From owner-freebsd-net@FreeBSD.ORG Mon Apr 2 15:31:12 2007 Return-Path: X-Original-To: freebsd-net@freebsd.org Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id CD0CE16A402 for ; Mon, 2 Apr 2007 15:31:12 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from mxout5.cac.washington.edu (mxout5.cac.washington.edu [140.142.32.135]) by mx1.freebsd.org (Postfix) with ESMTP id AC47613C487 for ; Mon, 2 Apr 2007 15:31:12 +0000 (UTC) (envelope-from youshi10@u.washington.edu) Received: from smtp.washington.edu (smtp.washington.edu [140.142.32.139]) by mxout5.cac.washington.edu (8.13.7+UW06.06/8.13.7+UW07.03) with ESMTP id l32FVC1X019064 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Mon, 2 Apr 2007 08:31:12 -0700 X-Auth-Received: from [192.168.10.45] (c-67-187-172-183.hsd1.ca.comcast.net [67.187.172.183]) (authenticated authid=youshi10) by smtp.washington.edu (8.13.7+UW06.06/8.13.7+UW07.03) with ESMTP id l32FVBV6028975 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Mon, 2 Apr 2007 08:31:11 -0700 Message-ID: <46112198.2030801@u.washington.edu> Date: Mon, 02 Apr 2007 08:30:32 -0700 From: Garrett Cooper User-Agent: Thunderbird 1.5.0.10 (Windows/20070221) MIME-Version: 1.0 To: freebsd-net@freebsd.org References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-PMX-Version: 5.3.0.289146, Antispam-Engine: 2.5.0.283055, Antispam-Data: 2007.4.2.81733 X-Uwash-Spam: Gauge=IIIIIII, Probability=7%, Report='__CT 0, __CTE 0, __CT_TEXT_PLAIN 0, __HAS_MSGID 0, __MIME_TEXT_ONLY 0, __MIME_VERSION 0, __SANE_MSGID 0, __USER_AGENT 0' Subject: Re: em driver packet loss in 6.2 amd64 (RELEASE and STABLE) X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Apr 2007 15:31:12 -0000 Rob Watt wrote: > Hi, > > In 6.1-RELEASE there were a number of em driver stability and > performance issues. We would regularly see packet loss at low to > moderate load. A number of patches were applied that completely fixed > the problem for us. > > We installed 6.2-RELEASE, but even though 6.2 is supposed to have a > stable em driver, we are noticing the same packet loss problem again. > We updated to STABLE, and we didn't see any packet drops in our first > day of testing, but today we are seeing packet drops again. > > Has anyone else experienced this? Are there known problems with the > STABLE em driver? > > Our hardware: > > tyan s5372 motherboard (bios v1.05) > 2 intel x5355 processors > adaptec aic7902 scsi daughter card > there are 4 em interfaces (2 on-board, 2 from an add-on card), but we > are currently only using em0 > > We have experienced the packet drop problem with a custom kernel and > with the RELEASE SMP kernel. > > - > Rob Watt I saw a little bit of this when using vmware and a newly installed 6.2 guest machine. The problem was related to the amount of time it took for ssh to a real 7-CURRENT box to adjust the window size (interestingly enough). It took 15 ~ 20 additional seconds for it to adjust and later connect. This all occurred post authentication phase -- and I'm pretty sure it was the last step before connecting. -Garrett