Ubuntu10.04でCool'n'Quietを有効化
P.S. 2014May11
多分Ubuntu14.04とかでは、cpufrequtilsとBIOSでCool'n'Quietだけで良いと思われる。
なぜならdebian/whezzyではlinuxカーネルにデフォルトに入ったのかpowernowdが無くても
ってか、そもそも無くなってた＞＜
以下を参考に設定してみる。
http://prototype-game.blogspot.com/2008/10/ubuntu-804-amd64.html
CPU frequency scaling - ArchWiki
http://www.gentoo.org/doc/ja/power-management-guide.xml#doc_chap2
動的にCPUクロックや電圧を変更するcpufreqの概要とcpufreqdデーモンについて - 試験運用中なLinux備忘録
OS設定
CPUドライバのインストールする。
$ sudo aptitude install cpufrequtils
$ sudo aptitude install powernowd
$ /etc/init.d/powernowd start
$ modprobe powernow-k8
正常に動作してるか確認*2する。
$ cpufreq-info cpufrequtils 006: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to cpufreq@vger.kernel.org, please. analyzing CPU 0: driver: powernow-k8 CPUs which run at the same hardware frequency: 0 CPUs which need to have their frequency coordinated by software: 0 maximum transition latency: 36.0 us. hardware limits: 800 MHz - 3.00 GHz available frequency steps: 3.00 GHz, 2.30 GHz, 1.80 GHz, 800 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 800 MHz and 3.00 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 800 MHz. cpufreq stats: 3.00 GHz:22.42%, 2.30 GHz:0.19%, 1.80 GHz:2.62%, 800 MHz:74.77% (97) analyzing CPU 1: driver: powernow-k8 CPUs which run at the same hardware frequency: 1 CPUs which need to have their frequency coordinated by software: 1 maximum transition latency: 36.0 us. hardware limits: 800 MHz - 3.00 GHz available frequency steps: 3.00 GHz, 2.30 GHz, 1.80 GHz, 800 MHz available cpufreq governors: conservative, ondemand, userspace, powersave, performance current policy: frequency should be within 800 MHz and 3.00 GHz. The governor "ondemand" may decide which speed to use within this range. current CPU frequency is 800 MHz. cpufreq stats: 3.00 GHz:20.07%, 2.30 GHz:0.15%, 1.80 GHz:2.02%, 800 MHz:77.76% (74)
大丈夫だ、問題ない
色々適当に設定してみたけど、これで大丈夫か？
