From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754072AbZKTFib (ORCPT ); Fri, 20 Nov 2009 00:38:31 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753690AbZKTFia (ORCPT ); Fri, 20 Nov 2009 00:38:30 -0500 Received: from mga06.intel.com ([134.134.136.21]:10705 "EHLO orsmga101.jf.intel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753585AbZKTFi3 (ORCPT ); Fri, 20 Nov 2009 00:38:29 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.44,775,1249282800"; d="scan'208";a="468979357" Subject: Re: [Bug #14383] hackbench regression with kernel 2.6.32-rc1 From: "Zhang, Yanmin" To: Peter Zijlstra Cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Mike Galbraith , Ingo Molnar In-Reply-To: <1258542581.3918.255.camel@laptop> References: <1258542581.3918.255.camel@laptop> Content-Type: text/plain; charset="ISO-8859-1" Date: Fri, 20 Nov 2009 13:40:57 +0800 Message-Id: <1258695658.29789.27.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.28.0 (2.28.0-2.fc12) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2009-11-18 at 12:09 +0100, Peter Zijlstra wrote: > On Mon, 2009-11-16 at 23:37 +0100, Rafael J. Wysocki wrote: Sorry for replying late. There was a severe power failure in my Lab. Below are updates against 2.6.32-rc7 kernel. > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=14383 > > Subject : hackbench regression with kernel 2.6.32-rc1 > > Submitter : Zhang, Yanmin > > Date : 2009-10-09 9:19 (39 days old) > > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=29cd8bae396583a2ee9a3340db8c5102acf9f6fd > > References : http://marc.info/?l=linux-kernel&m=125508007510274&w=4 > > Handled-By : Peter Zijlstra On core2 arch machines, hackbench regression disappears and there is much improvement instead of regression. On Nehalem machine, no big change, comparing with 2.6.31. On Itanium machines (2 sockets or 4 sockets), the regression become about 20%. Originally it's 70%. > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=14384 > > Subject : tbench regression with 2.6.32-rc1 > > Submitter : Zhang, Yanmin > > Date : 2009-10-09 9:51 (39 days old) > > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=59abf02644c45f1591e1374ee7bb45dc757fcb88 > > References : http://marc.info/?l=linux-kernel&m=125508216713138&w=4 > > Handled-By : Peter Zijlstra On core2 arch machines, tbench regression becomes about 4%. Originally, the regression is about 33%. On Nehalem, tbench regression is about 4%. Original is 7%. On Itanium, tbench regression is about 16%. Original is 26% > > > > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=14621 > > Subject : specjbb2005 and aim7 regression with 2.6.32-rc kernels > > Submitter : Zhang, Yanmin > > Date : 2009-11-06 7:38 (11 days old) > > References : http://marc.info/?l=linux-kernel&m=125749310413174&w=4 specjbb2005 and aim7 results almost have no variation. > > > Yanmin, could you please update me on the status of these regressions? > > Mike seems to have done a lot to address issues while I was out, and > while I (hopefully) did read all resulting email, I must admit to > loosing track of where we stand. Mike's patch 1b9508f6831e10 could improve netperf loopback testing. The latest upstream doesn't merge it yet.