From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753804Ab1LYSge (ORCPT ); Sun, 25 Dec 2011 13:36:34 -0500 Received: from smtprelay0007.b.hostedemail.com ([64.98.42.7]:38083 "EHLO smtprelay.b.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752824Ab1LYSgb (ORCPT ); Sun, 25 Dec 2011 13:36:31 -0500 X-Panda: scanned! X-Session-Marker: 742E617274656D406C79636F732E636F6D X-Filterd-Recvd-Size: 1459 Date: Sun, 25 Dec 2011 18:36:29 +0000 (GMT) From: "Artem S. Tashkinov" To: linux-kernel@vger.kernel.org Cc: davej@redhat.com, cpufreq@vger.kernel.org Message-ID: <388674780.142932.1324838189780.JavaMail.mail@webmail18> References: <1982761334.142905.1324837801755.JavaMail.mail@webmail18> Subject: cpufreq userspace governor doesn't work for Intel Core 2 Gen 2 CPUs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Mailer: Webmail X-Originating-IP: [46.147.5.122] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On my Intel Core i5 CPU with acpi-cpufreq module loaded I do this # echo 2000000 | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_setspeed then # cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq 2000000 2000000 2000000 2000000 so theoretically it should work. However i7z (http://code.google.com/p/i7z/) shows that CPU frequency is freely floating and turbo boost gets enabled as soon as I have any discernible load, in other words userspace CPU frequency driver doesn't work at all and it doesn't really enforce the specified CPU frequency. Best wishes, Artem