cpu的频率信息
shell@android:/ # ls /sys/devices/system/cpu/cpu0/cpufreq/
affected_cpus
cpuinfo_cur_freq #当前频率,单位KHZ
cpuinfo_max_freq #最大频率
cpuinfo_min_freq
cpuinfo_transition_latency
related_cpus
scaling_available_frequencies
scaling_available_governors
scaling_cur_freq
scaling_driver
scaling_governor
scaling_max_freq
scaling_min_freq
scaling_setspeed
stats
shell@android:/ #