环境:ubuntu15.10

查看内核支持的cpu策略

cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors

比如我的显示

performance powersave

说明我的目前只支持节能和高性能,要想支持更多请安装相应模块

一般策略如下

. performance:CPU维持最高时脉运行。
. ondemand:程序运行时,直接调高时脉运行。(但不一定是调到最高,而是依程式需求)。没有运行时,调低时脉。
. conservative:同上,但调整的方式,是一阶一阶地调整,而非直接调整。
. powersave:CPU维持最低时脉运行
5. userspace:是由使用者自己定义,需要安装其他软件管理

此时我们只需要将

/sys/devices/system/cpu/cpu0/cpufreq/scaling_governors

文件中的内容改成你所需要的即可,一般我们/sys/devices/system/cpu/下面有很多核心,比如我的cpu0-7八核心,所以每一个都需要该

echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu6/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu7/cpufreq/scaling_governor

每次都这样比较麻烦,所以我们可以将其写入脚本

#!/bin/bash
#set cpu scaling governor by your self

#函数查找有几个核心并将其scaling_governor文件设置成你所需要的内容
set_cpu()
{
for i in `ls /sys/devices/system/cpu/ | grep 'cpu[0-9]?*'`
do
echo $ > /sys/devices/system/cpu/$i/cpufreq/scaling_governor
done
}

#判断输入
case $1 in
#performance
"pf")
set_cpu performance
;;
#ondemand
"od")
;;
#conservative
"cs")
;;
#powersave
"ps")
set_cpu powersave
;;
*)
echo "please input [pf][od][cs][ps]"
;;
esac

我们保存成cpufreq.sh并加上可执行权限

chmod +x cpufreq.sh

然后执行

sudo ./cpufreq.sh pf

查看一下文件

aaarticlea/png;base64,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" 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