Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264577AbUFXOaS (ORCPT ); Thu, 24 Jun 2004 10:30:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264579AbUFXOaS (ORCPT ); Thu, 24 Jun 2004 10:30:18 -0400 Received: from holomorphy.com ([207.189.100.168]:7050 "EHLO holomorphy.com") by vger.kernel.org with ESMTP id S264577AbUFXOaM (ORCPT ); Thu, 24 Jun 2004 10:30:12 -0400 Date: Thu, 24 Jun 2004 07:30:00 -0700 From: William Lee Irwin III To: Yusuf Goolamabbas Cc: Nick Piggin , linux-kernel@vger.kernel.org Subject: Re: finish_task_switch high in profiles in 2.6.7 Message-ID: <20040624143000.GU1552@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Yusuf Goolamabbas , Nick Piggin , linux-kernel@vger.kernel.org References: <20040624091548.GA8264@outblaze.com> <40DA9E89.9020801@yahoo.com.au> <20040624093440.GA8422@outblaze.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040624093440.GA8422@outblaze.com> User-Agent: Mutt/1.5.5.1+cvs20040105i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1757 Lines: 31 On Thu, Jun 24, 2004 at 05:34:40PM +0800, Yusuf Goolamabbas wrote: > Yes, It's an SMP (Dual P3-800). Workload is a busy mailserver (get lots > of SMTP traffic, validate users against a remote database, reject a > truckload of connections). CONFIG_4K_STACKS=y on the 2.6.7 box, e100 > driver with NAPI turned off. No threads > The 2.6.7 box shows this wrt context swithes > procs memory swap io system cpu > r b swpd free buff cache si so bi bo in cs us sy wa id > 19 0 0 66516 63020 78148 0 0 0 1252 6100 14653 31 69 0 0 > 22 0 0 65300 63016 78084 0 0 0 0 5989 16043 34 66 0 1 > 29 1 0 67620 63024 78212 0 0 0 992 6314 14747 31 69 0 0 > The 2.6.5 box shows this > procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu---- > r b swpd free buff cache si so bi bo in cs us sy id wa > 34 0 0 135928 38160 189028 0 0 0 2160 5923 22532 32 68 0 0 > 166 0 0 137752 38148 188836 0 0 0 2424 5973 21695 30 70 0 0 > 229 0 0 135060 38272 189732 0 0 0 2340 6416 23697 33 67 0 0 32 0 0 134100 38288 189852 0 0 0 3068 6342 24016 33 67 0 0 This doesn't look like very intense context switching in either case. 2.6.7 appears to be doing less context switching. I don't see a significant difference in system time, either. Could you please send me complete profiles? -- wli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/