| Re: [chrony-users] NTPsec's NTPViz Grapher Log Adapter |
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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] NTPsec's NTPViz Grapher Log Adapter
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Thu, 17 Sep 2020 08:58:33 +0200
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On Wed, Sep 16, 2020 at 04:45:03PM -0400, Matt Corallo wrote:
> In case anyone else finds this useful, I spent the time to write out some
> python to convert chrony's stats logs to something that looks close enough
> to ntpd that ntpsec's ntpviz can graph it.
Interesting. If you turn it into a project, I can add a link to the
"Useful links" page. IIRC ntpviz was originally based on the
chrony-graph project, so this seems to make it full circle :).
> Its not perfect - "Local RMS Frequency Jitter" is just the error bound
> chrony reports (which seems to be something similar, but different?)
Different, but both are measures of the frequency stability.
> and
> statistics.log doesn't report an average/median RTT time, so that is filled
> with 0s (maybe that would be a useful thing to provide?), but it otherwise
> works.
Measured delays are reported in the measurements log. In the
statistics log there is a number of currently held samples, so with
some processing of the history you could find a median, minimum, or
whatever you like.
> Demo at https://noc.as397444.net/ntpgraphs/ script at
The ~30ms offset shift happening for one of the GPS refclocks every
~1.5 days looks odd. Any idea what is causing that?
--
Miroslav Lichvar
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