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.csdn.net/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