From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753506AbXICOr3 (ORCPT ); Mon, 3 Sep 2007 10:47:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751077AbXICOrU (ORCPT ); Mon, 3 Sep 2007 10:47:20 -0400 Received: from mail.tmr.com ([64.65.253.246]:39715 "EHLO gaimboi.tmr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750809AbXICOrU (ORCPT ); Mon, 3 Sep 2007 10:47:20 -0400 Message-ID: <46DC1E9B.3030108@tmr.com> Date: Mon, 03 Sep 2007 10:47:55 -0400 From: Bill Davidsen User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.8) Gecko/20061105 SeaMonkey/1.0.6 MIME-Version: 1.0 To: bjdouma@xs4all.nl CC: linux-kernel@vger.kernel.org Subject: Re: bogomips discrepancy on Intel Core2 Quad CPU References: <46DBC092.8030209@xs4all.nl> In-Reply-To: <46DBC092.8030209@xs4all.nl> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Bauke Jan Douma wrote: > $> uname -a > Linux skyscraper 2.6.22.5 #7 SMP PREEMPT Sun Sep 2 12:12:25 CEST 2007 > i686 GNU/Linux > > $> cat /proc/cpuinfo | grep bogomips > bogomips : 4813.46 > bogomips : 4810.91 > bogomips : 4810.91 > bogomips : 10583.94 > > The latter seems way off base. > Prod me for more info. > I see this occasionally on a dual, speedstep (or similar) finds a way to throttle down the cores under light load. I suspect that if you load the system: for n in 1 2 3 4; do nice -19 bash -c 'while true; do a=$RANDOM; done' & done Then you should see your bogomips rise on all cores. > bjd [... copy of output snipped, see the O.P. ...] -- Bill Davidsen "We have more to fear from the bungling of the incompetent than from the machinations of the wicked." - from Slashdot