Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760648AbXENG36 (ORCPT ); Mon, 14 May 2007 02:29:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758107AbXENG3v (ORCPT ); Mon, 14 May 2007 02:29:51 -0400 Received: from www.osadl.org ([213.239.205.134]:40256 "EHLO mail.tglx.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752342AbXENG3v (ORCPT ); Mon, 14 May 2007 02:29:51 -0400 Subject: Re: [PATCH] x86-64 highres/dyntick support From: Thomas Gleixner Reply-To: tglx@linutronix.de To: Alistair John Strachan Cc: LKML , Venkatesh Pallipadi , john stultz , Ingo Molnar , Chris Wright , Arjan van de Ven , Steven Rostedt , Andi Kleen , Andrew Morton In-Reply-To: <200705140217.11515.s0348365@sms.ed.ac.uk> References: <1178485128.31213.98.camel@localhost.localdomain> <200705140217.11515.s0348365@sms.ed.ac.uk> Content-Type: text/plain Date: Mon, 14 May 2007 08:33:04 +0200 Message-Id: <1179124384.22481.292.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.6.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1685 Lines: 47 Alistair, On Mon, 2007-05-14 at 02:17 +0100, Alistair John Strachan wrote: > I've noticed a few problems with this patch series, which I manually (without > difficulty) ported to 2.6.22-rc1. There are a couple of fixups pending. I'm going to push out a new queue today. > Only 195 timer interrupts? I only see this on an AMD Opteron, it doesn't occur > on an Intel Core 2 Duo. Mainline reports this counter regularly increasing > with or without the acpi_pm clocksource loaded. We stop the PIT when we switch to the local APICs. On your Intel box you might have deeper C-states which switch the system back to broadcast mode via PIT. > Secondly, /proc/cpuinfo seems to be broken: > > alistair@damocles:~$ cat /proc/cpuinfo | grep MHz > cpu MHz : 210779.550 > cpu MHz : 210779.550 > > Unless my CPU is just under 80 times faster than it used to be, these numbers > are incorrect. I expect 2700.50, or something similar. cpufreq isn't compiled > in. Hmm. It seems the new TSC calibration routine is hosed. > Finally, and possibly related, the dmesg timestamps seem to be totally broken. > Apparently my machine booted in less than 1 second, with the last messages > as: > > [ 0.607862] bridge: topology change detected, propagating > [ 0.607862] bridge: port 2(lan-sky) entering forwarding state > [ 0.830472] Linux agpgart interface v0.102 (c) Dave Jones Hey, you have a really fast box :) 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/