From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Doug Smythies" Subject: RE: cpufreq doesn't work quite on Dell GX520 with Pentium D at 2.80gHz Date: Thu, 17 Sep 2015 20:24:46 -0700 Message-ID: <001201d0f1c1$92476900$b6d63b00$@net> References: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Content-Language: en-ca DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=telus.net; s=neo; t=1442546691; bh=gQ+NZa0eCS+c5AS9EgoKfZcLlZEShZJTWDNlkxSAZFA=; h=From:To:Cc:References:In-Reply-To:Subject:Date:Message-ID: MIME-Version:Content-Type:Content-Transfer-Encoding; b=ju0+lLAFoU+5rFTvXZbYBS9bbgAnJ1jA5Uvvf6975Yrge9PhKG+ymydDStKGkmhVA D5olyj64F89UjiP3ELZPiU2EBOAFLghO9xXfaUrwx4Xs7HdEOiagVVdr0XNVz4/PDv Thl9RrG4u/0ddFqwdNEG9N4HGKRZPHQD6I+pBnfJswvoUGJA1SEZGEt5kmYySsSk3r IwlNGuTzI01SF/nfAdwtPmh85+KppIaysl4GVIQ7CP2zEr/YEQMb4apQBVd2gRDlFn gLyswRRU+QLRjnPQGT8bkherBtwVRzfZEnHI3AJ1ky+xOYiGm/MvgrXHrYUplohEm+ Q8ZmFTwrhMZeA== Sender: cpufreq-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: 'Deirdre Kylie' Cc: cpufreq@vger.kernel.org On 2015.09.17 12:24 Deirdre Kylie wrote: > Here is the results after "apt-get"-ing it and running cpufreq-info > ~~~~~~~~~~~~~~~~~~~~~~~~~~~ > ... > Preparing to unpack .../cpufrequtils_008-1_amd64.deb ... > Unpacking cpufrequtils (008-1) ... > Processing triggers for man-db (2.6.7.1-1ubuntu1) ... > Processing triggers for ureadahead (0.100.0-16) ... > ureadahead will be reprofiled on next reboot > Setting up libcpufreq0 (008-1) ... > Setting up cpufrequtils (008-1) ... > * Loading cpufreq kernel modules... [fail] > * CPUFreq Utilities: Setting ondemand CPUFreq governor... > * disabled, governor not available... > [ OK ] > Processing triggers for libc-bin (2.19-0ubuntu6.6) ... > Processing triggers for ureadahead (0.100.0-16) ... > root@deeDell:/home/dee# cpufreq-info > cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009 > Report errors and bugs to cpufreq@vger.kernel.org, please. > analyzing CPU 0: > no or unknown cpufreq driver is active on this CPU > maximum transition latency: 4294.55 ms. > analyzing CPU 1: > no or unknown cpufreq driver is active on this CPU > maximum transition latency: 4294.55 ms. It sounds as though you do not have any frequency scaling driver, which might be a due to a BIOS setting (I don't know), and so no you shouldn't try to use cpufrequtils. Here is a way to check (there may be better ways): First there is a scaling driver: doug@s15:~/temp$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver intel_pstate intel_pstate intel_pstate intel_pstate intel_pstate intel_pstate intel_pstate intel_pstate doug@s15:~/temp$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor powersave powersave powersave powersave powersave powersave powersave powersave Second there is not a scaling driver: doug@doug-64:~$ cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver cat: /sys/devices/system/cpu/cpu*/cpufreq/scaling_driver: No such file or directory In the latter case the CPU frequency is fixed and is always the same: doug@doug-64:~$ grep MHz /proc/cpuinfo cpu MHz : 3391.586 cpu MHz : 3391.586