From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267514AbUH3Js1 (ORCPT ); Mon, 30 Aug 2004 05:48:27 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267629AbUH3Js1 (ORCPT ); Mon, 30 Aug 2004 05:48:27 -0400 Received: from gwout.thalesgroup.com ([195.101.39.227]:44554 "EHLO GWOUT.thalesgroup.com") by vger.kernel.org with ESMTP id S267514AbUH3JsR (ORCPT ); Mon, 30 Aug 2004 05:48:17 -0400 Message-ID: <4132F7DA.20406@fr.thalesgroup.com> Date: Mon, 30 Aug 2004 11:48:10 +0200 From: "P.O. Gaillard" Reply-To: pierre-olivier.gaillard@fr.thalesgroup.com Organization: Thales Air Defence User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.1) Gecko/20020827 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-kernel CC: Ingo Molnar Subject: Re: [patch] voluntary-preempt-2.6.8.1-P9 : a few submillisecond latencies References: <20040823221816.GA31671@yoda.timesys> <20040824061459.GA29630@elte.hu> <1093556379.5678.109.camel@krustophenia.net> <20040828121413.GB17908@elte.hu> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello, here are a few submillisecond latencies. First, the lspci of the machine (which is different from the one I just posted about). http://po.gaillard.free.fr/latency/dell.lspci-v.txt First, the 3c59x Ethernet card seems to cause 450us latencies : http://po.gaillard.free.fr/latency/latency_bt.3c59x.txt http://po.gaillard.free.fr/latency/latency_trace.3c59x.txt Then the e1000 driver seems to cause 200us latencies : http://po.gaillard.free.fr/latency/latency_bt.e1000_stats.txt http://po.gaillard.free.fr/latency/latency_trace.e1000_stats.txt Since the other machine with an Intel e1000 controller, shows a twice smaller latency, I post its lpsci entry for the controller (note that latency is twice smaller) : 02:0a.0 Ethernet controller: Intel Corp. 82541EI Gigabit Ethernet Controller (Copper) Subsystem: Intel Corp.: Unknown device 1213 Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 22 Memory at f2000000 (32-bit, non-prefetchable) I/O ports at b400 [size=64] Capabilities: [dc] Power Management version 2 Capabilities: [e4] PCI-X non-bridge device. and thank you to Ingo for the speedy response to the console issue. I applied the patch and the kernel is compiling. P.O. Gaillard