From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265912AbUBPVs5 (ORCPT ); Mon, 16 Feb 2004 16:48:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265911AbUBPVs5 (ORCPT ); Mon, 16 Feb 2004 16:48:57 -0500 Received: from mail.ondacorp.com.br ([200.195.196.14]:715 "EHLO mail.ondacorp.com.br") by vger.kernel.org with ESMTP id S265914AbUBPVs2 (ORCPT ); Mon, 16 Feb 2004 16:48:28 -0500 Message-ID: <40313AA9.1060906@arenanetwork.com.br> Date: Mon, 16 Feb 2004 21:48:25 +0000 From: dual_bereta_r0x Organization: ArenaNetwork Lan House & Cyber User-Agent: Mozilla Thunderbird 0.5 (X11/20040208) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Dominik Brodowski Cc: linux-kernel@vger.kernel.org, cpufreq@www.linux.org.uk Subject: Re: 2.6.2: P4 ClockMod speed References: <20040216213435.GA9680@dominikbrodowski.de> In-Reply-To: <20040216213435.GA9680@dominikbrodowski.de> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Dominik Brodowski wrote: > Hi, > > >>I have a P4 2.4 running @ 3.12GHz. > > > So you overclock your CPU but then throttle it down... strange, but well... Actually it isn't throttled down, only sysfs is showing it with low speed. It *is* running @ 3.12 (or /proc/cpuinfo and boot messages are lying to me) when in full power. >>In 2.6.0, i could change it frequency >>via speedfreqd(8) up to its actual speed. Since 2.6.1, its max speed is >>locked on cpu *real* speed. > > > It's just a change of appearance -- the cpufreq driver uses the theoretical > speed of the CPU for its calculations; the actual CPU speed isn't > affected. You can verify this by looking at /proc/cpuinfo which still tells > 3124.376 MHz. > > By doing so it becomes easier to enter different frequencies e.g. into > /sys/devices/system/cpu/cpufreq/scaling_setspeed -- on my desktop, typing in > 1200000 is easier than 12121224... [*] Sure but if i want to downgrade it, for example, by night, to a lower speed, and then next day return it to full power? Will I stuck at 2.4GHz? > Dominik > > [*] The _actual_ CPU speed should be used on all cpufreq drivers where this > specific CPU frequency has implications to external components, e.g. LCD, > memory or pcmcia devices. Where only the _frequency ratio_ is of importance > [for loops_per_jiffy and friends] such "rounding" is acceptable, as long as > the ratio is constant. Indeed. I'll showing in LCD a lower speed than the running. -- dual_bereta_r0x -- Alexandre Hautequest ArenaNetwork Lan House & Cyber -- www.arenanetwork.com.br Três anéis para os Reis Élficos sob este céu, Sete para os Senhores-Anões em seus rochosos corredores, Nove para Homens Mortais, fadados ao eternos sono, Um para o Senhor do Escuro em seu escuro trono Na Terra de Mordor onde as Sombras se deitam. Um Anel para a todos governar, Um Anel para encontrá-los, Um Anel para a todos trazer e na escuridão aprisioná-los Na Terra de Mordor onde as Sombras se deitam.