| Re: [chrony-users] Clarification of terminologies |
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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] Clarification of terminologies
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Mon, 15 Apr 2024 11:19:48 +0200
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On Tue, Apr 09, 2024 at 05:04:37PM +0530, Abhijith Sethuraj wrote:
> When looking at offsets, is it better to rely on RMS offset from `chronyc
> tracking` or the best source's estimated offset from `chronyc sources -v`
> (provided this is only for the last sample)? Also, how would these differ
> from running `adjtimex()` and taking a look at `timex`'s offset member?
The tracking offset shows the last offset of the NTP clock estimating true
time considering all combined sources. The "System time" offset is the
current offset of the system clock to the NTP clock. The sources
offset is the last measurement of the source relative to the NTP
clock. The timex offset is the kernel's PLL offset. chrony doesn't use
that, so it should always be zero.
--
Miroslav Lichvar
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