From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760516AbXHATGf (ORCPT ); Wed, 1 Aug 2007 15:06:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764664AbXHATGT (ORCPT ); Wed, 1 Aug 2007 15:06:19 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:34534 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1764378AbXHATGS (ORCPT ); Wed, 1 Aug 2007 15:06:18 -0400 Date: Wed, 1 Aug 2007 21:05:56 +0200 From: Ingo Molnar To: Roman Zippel Cc: Linus Torvalds , Andi Kleen , Mike Galbraith , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: CFS review Message-ID: <20070801190556.GA1199@elte.hu> References: <1184389456.6632.13.camel@Homer.simpson.net> <20070801071230.GA16375@elte.hu> <20070801150742.GA23670@elte.hu> <20070801175004.GA17936@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.14 (2007-02-12) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7-deb -1.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * Roman Zippel wrote: > Hi, > > On Wed, 1 Aug 2007, Ingo Molnar wrote: > > > Andi's theory cannot be true either, Roman's debug info also shows this > > /proc//sched data: > > > > clock-delta : 95 > > > > that means that sched_clock() is in high-res mode, the TSC is alive and > > kicking and a sched_clock() call took 95 nanoseconds. > > > > Roman, could you please help us with this mystery? > > Actually, Andi is right. What I sent you was generated directly after > boot, as I had to reboot for the right kernel, so a little later > appeared this: > > Aug 1 14:54:30 spit kernel: eth0: link up, 100Mbps, full-duplex, lpa 0x45E1 > Aug 1 15:09:56 spit kernel: Clocksource tsc unstable (delta = 656747233 ns) > Aug 1 15:09:56 spit kernel: Time: pit clocksource has been installed. just to make sure, how does 'top' output of the l + "lt 3" testcase look like now on your laptop? Yesterday it was this: 4544 roman 20 0 1796 520 432 S 32.1 0.4 0:21.08 lt 4545 roman 20 0 1796 344 256 R 32.1 0.3 0:21.07 lt 4546 roman 20 0 1796 344 256 R 31.7 0.3 0:21.07 lt 4547 roman 20 0 1532 272 216 R 3.3 0.2 0:01.94 l and i'm still wondering how that output was possible. Ingo