From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754785Ab1GNWOs (ORCPT ); Thu, 14 Jul 2011 18:14:48 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51154 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754072Ab1GNWOr (ORCPT ); Thu, 14 Jul 2011 18:14:47 -0400 Message-ID: <4E1F6A51.3020807@redhat.com> Date: Thu, 14 Jul 2011 18:14:41 -0400 From: Prarit Bhargava User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.9) Gecko/20100505 Fedora/3.0.4-2.el6 Thunderbird/3.0.4 MIME-Version: 1.0 To: Kyle McMartin , Linux Kernel CC: Rik van Riel Subject: Re: 3.0.0-rc6 ~9X system time degradation on kernbench References: <4E175C45.1060700@redhat.com> <4E17A4BF.5050500@redhat.com> <20110709224803.GC9545@bombadil.infradead.org> In-Reply-To: <20110709224803.GC9545@bombadil.infradead.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/09/2011 06:48 PM, Kyle McMartin wrote: > On Fri, Jul 08, 2011 at 08:45:51PM -0400, Rik van Riel wrote: > >> On 07/08/2011 03:36 PM, Prarit Bhargava wrote: >> >>> Just some numbers out of kernbench. System Time& Context Switches >>> climb dramatically between 2.6.38 and 3.0.0-rc6. Currently bisecting to >>> find out why. .config is based on Fedora's x86_64 .config. >>> >> > Er, if you're using Fedora's config, did you 'make release' first? > grep DEBUG in the config and see why... ;-) > That did it :) Thu Jul 14 15:33:27 EDT 2011 3.0.0-rc7+ Average Optimal load -j 48 Run (std deviation): Elapsed Time 178.384 (0.618692) User Time 3970.09 (1.93208) System Time 587.498 (0.511488) Percent CPU 2554.2 (8.58487) Context Switches 1.08771e+06 (9697.64) Sleeps 871265 (13137.6) Thu Jul 14 16:06:39 EDT 2011 2.6.38.8-35.fc15.x86_64 Average Optimal load -j 48 Run (std deviation): Elapsed Time 184.6 (8.64522) User Time 3961.07 (5.05) System Time 637.382 (11.7187) Percent CPU 2494.4 (102.827) Context Switches 1.09046e+06 (3986.03) Sleeps 873607 (4756.41) Still a bit higher ... but not 9x ... thanks Kyle. P.