How is the time fed between hardclocks ?

deco33000 at deco33000 at
Sat Jul 25 09:31:12 UTC 2015


I am learning the freebsd way to keep the time up to date.

We avoid to call hardware hardclock() every time we need a timestamp by applying some math. I get the idea.

But, how do we know how far we are from the last hardclock()?
Are the updates to the "fake" timestamps occuring at a constant rate?

This is the last -and most important- point I don't get.



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