From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750948AbVIUNya (ORCPT ); Wed, 21 Sep 2005 09:54:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750950AbVIUNya (ORCPT ); Wed, 21 Sep 2005 09:54:30 -0400 Received: from 167.imtp.Ilyichevsk.Odessa.UA ([195.66.192.167]:8677 "HELO port.imtp.ilyichevsk.odessa.ua") by vger.kernel.org with SMTP id S1750948AbVIUNy3 (ORCPT ); Wed, 21 Sep 2005 09:54:29 -0400 From: Denis Vlasenko To: Robert.Boermans@uk.telex.com Subject: Re: Bogomips on AMD X2 (was Re:) Date: Wed, 21 Sep 2005 16:53:17 +0300 User-Agent: KMail/1.8.2 Cc: linux-kernel@vger.kernel.org References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200509211653.17999.vda@ilport.com.ua> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > > I noticed that the bogomips results for the two cores on my machine are > > consistently not the same, the second one is always reported slightly > > faster, it's a small difference and I saw the same in a posted dmesg > from > > somebody else on the list. Which made me wonder: > > I guess it's a cache warming effect. Please show the numbers. > > Probably not, got this one from a web site, and on this one the first core > seems to be faster (can't check my own machine it's off and at home and > I'm at work.) The difference I get is similar, but always with the second > one faster. It's the same when using cat on /proc/cpuinfo. Oh and I saw it > on 2.6.11 and 2.6.12 as supplied with fedora core 4 myself. > > Calibrating delay using timer specific routine.. 4014.73 BogoMIPS > (lpj=8029470) ... > Initializing CPU#1 > Calibrating delay using timer specific routine.. 4005.37 BogoMIPS > (lpj=8010751) Why do you think it cannot be a cache warming effect? -- vda