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Understanding HPET main counter value

Posted: Sat Feb 12, 2022 11:02 pm
by kurtmweber
I can't find anything that states this unambiguously in the documentation, unless I've missed it (which is entirely possible), but:

Does an increment of 1 in the HPET main counter value represent (at least in principle, because obviously the reality of clock implementations is constrained by physical uncertainty and tolerances and resolution, etc.) the passage of:

1 femtosecond

1 "General Capabilities and ID Register"->"COUNTER_CLK_PERIOD"

Something else

?

Re: Understanding HPET main counter value

Posted: Sun Feb 13, 2022 12:40 am
by nullplan
That is precisely what "period time" means. So option number two!