安装cpufrequtils
apt install cpufrequtils
用于查看cpu频率，如果进设置cpu性能模式则无需安装
查看所有cpu 性能模式设置
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
1、设置所有cpu为performance模式
a=`lscpu | grep "On-line CPU(s)" | awk -F '-' '{print $3}'`
for (( i=0;i<=$a;i++ ))
do
echo performance > /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor
done
2、设置所有cpu为powersave模式
a=`lscpu | grep "On-line CPU(s)" | awk -F '-' '{print $3}'`
for (( i=0;i<=$a;i++ ))
do
echo powersave > /sys/devices/system/cpu/cpu${i}/cpufreq/scaling_governor
done
查看cpu信息
cpufreq-info
查看当前cpu频率
cpufreq-info | grep "current CPU frequency is"
以上适用于intel cpu设置性能模式，对于海光设置性能模式，可参阅
https://blog.csdn.net/qq_27815483/article/details/141425639
