From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760862AbZE0HBD (ORCPT ); Wed, 27 May 2009 03:01:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759389AbZE0HAz (ORCPT ); Wed, 27 May 2009 03:00:55 -0400 Received: from casper.infradead.org ([85.118.1.10]:32894 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752274AbZE0HAy (ORCPT ); Wed, 27 May 2009 03:00:54 -0400 Subject: Re: [PATCH] x86: fix cpufreq tsc scaling From: Peter Zijlstra To: Thomas Gleixner Cc: Ingo Molnar , "H. Peter Anvin" , lkml , john stultz In-Reply-To: References: <1243378105.6600.28.camel@laptop> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Wed, 27 May 2009 09:00:53 +0200 Message-Id: <1243407653.23657.39.camel@twins> Mime-Version: 1.0 X-Mailer: Evolution 2.26.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2009-05-27 at 00:52 +0200, Thomas Gleixner wrote: > On Wed, 27 May 2009, Peter Zijlstra wrote: > > Subject: x86: fix cpufreq tsc scaling > > From: Peter Zijlstra > > Date: Wed May 27 00:32:23 CEST 2009 > > > > For freqency dependent TSCs we only scale the cycles, we do not account > > for the discrepancy in absolute value. Add a constant factor so that: > > > > c1 + f1*cyc == c2 + f2*cyc > > > > LKML-Reference: > > Signed-off-by: Peter Zijlstra > > Chucked-on-by: Thomas Gleixner > > Hey, you misspelled this. I said "Chuckled-on-by" There is no hiding from your true feelings on the subject ;-) But yeah, it appears I'm dyslectic after midnight..