[Embedded Linux] RK3399 Android7.1 CPU is overheating

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[Embedded Linux] RK3399 Android7.1 CPU is overheating [Copy link]

 

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Hello, we are using the RK3399+RK818 architecture. We found that the CPU is very hot in normal standby mode. How can the software reduce the temperature?
We found that the CPU main frequency is always 1.8GHZ and the voltage is 1.17V after booting. This may be the root cause of the heat. Why is the CPU running so high? How can we troubleshoot and analyze it?

Version:


Manufacturer's reply:
Have you changed the relevant frequency adjustment strategy yourself? The default CPU frequency adjustment strategy is interactive, which will automatically adjust the CPU frequency according to the CPU load, running at a low frequency when the load is low and running at a high frequency when the load is high.
Please use busybox to view the following information:
busybox top Check the background processes to see if there are any processes that are constantly consuming CPU resources.
busybox cat /d/opp/opp_summary Frequency and voltage configuration
busybox cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor busybox cat /sys/devices/system
/cpu/cpu0/cpufreq/scaling_cur_freq
busybox cat /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor
busybox cat /sys/devices/system/cpu/cpu4/cpufreq/scaling_cur_freq


Engineer's reply:




Manufacturer's reply:
It is obvious that the rild process has a high CPU usage and heavy load, which causes the CPU to run at a high frequency. Remove 4G verification


The results are significantly improved after removing 4G

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Communication can help discover and solve problems. Thank you for your hard work. Thanks for sharing!