From owner-freebsd-hackers@FreeBSD.ORG Sat Jan 24 19:02:15 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 06EC716A4CE; Sat, 24 Jan 2004 19:02:15 -0800 (PST) Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1833E43D41; Sat, 24 Jan 2004 19:02:14 -0800 (PST) (envelope-from dillon@apollo.backplane.com) Received: from apollo.backplane.com (localhost [127.0.0.1]) i0P32B82039882; Sat, 24 Jan 2004 19:02:11 -0800 (PST) (envelope-from dillon@apollo.backplane.com) Received: (from dillon@localhost) by apollo.backplane.com (8.12.9p2/8.12.9/Submit) id i0P32BON039881; Sat, 24 Jan 2004 19:02:11 -0800 (PST) (envelope-from dillon) Date: Sat, 24 Jan 2004 19:02:11 -0800 (PST) From: Matthew Dillon Message-Id: <200401250302.i0P32BON039881@apollo.backplane.com> To: Max Laier References: <200401241739.51107.max@love2party.net> cc: hackers@freebsd.org cc: Robert Watson Subject: Re: XL driver checksum producing corrupted but checksum-correct packets X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 25 Jan 2004 03:02:15 -0000 Well, I tried to tcpdump a session. I managed to hit the error three times but in all three cases the tcpdump on the server dropped the particular packet I was looking for. I'm only able to get a 70% retention rate in the tcpdump output on the server... its just trying to record too much for the machine to handle at the rate the NFS requests are coming in. I'm going to give up trying to characterize the corruption for now. It could very well be the PCI latency timer as previously discussed but I can't test that right now. -Matt