Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759974AbYBML6D (ORCPT ); Wed, 13 Feb 2008 06:58:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755536AbYBML5w (ORCPT ); Wed, 13 Feb 2008 06:57:52 -0500 Received: from e1.ny.us.ibm.com ([32.97.182.141]:60957 "EHLO e1.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752612AbYBML5v (ORCPT ); Wed, 13 Feb 2008 06:57:51 -0500 Date: Wed, 13 Feb 2008 17:37:08 +0530 From: Srivatsa Vaddagiri To: Balbir Singh Cc: "Zhang, Yanmin" , LKML , Ingo Molnar , Peter Zijlstra Subject: Re: 2.6.25-rc1: volanoMark 45% regression Message-ID: <20080213120708.GA16231@linux.vnet.ibm.com> Reply-To: vatsa@linux.vnet.ibm.com References: <1202895028.3027.27.camel@ymzhang> <47B2BC2C.80100@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47B2BC2C.80100@linux.vnet.ibm.com> User-Agent: Mutt/1.5.11 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1573 Lines: 44 On Wed, Feb 13, 2008 at 03:15:16PM +0530, Balbir Singh wrote: > Zhang, Yanmin wrote: > > volanoMark has 45% regression with kernel 2.6.25-rc1 on my both 8-core > > stoakley and 16-core Tigerton. > > > > I used bisect to locate below patch. > > > > commit 58e2d4ca581167c2a079f4ee02be2f0bc52e8729 > > Author: Srivatsa Vaddagiri > > Date: Fri Jan 25 21:08:00 2008 +0100 > > > > sched: group scheduling, change how cpu load is calculated > > > > > > > > hackbench has about 30% regression on 16-core tigerton, but has about 10% improvement > > on 8-core stoakley. > > > > In addition, tbench has about 6% regression on my 8-core stoakley and > > 25% regression on 16-core stoakley. Some other benchmarks, like netperf/aim7 > > also have some regression. I will verify if they are all related to the > > patch. > > > > -yanmin > > Hi, Yamin, > > Thanks for reporting the issue? Any chance we could getthe Oprofile output for > the run? The exact commandline and .config being used would also help. Yamin, I would also like to know against which previous version is this regression being compared with. Is it 2.6.24? Did you have CONFIG_FAIR_USER_SCHED enabled in both cases? It would also help to know if you see the same regression with FAIR_GROUP_SCHED turned off. -- Regards, vatsa -- 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/