From owner-freebsd-net@FreeBSD.ORG Mon Apr 2 15:26:30 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 F2AC916A402 for ; Mon, 2 Apr 2007 15:26:30 +0000 (UTC) (envelope-from rob@hudson-trading.com) Received: from ms-smtp-03.rdc-nyc.rr.com (ms-smtp-03.rdc-nyc.rr.com [24.29.109.7]) by mx1.freebsd.org (Postfix) with ESMTP id BA3BC13C459 for ; Mon, 2 Apr 2007 15:26:30 +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-03.rdc-nyc.rr.com (8.13.6/8.13.6) with ESMTP id l32Ebr54001122 for ; Mon, 2 Apr 2007 10:37:54 -0400 (EDT) Date: Mon, 2 Apr 2007 10:37:41 -0400 (EDT) From: Rob Watt X-X-Sender: rob@cpe-24-90-130-108.nyc.res.rr.com To: freebsd-net@freebsd.org Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: Symantec AntiVirus Scan Engine Subject: 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 15:26:31 -0000 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