From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Fink Subject: Re: Network performance degradation from 2.6.11.12 to 2.6.16.20 Date: Mon, 26 Jun 2006 00:20:13 -0400 Message-ID: <20060626002013.55514734.billfink@mindspring.com> References: <4492D5D3.4000303@atmos.washington.edu> <44948EF6.1060201@atmos.washington.edu> <200606191724.31305.ak@suse.de> <449F0570.2090001@atmos.washington.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Return-path: Received: from smtpauth04.mail.atl.earthlink.net ([209.86.89.64]:7810 "EHLO smtpauth04.mail.atl.earthlink.net") by vger.kernel.org with ESMTP id S932272AbWFZEUT (ORCPT ); Mon, 26 Jun 2006 00:20:19 -0400 To: Harry Edmon In-Reply-To: <449F0570.2090001@atmos.washington.edu> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Sun, 25 Jun 2006, Harry Edmon wrote: > I understand the saying "beggars can't be choosers", but I have heard nothing on > this issue since June 19th. Does anyone have any ideas on what is going on? Is > there more information I can collect that would help diagnose this problem? And > again, thanks for any and all help! Harry, I'd suggest checking all the ethtool configuration settings (ethtool -a, -c, -g, -k) and statistics (ethtool -S) for both the working and problematic kernels, and then comparing them to see if anything jumps out at you. Also compare ifconfig settings and dmesg output. Check /proc/interrupts to see if there is any difference with the interrupt routing. Check sysctl.conf and rc.local for any special system configuration or device settings that might differ between the systems. The one thing that has caused me a lot of network performance issues on e1000 is having TSO enabled, so if that is enabled (check with ethtool -k), then I'd try disabling it to see if that helps. -Hope this helps -Bill