Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753355Ab0BTIJz (ORCPT ); Sat, 20 Feb 2010 03:09:55 -0500 Received: from mga01.intel.com ([192.55.52.88]:1308 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751885Ab0BTIJx (ORCPT ); Sat, 20 Feb 2010 03:09:53 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.49,507,1262592000"; d="scan'208";a="774379020" Subject: Re: [Bug #15192] netperf ~50% regression with 2.6.33-rc1, bisect to 1b9508f From: Lin Ming To: Mike Galbraith Cc: "Rafael J. Wysocki" , Linux Kernel Mailing List , Kernel Testers List , Ingo Molnar , Peter Zijlstra , venkatesh.pallipadi@intel.com In-Reply-To: <1265011447.6220.15.camel@marge.simson.net> References: <1265011447.6220.15.camel@marge.simson.net> Content-Type: text/plain Date: Sat, 20 Feb 2010 15:52:57 +0800 Message-Id: <1266652377.3464.6.camel@minggr.sh.intel.com> Mime-Version: 1.0 X-Mailer: Evolution 2.24.1 (2.24.1-2.fc10) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1156 Lines: 30 On Mon, 2010-02-01 at 16:04 +0800, Mike Galbraith wrote: > On Mon, 2010-02-01 at 01:22 +0100, Rafael J. Wysocki wrote: > > This message has been generated automatically as a part of a report > > of recent regressions. > > > > The following bug entry is on the current list of known regressions > > from 2.6.32. Please verify if it still should be listed and let me know > > (either way). > > Yes, it should remain open. We're currently waiting for some data from > Lin Ming. The regression itself isn't making much sense.. a kernel with > NEWIDLE disabled should show the same performance, but does not. (sorry for late response, I'm just back from vacation) We finally located this to a bug in mwait based C-state entry. Venki's patch has fixed it. http://patchwork.kernel.org/patch/78544/ Venki, this is the original report, http://marc.info/?l=linux-kernel&m=126441481427331&w=4 Thanks, Lin Ming -- 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/