I see nothing in your pair of unnecessarily belligerent comments that actually contradicts what I said. There are host-side features that enable the clock discipline you are observing, even if you are apparently not aware of them.
This is a really helpful contribution - if only everyone could be as smart as you.
If mine are somehow too beligerent for you, which is hilarious given how arrogant and beligerent your initial comment and responses come off as (maybe you are not aware?), then perhaps you'd like to actually engage any of the other comments that point out how wrong you are in a meaningful way?
Or are those too beligerent as well?
Because you didn't respond to any of those, either.
I'm sorry, this is just moving the goalposts.
You said "It can't achieve better-than-NTP results without disabling PCI power saving features and deep CPU sleep states."
This is flat wrong, as pointed out.
Now you are pedantically arguing that some NIC's that do PTP hardware timestamping might also use a feature that some operating systems might respect.
That's a very far cry from "It can't achieve better-than-NTP results without disabling PCI power saving features and deep CPU sleep states".
In most cases, people would just say "hey i was wrong about that but there are cases that i think matter where it falls down".