From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757448AbYEFLwq (ORCPT ); Tue, 6 May 2008 07:52:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753113AbYEFLwg (ORCPT ); Tue, 6 May 2008 07:52:36 -0400 Received: from E23SMTP03.au.ibm.com ([202.81.18.172]:41898 "EHLO e23smtp03.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751145AbYEFLwf (ORCPT ); Tue, 6 May 2008 07:52:35 -0400 Date: Tue, 6 May 2008 17:22:07 +0530 From: Dhaval Giani To: "Zhang, Yanmin" Cc: Peter Zijlstra , LKML , Srivatsa Vaddagiri , Ingo Molnar , Aneesh Kumar KV Subject: Re: volanoMark regression with kernel 2.6.26-rc1 Message-ID: <20080506115207.GA24862@linux.vnet.ibm.com> Reply-To: Dhaval Giani References: <1210039590.3453.18.camel@ymzhang> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1210039590.3453.18.camel@ymzhang> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 06, 2008 at 10:06:30AM +0800, Zhang, Yanmin wrote: > Comparing with 2.6.25, volanoMark has big regression with kernel 2.6.26-rc1. > It's about 50% on my 8-core stoakley, 16-core tigerton, and Itanium Montecito. > > With bisect, I located below patch. > > 18d95a2832c1392a2d63227a7a6d433cb9f2037e is first bad commit > commit 18d95a2832c1392a2d63227a7a6d433cb9f2037e > Author: Peter Zijlstra > Date: Sat Apr 19 19:45:00 2008 +0200 > > sched: fair-group: SMP-nice for group scheduling > > Implement SMP nice support for the full group hierarchy. > > If I reverse the patch with resolving some conflictions, volanoMark result could > be restored completely. > ok, that's bad. Let's get vatsa and Ingo also involved. -- regards, Dhaval