Timekeeping between two hardclocks

[deco33000 at yandex.com]

huumm..

Did I get it wrong ? we cannot guess where we are in time, we just cache the hardware clock and do some calculations on it up to the next hardware read.
That way, we don't need to ask the hardware all the time.

I was wrong, thinking that we could derivate the current timestamp (the exact one, at the request moment) without ever needing hardware. That would have been genius.

But we just cache it. Simple.

Is my understanding right now ?
-- 
Jog