芯微RK3399处理器GPU和CPU 频率设置指南 - 技术支持 - 深圳市三维半岛科技有限公司官网

瑞芯微RK3399处理器GPU和CPU性能方法参考：

一，定频设置

为了 RK3399达到最好的性能，需要将CPU 及GPU 定频，特别是GPU。

CPU 定频方法参考：

cat /sys/devices/system/cpu/cpu4/cpufreq/scaling_available_frequencies

echo "userspace" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

echo "1416000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed

echo "userspace" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor

echo "1416000" > /sys/devices/system/cpu/cpu1/cpufreq/scaling_setspeed

echo "userspace" > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor

echo "1416000" > /sys/devices/system/cpu/cpu2/cpufreq/scaling_setspeed

echo "userspace" > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor

echo "1416000" > /sys/devices/system/cpu/cpu3/cpufreq/scaling_setspeed

echo "userspace" > /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor

echo "1800000" > /sys/devices/system/cpu/cpu4/cpufreq/scaling_setspeed

echo "userspace" > /sys/devices/system/cpu/cpu5/cpufreq/scaling_governor

echo "1800000" > /sys/devices/system/cpu/cpu5/cpufreq/scaling_setspeed

GPU 定频方法参考：

echo "userspace" >/sys/devices/platform/ff9a0000.gpu/devfreq/ff9a0000.gpu/governor

echo "800000000" >/sys/devices/platform/ff9a0000.gpu/devfreq/ff9a0000.gpu/userspace/set_freq

cat /sys/devices/platform/ff9a0000.gpu/devfreq/ff9a0000.gpu/cur_freq

二，最大频率设置

1）查看CPU支持的频率

cat /sys/devices/system/cpu /cpu0/cpufreq/scaling_available_frequencies

2）设置CPU0~3的最高频率1080Mhz

echo "1080000" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq

3）查看CPU4~5支持的频率

cat /sys/devices/system/cpu/cpu4/cpufreq/scaling_available_frequencies

4）设置CPU4~5的最高频率1416Mhz

echo "1416000" > /sys/devices/system/cpu/cpu4/cpufreq/scaling_max_freq

5）查看当前CPU的频率

cat /sys/devices/system/cpu/cpu0~4/cpufreq/cpuinfo_cur_freq