Re: [chrony-users] Not getting time from gpsd

[Bill Unruh <unruh@xxxxxxxxxxxxxx>]

shm should also work. Question is if they are reading the same shm location.




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 Sat, 6 Aug 2016, Steve Horton wrote:

> Not really Chris. I don't see a sock option in your configuration file. Gpsd should write time out to a device
> file some where and chrony can read the time from that device file via a Unix domain socket. Like I said..look
> into the sock option  and how it relates to gpsd.
>
>
> On Aug 6, 2016 10:10 AM, "Chris Greenman" <chris.m.greenman@xxxxxxxxx> wrote:
>
>       Same thing.  Already tried it.
>
>
>       On Aug 6, 2016 6:35 AM, "Steve Horton" <stevejhorton@xxxxxxxxx> wrote:
>
>             I'd look closer at the SOCK option under the refclock section.
>             https://chrony.tuxfamily.org/manual.html#refclock-directive
>
>             On Aug 6, 2016 12:00 AM, "Chris Greenman" <chris.m.greenman@xxxxxxxxx> wrote:
>             >
>             > Hello,
>             >     I'm having an issue with getting time from gpsd.
>             >
>             > My setup is:
>             > Raspberry Pi 3 running Jessie Lite
>             > USB U-Blox gps
>             >
>             > gpsd is receiving NMEA from the GPS, cgps also shows time and position properly. 
>             >
>             > My chrony.conf is:
>             >>
>             >> server 0.us.pool.ntp.org
>             >> server 1.us.pool.ntp.org
>             >> server 2.us.pool.ntp.org
>             >> server 3.us.pool.ntp.org
>             >> driftfile /var/lib/chrony/drift
>             >> allow
>             >> refclock SHM 0 refid GPS precision 1e-1 offset 0.9999 delay 0.2
>             >> makestep 1 -1
>             >>
>             > Chronyc sources shows this:
>             >>
>             >> $ chronyc sources
>             >> 210 Number of sources = 5
>             >> MS Name/IP address         Stratum Poll Reach LastRx Last sample
>             >> ===============================================================================
>             >> #? GPS                           0   4     0   10y     +0ns[   +0ns] +/-    0ns
>             >> ^+ time-c.nist.gov               1   9   375   110    -23ms[  -22ms] +/-   47ms
>             >> ^* pool-96-248-122-64.cmdnnj     1  10   377    56  +9749us[  +11ms] +/-   18ms
>             >> ^- 104.156.99.226                2   9   377   367    +15ms[  +17ms] +/-  107ms
>             >> ^- 4.53.160.75
>             >>
>             > This system is going to be used on a boat and might not have internet.  I can tell
>             that both programs are accessing the shared memory using ipcs -m:
>             >
>             >> ------ Shared Memory Segments --------
>             >> key        shmid      owner      perms      bytes      nattch     status      
>             >> 0x4e545030 0          root       600        80         2                       
>             >> 0x4e545031 32769      root       600        80         1
>             >>
>             > Any idea why chrony isn't getting time from the GPS?
>             >
>             > Thanks