From owner-freebsd-amd64@FreeBSD.ORG Thu Dec 30 18:12:29 2004 Return-Path: Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BCF8E16A4CE for ; Thu, 30 Dec 2004 18:12:29 +0000 (GMT) Received: from mail4.speakeasy.net (mail4.speakeasy.net [216.254.0.204]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6A7A743D2F for ; Thu, 30 Dec 2004 18:12:29 +0000 (GMT) (envelope-from jmg@hydrogen.funkthat.com) Received: (qmail 21362 invoked from network); 30 Dec 2004 18:12:28 -0000 Received: from gate.funkthat.com (HELO hydrogen.funkthat.com) ([69.17.45.168]) (envelope-sender ) by mail4.speakeasy.net (qmail-ldap-1.03) with SMTP for ; 30 Dec 2004 18:12:28 -0000 Received: from hydrogen.funkthat.com (ojuzmj@localhost.funkthat.com [127.0.0.1])iBUICSGH082562; Thu, 30 Dec 2004 10:12:28 -0800 (PST) (envelope-from jmg@hydrogen.funkthat.com) Received: (from jmg@localhost) by hydrogen.funkthat.com (8.12.10/8.12.10/Submit) id iBUICS1d082561; Thu, 30 Dec 2004 10:12:28 -0800 (PST) Date: Thu, 30 Dec 2004 10:12:28 -0800 From: John-Mark Gurney To: Nicolas Blais Message-ID: <20041230181227.GR19624@funkthat.com> Mail-Followup-To: Nicolas Blais , freebsd-amd64@freebsd.org References: <20041229212555.GD89526@gargantuan.com> <20041230140022.GC59271@gargantuan.com> <58083.207.219.213.163.1104418371.squirrel@207.219.213.163> <200412301146.49669.nb_root@videotron.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200412301146.49669.nb_root@videotron.ca> User-Agent: Mutt/1.4.1i X-Operating-System: FreeBSD 4.2-RELEASE i386 X-PGP-Fingerprint: B7 EC EF F8 AE ED A7 31 96 7A 22 B3 D8 56 36 F4 X-Files: The truth is out there X-URL: http://resnet.uoregon.edu/~gurney_j/ X-Resume: http://resnet.uoregon.edu/~gurney_j/resume.html cc: freebsd-amd64@freebsd.org Subject: Re: CPU speed not reported correctly X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: John-Mark Gurney List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 30 Dec 2004 18:12:29 -0000 Nicolas Blais wrote this message on Thu, Dec 30, 2004 at 11:46 -0500: > This is because AMD uses PowerNOW! technology which changes the voltage > (therefore the speed) of the cpu for the load it gets. just for clarification, changed the voltage does not imply a change of the speed, it just means that at slower clock rates, it can reduce the voltage for the chip since the transistors don't need to switch as quickly.. > On December 30, 2004 09:52, Mike Jakubik wrote: > > Michael W. Oliver said: > > > When booting cold, the same speed is reported -- 801.83-MHz. Yes, this > > > is a laptop (Sager 4750-V). > > > > > > entire output of `dmesg -a': > > > http://michael.gargantuan.com/yabbse/index.php?action=dlattach;topic=309. > > >0;id=17 > > > > > > other info about this laptop: > > > http://michael.gargantuan.com/yabbse/index.php/board,44.0.html > > > > This is normal for AMD laptops. I have an Emachine M5310, and the CPU > > speed varies on it. If i right click on my computer in Windows XP, the > > reported frequency is almost always different. Strangely enough in FreeBSD > > its always the max though, i belive this technology may require a proper > > driver for the frequency to be adjusted. I would check your BIOS settings. -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."