From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 28 Feb 2001 04:53:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 28 Feb 2001 04:53:14 -0500 Received: from router-100M.swansea.linux.org.uk ([194.168.151.17]:60420 "EHLO the-village.bc.nu") by vger.kernel.org with ESMTP id ; Wed, 28 Feb 2001 04:53:05 -0500 Subject: Re: -ac6 mis-reports cpu clock To: bradley_kernel@yahoo.com (bradley mclain) Date: Wed, 28 Feb 2001 09:56:21 +0000 (GMT) Cc: linux-kernel@vger.kernel.org In-Reply-To: <20010228062156.33159.qmail@web9204.mail.yahoo.com> from "bradley mclain" at Feb 27, 2001 10:21:56 PM X-Mailer: ELM [version 2.5 PL1] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-Id: From: Alan Cox Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > here is an extract from dmesg from 2.4.2 and -ac6, > showing a disparity in cpu clock speed.. > > -ac6 has inserted a line claiming my clock is 400Mhz > (it is actually 533 -- and i believe my fsb is 133). > > i don't think i compiled these two radically > differently. what could i have done wrong to cause > this? or has -ac6 introduced a bug of some sort? ac6 reads the clock speed data from the CPU and also compares it with the running clock speed. So it thinks you have a chip intended for a 100Mhz bus. (multiplier 4 FSB 100). There are two possible causes for that result #1 You are running a 400/100 component at 533/133 #2 The bus clock tables for intel are subtly different to the ones we've managed to deduce so far (Its not properly documented) Alan