From owner-freebsd-net@FreeBSD.ORG Mon Apr 2 22:03:53 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 00BEA16A401 for ; Mon, 2 Apr 2007 22:03:53 +0000 (UTC) (envelope-from rob@hudson-trading.com) Received: from ms-smtp-01.rdc-nyc.rr.com (ms-smtp-01.rdc-nyc.rr.com [24.29.109.5]) by mx1.freebsd.org (Postfix) with ESMTP id B9F6C13C44C for ; Mon, 2 Apr 2007 22:03:52 +0000 (UTC) (envelope-from rob@hudson-trading.com) Received: from cpe-24-90-130-108.nyc.res.rr.com (cpe-24-90-130-108.nyc.res.rr.com [24.90.130.108]) by ms-smtp-01.rdc-nyc.rr.com (8.13.6/8.13.6) with ESMTP id l32M3pVS013220; Mon, 2 Apr 2007 18:03:51 -0400 (EDT) Date: Mon, 2 Apr 2007 18:03:38 -0400 (EDT) From: Rob Watt X-X-Sender: rob@cpe-24-90-130-108.nyc.res.rr.com To: freebsd-net@freebsd.org In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: Symantec AntiVirus Scan Engine Cc: rob work 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 22:03:53 -0000 Nevermind. After some more research it seems that we were having problems with the risers cards on some of our servers. I will do some more testing after the riser cards are replaced to see if we still have multicast drops when using 6.2. Most likely it was purely a hardware problem. Since it was the same exact behavior that we saw with the earlier version of the em driver I figured it was the same bug resurfacing again. - Rob Watt On Mon, 2 Apr 2007, 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 >