接触到了Android系统的Performance测试,所以有锁定CPU的需求:
由于要首先读取到此系统所支持的CPU频率,之后再所支持的频率中选取你想要的频率,之后进行锁定。
这个过程,手动也是可以的,直接:
1.查看所支持的CPU频率:
adb shell cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
返回的结果是:416000 728000 900000 1040000
2.从上边的结果中选取一个416000 ,之后进行设定:
echo 416000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo 416000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
之后运行adb shell环境,输入
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq
查看设置是否有效,假如一直是416000,则证明设置生效。
由于每次都要输入以上代码查看之后设置,所以考虑用自动化实现,代码如下:
setFrequence.bat文件:
@adb shell setprop persist.service.thermal 0
@adb wait-for-device
@adb root
@adb wait-for-device
@adb remount
@for /f "tokens=*" %%i in ('adb shell cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies') do @set var=%%i
@echo All cpufreqs are: %var%
@set /p last=please input your freq:
::@echo My cpufreq is: %last%
@adb push .\run.sh /system/bin/
@adb shell chmod -R 777 /system/bin
@adb shell /system/bin/run.sh --Cpufreq=%last%
run.sh文件:
#!system//bin/sh
while [ $# -gt 0 ]; do
case $1 in
--Cpufreq=*)
cpufreq=${1#--Cpufreq=}
;;
esac
shift
done
#echo cpufreq=`echo $cpufreq`
echo $cpufreq > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo $cpufreq > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo $cpufreq > /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq
echo $cpufreq > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo scaling_min_freq=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq`
echo scaling_max_freq=`cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq`
echo scaling_cur_freq=
i=10
while [[ $i -gt 1 ]];
do
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq;
sleep 5;
((i--));
done
把上边两个文件放到一个folder下边,双击执行setFrequence.bat文件,输入你想要的频率即可。