On Thu, Mar 26, 2020 at 2:00 AM Miroslav Lichvar <mlich...@redhat.com> wrote:
> On Wed, Mar 25, 2020 at 03:53:17PM -0600, Dave Hajoglou wrote: > > refclock SHM 0 refid GPS precision 1e-1 > > > > refclock PPS /dev/pps1 lock NEMA > > There are two issues with this config. One is that the PPS refclock is > locking to a non-existent refid Thanks for taking a look. Good catch on the refids. I have been bouncing between different config examples and I had a NEMA refid for the GPS SHM at one point then switched to GPS and didn't update the PPS. I also made sure that PPS was complied into chrony and I even removed the PPS support from GPS so that I'm only referencing the Kernel PPS device. That did not improve anything > and the SHM refclock is not marked as > noselect. Try this > > refclock SHM 0 refid NMEA precision 1e-1 noselect > refclock PPS /dev/pps1 lock NMEA refid GPS > > New config: refclock SHM 0 refid NEMA precision 1e-1 noselect refclock PPS /dev/pps0 lock NEMA refid GPS After running for about an hour I get no selection as expected. But, I also get no detection of the PPS either. =============================================================================== #? NEMA 0 4 377 16 +177ms[ +177ms] +/- 100ms #? GPS 0 4 0 - +0ns[ +0ns] +/- 0ns =>The PPS isn't processing or being seen by the logs but the device is active: trying PPS source "/dev/pps0" found PPS source "/dev/pps0" ok, found 1 source(s), now start fetching data... source 0 - assert 1585247167.944762955, sequence: 51077 - clear 0.000000000, sequence: 0 source 0 - assert 1585247168.944717687, sequence: 51078 - clear 0.000000000, sequence: 0 =>cgps shows a 3d fix. =>If I remove the noselect, it does pickup the NEMA source but never gets data from the pps source. Log entries never show up in refclock. =>If I remove the lock NEMA then the pps source is seen and processed and that's when I get the flapping where it selects first NEMA, the GPS refid then falls into the majority sync error. This is a weird one as it won't process the PPS if I lock it. Does that have to do with the fact that the PPS is from GPIO rather than serial? Is there any logging or diagnostic tool usage I can try? The refclock and stats logs are lost on me. -- > Miroslav Lichvar > > > -- > To unsubscribe email chrony-users-requ...@chrony.tuxfamily.org > with "unsubscribe" in the subject. > For help email chrony-users-requ...@chrony.tuxfamily.org > with "help" in the subject. > Trouble? Email listmas...@chrony.tuxfamily.org. > >
