From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751453AbWGLQSc (ORCPT ); Wed, 12 Jul 2006 12:18:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751457AbWGLQSc (ORCPT ); Wed, 12 Jul 2006 12:18:32 -0400 Received: from outbound-kan.frontbridge.com ([63.161.60.23]:945 "EHLO outbound2-kan-R.bigfish.com") by vger.kernel.org with ESMTP id S1751453AbWGLQSb convert rfc822-to-8bit (ORCPT ); Wed, 12 Jul 2006 12:18:31 -0400 X-BigFish: V X-Server-Uuid: 5FC0E2DF-CD44-48CD-883A-0ED95B391E89 X-MimeOLE: Produced By Microsoft Exchange V6.5 Content-class: urn:content-classes:message MIME-Version: 1.0 Subject: RE: [discuss] Re: [PATCH] Allow all Opteron processors to change pstate at same time Date: Wed, 12 Jul 2006 11:14:27 -0500 Message-ID: <84EA05E2CA77634C82730353CBE3A84303218EB7@SAUSEXMB1.amd.com> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [discuss] Re: [PATCH] Allow all Opteron processors to change pstate at same time Thread-Index: AcalvIl3WTDtGRvXQ8WZBSrvZbm9OwAD7mPQAABofiA= From: "Langsdorf, Mark" To: "shin, jacob" , "Deguara, Joachim" , "Andi Kleen" cc: discuss@x86-64.org, linux-kernel@vger.kernel.org, cpufreq@lists.linux.org.uk X-OriginalArrivalTime: 12 Jul 2006 16:14:28.0877 (UTC) FILETIME=[4063DBD0:01C6A5CE] X-WSS-ID: 68ABC06E27K16479796-01-01 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > Here are the further findings after letting the machine > toggle between > > 1GHz and 2.2Ghz every two seconds for roughly 24 hours. > Unfortunately > > there is an oops after bringing CPU2 online and CPU3 will not come > > online. Still the differences in TSC are not bad: > > Can I get more information on how to reproduce the Oops? > Kernel version? > .config? your hardware? > > I have run basic set of CPU Hotplug on/offline tests, and I could not > reproduce it.. There's probably something in my patch that is causing it. Are you testing with that? Joachim - Have you had a chance to measure TSC drift without PN? I'd like to know if the patch is making the problem worse or not. -Mark Langsdorf AMD, Inc.