Re: [chrony-users] PPS correction not being applied

[Bill Unruh <unruh@xxxxxxxxxxxxxx>]

On Thu, 23 Feb 2017, Brian Gieryk wrote:

> Relevant chrony.conf snipet:
You do not know what is relevant do you?

> # offline sources
>
> refclock SHM 0 refid GPS precision 1e-1

What is putting this info into shm?

> refclock SHM 1 refid NMEA precision 1e-9
> refclock SOCK /tmp/chrony.ttyS0.sock refid NMEA

Two different sources with the same name. That could cause confusion. 
Where do these come from?


> refclock PPS /dev/pps0 poll 0 refid PPS lock NMEA
>
> Sources output:
>
> pi@raspberrypi:~ $ sudo chronyc sources
> 210 Number of sources = 5
> MS Name/IP address         Stratum Poll Reach LastRx Last
> sample
> ===============================================================================
> #* GPS                       0   4   377 15-+1007us   [-1476us]+/-100ms

GPS reports. So why not lock to it?

> #? NMEA                      0   4     0      -+0ns   [   +0ns]+/-  0ns
> #? NMEA                      0   4     0      -+0ns   [   +0ns]+/-  0ns

Neither of your nmea sources report so PPS has nothing to lock to.

> #? PPS                       0   0     0      -+0ns   [   +0ns]+/-  0ns
> ^? 2610:20:6f15:15::27       0   8     0      -+0ns   [   +0ns]+/-  0ns

What is this source?


> pi@raspberrypi:~ $
>
> I don't see anything unusual(?) in the log...

Do you see anything? Why not give us 10 or 20 lines from the refclock log?


> I am not an old hand at this......
>
> Thank you!
>
> Brian
>
>
>
> > >
>
> > On Feb 23, 2017, at 09:09, Bill Unruh <unruh@xxxxxxxxxxxxxx> wrote:
> >
> > You tell it to lock to NMEA. Do you actually have an NMEA refclock running?
> > Ie you might want to show us what your complete chrony.conf is.
> >
> > Also in your sources, what sources are listed? Ie, what is the complete output of chronyc sources command.
> >
> > In the logging of the refclock, are there any entries? Do they give you a
> > clue?
> >
> >
> >
> > William G. Unruh __| Canadian Institute for|____ Tel: +1(604)822-3273
> > Physics&Astronomy _|___ Advanced Research _|____ Fax: +1(604)822-5324
> > UBC, Vancouver,BC _|_ Program in Cosmology |____ unruh@xxxxxxxxxxxxxx
> > Canada V6T 1Z1 ____|____ and Gravity ______|_ www.theory.physics.ubc.ca/
> >
> > > On Thu, 23 Feb 2017, Brian Gieryk wrote:
> > >
> > > Good morning.
> > >
> > > Running chrony 3.1, raspberry Pi 3 model B with the latest Raspbian Jessie.
> > >
> > > Have GPS working to set the clock with no issue.
> > >
> > > Have good PPS on /dev/pps0
> > >
> > > From searching the archives I have :
> > > refclock PPS /dev/pps0 poll 0 refid PPS lock NMEA
> > >
> > > Appended to the end of /etc/chrony/chrony.conf
> > >
> > > Running chronyd produces no errors
> > >
> > > PPS shows in chronyc sources
> > >
> > > However the #? next to PPS never changes (48 hours so far) and there are no corrections.
> > >
> > > Any thoughts?
> > >
> > > Thank you all!
> > >
> > > Brian
> > >
> > > Sent from my iPhone
> > > --
> > > To unsubscribe email chrony-users-request@xxxxxxxxxxxxxxxxxxxx
> > > with "unsubscribe" in the subject.
> > > For help email chrony-users-request@xxxxxxxxxxxxxxxxxxxx
> > > with "help" in the subject.
> > > Trouble?  Email listmaster@xxxxxxxxxxxxxxxxxxxx.
> >
> > --
> > To unsubscribe email chrony-users-request@xxxxxxxxxxxxxxxxxxxx with "unsubscribe" in the subject.
> > For help email chrony-users-request@xxxxxxxxxxxxxxxxxxxx with "help" in the subject.
> > Trouble?  Email listmaster@xxxxxxxxxxxxxxxxxxxx.
>
> --
> To unsubscribe email chrony-users-request@xxxxxxxxxxxxxxxxxxxx
> with "unsubscribe" in the subject.
> For help email chrony-users-request@xxxxxxxxxxxxxxxxxxxx
> with "help" in the subject.
> Trouble?  Email listmaster@xxxxxxxxxxxxxxxxxxxx.

--
To unsubscribe email chrony-users-request@xxxxxxxxxxxxxxxxxxxx 
with "unsubscribe" in the subject.
For help email chrony-users-request@xxxxxxxxxxxxxxxxxxxx 
with "help" in the subject.
Trouble?  Email listmaster@xxxxxxxxxxxxxxxxxxxx.