Android获取CPU频率和温度

查看CPU是几核

# cat /proc/cpuinfo | grep ^processor | wc -l
8

查看CPU有几个核在运行

# cat /sys/devices/system/cpu/online
0-1,4-7

查看系统支持多少个核:

# cat /sys/devices/system/cpu/present
0-7

开启某个CPU核

# echo 1 > /sys/devices/system/cpu/cpu#/online

注: #为数字，标识哪个CPU核，如八核CPU, 则＃取值为０～７

查看CPU核的运行频率

# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
960000

查看CPU核动态调频的Governor

# /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
interactive

查看当前CPU核的温度

# cat /sys/class/thermal/thermal_zone9/temp
42

注: SoC系统往往有多个thermal sensor, 需要分辨监测CPU核温度的是哪些sensor，

Qualcomm平台可参考/system/etc/thermal-engine.conf文件．