[time-nuts] Re: "software TCXO" on commodity computers

[Greg Maxwell]

On Mon, Apr 4, 2022 at 9:02 PM Jeremy Elson <jelson at gmail.com> wrote:
> This just won the Best Paper award at NSDI 2022:
> https://www.usenix.org/system/files/nsdi22-paper-najafi_1.pdf
> It's a clever idea: they observe that most commodity computer motherboards
> have temperature sensors onboard, and found a correlation between clock
> frequency and the output of that temperature sensor. Using that model they
> were able to build a "pure software TCXO" that maintains frequency an order
> of magnitude better than the typical performance of a crystal without the
> corrections.

Odd that they don't seem to mention the tempcomp in chrony:

https://chrony.tuxfamily.org/doc/2.4/chrony.conf.html#tempcomp

https://blog.dan.drown.org/beaglebone-black-ntpgps-server-temperature-compensation/



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