From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jesse Brandeburg Subject: Re: PROBLEM: bug in e1000 module causes very high CPU load Date: Sat, 10 Dec 2005 14:16:32 -0800 Message-ID: <4807377b0512101416t2f3a04c5ua6859ab3d99e8d07@mail.gmail.com> References: <20051210114100.QFYF676.mxfep01.bredband.com@ph0x> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Cc: linux-kernel@vger.kernel.org, Kernel Netdev Mailing List Return-path: To: ph0x In-Reply-To: <20051210114100.QFYF676.mxfep01.bredband.com@ph0x> Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 12/10/05, ph0x wrote: > [1.] One line summary of the problem: bug in e1000 (ksoftirqd eats all CPU) > [2.] Full description of the problem/report: > > After a while of using the network (uptime is 15 days now..) it suddenly > goes below expected performance. Even tho the utilization of the network is > 2-3MiB/s the CPU load gets unrealisticly high (1.0 - 8.0 in l/a) and the > system is very unresponsive via ssh. When freshly rebooted, I'm able to get > 18-19MiB/s without noticing any lag on ssh. Files have been transferred by > FTP and samba, still the same result. Kernel is freshly compiled > (http://www.ph0x.org/kernel.config, generated today) and I noticed this > issue with 2.6.11.2 aswell. > > eth0 is a D-Link DFL-530TX (via_rhine) and has no problems using the full > 100Mbit/s, but the Intel PRO/1000S has problems using over 10Mbit/s. It's > not related to the computer I transfer to/from, because I've got a gigabit > laptop aswell which can output much traffic without getting this high load. please send the output of cat /proc/interrupts, I'm worried you have an issue due to interrupt sharing. If it does fail again and is still usable, please send the output of ethtool -d eth0, and ethtool -S eth0. Also, is there any chance you can try the 6.2.15 driver from http://prdownloads.sf.net/e1000 do you have a test to reproduce this? Thanks, Jesse