There was a paper on this in 2022. Not sure if it's used in production or not.

https://www.usenix.org/conference/nsdi22/presentation/najafi

Cool paper. Their modeling of the temperature response curve seems a more elegant (albeit non-trivial) solution than burning CPU.

the only contribution of that paper is they found & reported that there are potentially dozens of temperature sensors in a typical server.

the method of using two PPS signals configured to be some delta time apart to detect jitter is not new. the whole learning the tempco of the crystal thing is like 80 years old.

they also avoided touching the most critical part of the issue - how would you be sure that such learned tempco is accurate enough for the estimated bound.