Periodic spike in offset for pps

[Doug Curtis]

On Tue, May 5, 2020 at 3:30 PM Gary E. Miller via users <users at ntpsec.org>
wrote:

> Yo Doug!
>
> On Tue, 5 May 2020 15:27:07 -0400
> Doug Curtis <doug.curtis at world-mail.org> wrote:
>
> > On Tue, May 5, 2020 at 2:34 PM Gary E. Miller via users
> > <users at ntpsec.org> wrote:
> >
> > > Yo Doug!
> > >
> > > On Tue, 5 May 2020 14:08:26 -0400
> > > Doug Curtis via users <users at ntpsec.org> wrote:
> > >
> > > > I can't think of anything else to look for or try.
> > >
> > > The next places to look:
> > >
> > >         crontab -l
> > >         ls -l /etc/cron.*
> >
> >
> > They are stock Raspbian buster installs so there weren't any cronjobs
> > that I enabled.  The fake-hwclock job is enabled in cron.hourly so
> > I'm disabling that.
>
> Are you sure?  Can you share your "crontab -l"?
>
> > I'm trying not to change
> > too much at a time so I can (hopefully) narrow it down.  I just have
> > to be patient.
>
> Softly softly catch monkey.
>
> RGDS
> GARY
>
>
Here is the crontab -l output:

root at rpi-gps3:~# crontab -l
no crontab for root
root at rpi-gps3:~# crontab -l -u ntp
no crontab for ntp
root at rpi-gps3:~# crontab -l -u doug
no crontab for doug

I may have stumbled on to the issue though.  When reviewing the running
processes, I noticed systemd-timesync was running.  I know the howto says
to disable it but I assumed (insert your favorite saying about "assume"
here) clockmaker did that for me.  A quick "systemctl disable
systemd-timesyncd.service --now" fixed that.  I've gone ahead and done that
on all three Pis so I will see what the results of that reveal.

Thanks,

Doug
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