mbit/half, even though the xl card in the same machine negotiated 100mbit/full. Silly stuff like that, and duplex mismatches, can cause problems like this that are seemingly random between reboots. -- Doug White | FreeBSD: The Power to Serve dwhite@gumbysoft.com | www.FreeBSD.org