From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761439AbYEFCH2 (ORCPT ); Mon, 5 May 2008 22:07:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753146AbYEFCHP (ORCPT ); Mon, 5 May 2008 22:07:15 -0400 Received: from mga10.intel.com ([192.55.52.92]:8010 "EHLO fmsmga102.fm.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752309AbYEFCHO (ORCPT ); Mon, 5 May 2008 22:07:14 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.27,440,1204531200"; d="scan'208";a="324853254" Subject: volanoMark regression with kernel 2.6.26-rc1 From: "Zhang, Yanmin" To: Peter Zijlstra Cc: LKML Content-Type: text/plain; charset=UTF-8 Date: Tue, 06 May 2008 10:06:30 +0800 Message-Id: <1210039590.3453.18.camel@ymzhang> Mime-Version: 1.0 X-Mailer: Evolution 2.21.5 (2.21.5-2.fc9) Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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.  AIM7 (use tmpfs) also has more than 40% on my 8-core stoakley, 16-core tigerton, and Itanium Montecito, but I verified that aim7 regression isn't caused by above patch. I am doing new bisect to check aim7 now. -yanmin