1. power
/sys/power/wake_lock
echo temporary > /sys/power/wake_lock 防止系统挂起，增加唤醒锁
echo temporary > /sys/power/wake_unlock 移除唤醒锁
2. cpu
cat /sys/devices/system/cpu/present 查看核心数量
0-7
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies // 查看cpu核心支持的频率
614400 768000 936000 1105000 1228800 1404000 1560000 1703000 1846000 2002000 2184000
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors // 查看cpu核心支持的调频模式
userspace conservative powersave performance schedutil
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq //查看当前核心最大频率
1105000
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq //查看当前核心最小频率
1105000
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_curr_freq //查看当前核心实时频率
1105000
cat sys/devices/system/cpu/cpu0/online //查看当前核心是否在线
1 // 1表示打开，0表示关闭
cat /sys/class/thermal/thermal_zone0/temp // 查看cpu温度
32867 // 除以1000就是摄氏度
3. gpu
rk3568 cat /sys/devices/platform/fde60000.gpu/devfreq/fde60000.gpu/available_frequencies
800000000 700000000 600000000 400000000 300000000 200000000
cat /sys/devices/platform/fde60000.gpu/devfreq/fde60000.gpu/available_governors
dmc_ondemand venc_ondemand userspace powersave performance simple_ondemand
cat /sys/devices/platform/fde60000.gpu/gpuinfo
Mali-G52 1 cores r1p0 0x7402
查看gpu频率： cat /sys/devices/platform/fde60000.gpu/devfreq/fde60000.gpu/cur_freq
查看gpu 负载： cat /sys/devices/platform/fde60000.gpu/utilisation
查看gpu gover： cat /sys/devices/platform/fde60000.gpu/devfreq/fde60000.gpu/governor
设置gpu性能模式，最高频率： echo performance > /sys/devices/platform/fde60000.gpu/devfreq/fde60000.gpu/governor
