From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263159AbVF3Uu5 (ORCPT ); Thu, 30 Jun 2005 16:50:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263149AbVF3Uuu (ORCPT ); Thu, 30 Jun 2005 16:50:50 -0400 Received: from isilmar.linta.de ([213.239.214.66]:49319 "EHLO linta.de") by vger.kernel.org with ESMTP id S263159AbVF3UuX (ORCPT ); Thu, 30 Jun 2005 16:50:23 -0400 Date: Thu, 30 Jun 2005 22:50:17 +0200 From: Dominik Brodowski To: john stultz Cc: "Ananiev, Leonid I" , lkml Subject: Re: [patch 1/] timers: tsc using for cpu scheduling Message-ID: <20050630205017.GB5437@isilmar.linta.de> Mail-Followup-To: Dominik Brodowski , john stultz , "Ananiev, Leonid I" , lkml References: <6EDC9204B3704C4C8522539D5C1185E5019D060F@mssmsx403.ccr.corp.intel.com> <1120158468.24889.150.camel@cog.beaverton.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1120158468.24889.150.camel@cog.beaverton.ibm.com> User-Agent: Mutt/1.5.9i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 30, 2005 at 12:07:48PM -0700, john stultz wrote: > Well, not quite. First of all, I believe (Dominik would know better) > that not all CPUs that support frequency scaling actually modify their > TSC frequency. So in some cases the TSC is time and in others it is > work. Indeed. For example, P4s capable of Enhanced SpeedStep do not modify the TSC tick rate. Dominik