3 ms·
Is this throttling in the chip itself? Or is it something that e.g. Linux (the kernel) needs to be taught specifically for make/model? Or some combination of th
by cmurf 8y ago
Is this throttling in the chip itself? Or is it something that e.g. Linux (the kernel) needs to be taught specifically for make/model? Or some combination of the two? And is it possible that the in-chip limiter is more of an emergency limit, and hitting it regularly can result in long term consequences if the kernel doesn't do aggressive enough limiting?
I just see really different behavior with heat, fans, and kernel behavior between XNU vs Linux, and Windows vs Linux on the same hardware.
- lykr0n 8y agoIn the source video, it shows that the chip is downclocking to 2.2GHz under sustained load. There is nothing any software can do about that as that's hardware doing it. The OS can govern how the fans spin up, but all CPUs will throttle down when they hit a predetermined temperature.
- Namesareapain 8y agoI am not sure why you are referring to Linux (macos kernel is XNU), but the firmware of the chip is in charge of controlling the CPU clockspeed and the only reason it is hitting this limiter is because the CPU does not have correct cooling, nothing to do with the OS.