衝吧ubuntu

由於現在的CPU都有動態調整CPU頻率的能力，所以，一般都會在比較低的頻率上執行，在ubuntu 9.10上，預設是ondemand，所以平常都是以最低的頻率執行，有需要的時候才會逐漸調高頻率執行，有哪些參數可以下？請參考：

brook@ubuntu:~$ more /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors 
conservative ondemand userspace powersave performance 

您可以在您的/etc/init.d底下發現一個名為ondemand的檔案，將內文中的"ondemand"改為您想要執行的governor即可，我是效能愛好者，所以，我當然是"performance"嚕。如：

#! /bin/sh
### BEGIN INIT INFO
# Provides:          ondemand
# Required-Start:    $remote_fs $all
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:
# Short-Description: Set the CPU Frequency Scaling governor to "ondemand"
### END INIT INFO


PATH=/sbin:/usr/sbin:/bin:/usr/bin

. /lib/init/vars.sh
. /lib/lsb/init-functions

case "$1" in
    start)
        start-stop-daemon --start --background --exec /etc/init.d/ondemand -- background
        ;;
    background)
        sleep 60 # probably enough time for desktop login

        for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
        do
                [ -f $CPUFREQ ] || continue
                echo -n performance > $CPUFREQ
        done
        ;;
    restart|reload|force-reload)
        echo "Error: argument '$1' not supported" >&2
        exit 3
        ;;
    stop)
        ;;
    *)
        echo "Usage: $0 start|stop" >&2
        exit 3
        ;;
esac