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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] late-arriving hardware timestamps
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Wed, 24 Nov 2021 10:12:43 +0100
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On Tue, Nov 23, 2021 at 12:02:19PM -0500, Aaron Ball wrote:
> > Can you please post your chrony.conf?
>
> Both attached. (The only difference is the pidfile path.)
There is "acquisitionport 123" in the config files. I think that
prevents the implemented workaround from working. It can monitor only
client-specific sockets.
Try commenting that out and see if it helps.
> In general, does delaying processing to get more HW timestamps seem
> likely to be a good tradeoff for overall timekeeping quality? I.e., is
> there a clear empirical consensus on whether updating ~100 μs later or
> missing ~10% of hardware timestamps would have a bigger impact?
It's better to wait. Delaying the clock update has only a very minimal
impact, especially in the interleaved mode when the update is already
late by one poll interval.
--
Miroslav Lichvar
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