This defines when the kernel initiates a shutdown.
- Are you able to understand that an SBC with a SoC that reaches already 70°C when being TOTALLY IDLE is a design flaw (do a web search for ODROID-C2 to get the idea what's missing on crappy M3: mounting holes and a LARGE heatsink)
- Are you able to understand that the THS settings you chose are crap since the first THS trip point is just 5°C below the shutdown treshold?
- Are you able to understand that you got the wrong device since BPi M3 can not do real workloads on all 8 CPU cores while running at high clockspeeds?
You now have an octa-core board that insanely overheats while doing nothing. If you put some slight load on it it will shutdown with your settings. If you increase ths_trip2_0 it will crash/freeze instead. Why did you look for an octa-core design when you don't need CPU power? Or do you want to use the device all the time being absolutely idle?