设置cpu频率

#设置CPU0频率为:998400
echo userspace > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo 998400 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
详细：http://blog.youkuaiyun.com/zhenwenxian/article/details/6196943


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01.stop thermald
02.stop mpdecision
03.stop thermal-engine
04.
05.
06.# online A57
07.echo 1 > /sys/devices/system/cpu/cpu2/online
08.echo 1 > /sys/devices/system/cpu/cpu3/online
09.echo 1 > /sys/devices/system/cpu/cpu4/online
10.echo 1 > /sys/devices/system/cpu/cpu5/online
11.echo 1 > /sys/devices/system/cpu/cpu6/online
12.echo 1 > /sys/devices/system/cpu/cpu7/online
13.
14.
15.# set governor
16.echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
17.echo performance > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor
18.
19.
20.# set max freq
21.echo 1555200 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
22.echo 1958400 > /sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq
23.
24.
25.# set gpu
26.echo performance > /sys/class/kgsl/kgsl-3d0/devfreq/governor
27.echo 0 > /sys/class/kgsl/kgsl-3d0/min_pwrlevel
28.echo performance > /sys/class/devfreq/qcom,cpubw.32/governor
29.echo performance > /sys/class/devfreq/qcom,gpubw.71/governor
30.echo performance > /sys/class/devfreq/qcom,kgsl-busmon.70/governor