瑞芯微RK3399处理器的GPU和CPU性能方法参考：

为了VS-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

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RK3399平台资料：

http://bbs.16rd.com/citiao-xinpian-RK3399.html

RK3399是瑞芯微推出的一款低功耗、高性能的应用处理器芯片，该芯片基于Big.Little架构,即具有独立的NEON协同处理器的双核Cortex-A72及四核Cortex-A53组合架构，主要应用于计算机、个人互联网移动设备、VR、广告机等智能终端设备。RK3399内置多个高性能硬件处理引擎，能够支持多种格式的视频解码，如：4K*2K@60fps 的H.264/H.265/VP9，也支持1080P@30fps的H.264/MVC/VP8 以及高质量的JPEG编解码和图像的前后处理器。