Re: Debugging PPS messages in chrony

>
> Of course when you try to debug it you issue the command "chronyc sources"
> to see what inputs are
> received and if they are locked.  You can look under the "Reach" header
> for the 377 which means the
> inputs are seen and valid, and in the second column a * shows the source
> is locked.

I tried this, I actually have a "refclock SHM 2:perm=0666 delay 0.5 refid
GPS noselect" in the original config file which I commented to try and
focus on the PPS alone. Looking at chrony sources and tracking, both seemed
to indicate that no messages were received at all, with last message 0 and
reach 0. This I how I got to the point of wanting to investigate means for
determining whether PPS was arriving at all.

Nor is availing oneself of any of the other options that
> may be relevant to this case...
>
I wasn't sure who this is referring to, short of ppstest (the output I
include in the original email) and putting chrony in debug print mode
(which prints nothing) I am not aware of any other debugging tools for this
purpose. Would you be able to suggest some?

Best regards,
Morten

On Mon, Jul 8, 2024 at 7:24 PM Rob Foehl <[email protected]> wrote:

> On Mon, 2024-07-08 at 18:06 +0200, Rob Janssen wrote:
> > Furthermore, when you start things using systemd it is tricky because
> systemd provides no sequence of starting
> > daemons, and you have to start the program for SHM and the pps
> (ldattach) BEFORE starting chrony!
>
> man 5 systemd.unit
>
> It's not "tricky" at all.  Nor is setting up dependent restarts between
> services, e.g. having the SHM/PPS service(s) automatically restart
> before chrony.  Nor is availing oneself of any of the other options that
> may be relevant to this case...
>
> -Rob
>
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