Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755694Ab3GDLAv (ORCPT ); Thu, 4 Jul 2013 07:00:51 -0400 Received: from www.linutronix.de ([62.245.132.108]:40434 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750799Ab3GDLAu (ORCPT ); Thu, 4 Jul 2013 07:00:50 -0400 Date: Thu, 4 Jul 2013 13:00:52 +0200 (CEST) From: Thomas Gleixner To: Alex Shi cc: hpa@linux.intel.com, tim.c.chen@linux.intel.com, linux-kernel@vger.kernel.org, andi.kleen@intel.com, a.p.zijlstra@chello.nl, mingo@elte.hu Subject: Re: [URGENT rfc patch 0/3] tsc clocksource bug fix In-Reply-To: <1372916056-24301-1-git-send-email-alex.shi@intel.com> Message-ID: References: <1372916056-24301-1-git-send-email-alex.shi@intel.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 698 Lines: 19 On Thu, 4 Jul 2013, Alex Shi wrote: > We find some benchmarks drop a lot on tip/sched/core on many Intel boxes, > like oltp, tbench, hackbench etc. and bisected the commit 5d33b883ae > cause this regression. Due to this commit, the clocksource was changed > to hpet from tsc even tsc will be set CLOCK_SOURCE_VALID_FOR_HRES later > in clocksource_watchdog. 5d33b883ae is not in tip/sched/core. So what are you testing and bisecting? Thanks, tglx -- 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/