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现在是默认的300多MHz，想要提升性能，该怎么做？该系统怎么查看当前系统时钟，和网上标准linux不太一样。
请参考下面的SDK developer guide
$ echo 275000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed
3.3.4.20. Power Managementhttps://software-dl.ti.com/processor-sdk-linux/esd/docs/06_03_00_106/linux/Foundational_Components/Kernel/Kernel_Drivers/Power_Management.html?highlight=cpufreq
