Ubuntu系统更改CPU频率

在Ubuntu 12.04系统上更改CPU频率，涉及到的内核参数值为scaling_governor

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor performance$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors conservative ondemand userspace powersave performance $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 3101000 3100000 2900000 2700000 2500000 2300000 2100000 1900000 1700000 1600000 

sudo apt-get install cpufrequtils相关参数$ cpufreq-selector -h  -c, --cpu           CPU Number  -g, --governor      Governor  -f, --frequency     Frequency in KHz试着调整一下$ sudo cpufreq-selector -c 0 -g performance看看结果$ cat /proc/cpuinfo | grep MHzcpu MHz: 3101.000cpu MHz: 1600.000cpu MHz: 1600.000cpu MHz: 1600.000设置开机自动调整$ sudo vim /etc/rc.local     #加入如下四行sudo cpufreq-selector -c 0 -g performancesudo cpufreq-selector -c 1 -g performancesudo cpufreq-selector -c 2 -g performancesudo cpufreq-selector -c 3 -g performance

万恶的Ubuntu，竟然不支持sudo echo xx > file。