3.15 CPU频率

  命令如下所示：

  查看当前运行CPU频率

cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq

  查看软件上最后一次设置的CPU频率

cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq	

  查看支持的CPU频率

cat /sys/devices/system/cpu/cpufreq/policy0/scaling_available_frequencies 

  使能CPU性能模式，跑最高频

echo performance > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor	

  切换governor到userspace

echo userspace > /sys/devices/system/cpu/cpufreq/policy0/scaling_governor 

  设置CPU频率 需要先切换到userspace

echo 1992000 > /sys/devices/system/cpu/cpufreq/policy0/scaling_setspeed  

  再查看当前运行CPU频率

cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq