Re: All network sources unusable

Bryan, many thanks for the explanation and the suggestion regarding 
SHM0. My only worry is that the sourcestats output is not offering much 
in terms of offset of the network sources:

$ chronyc sourcestats
Name/IP Address            NP  NR  Span  Frequency  Freq Skew  Offset  
Std Dev
==============================================================================
GPS 8   5   110   +444.701    259.006    +16ms  4453us
PPS 64  37  1011     -0.000      0.002     -1ns  1058ns
zeit.fu-berlin.de 0   0     0     +0.000   2000.000     +0ns  4000ms
ptbtime1.ptb.de 0   0     0     +0.000   2000.000     +0ns  4000ms
ptbtime2.ptb.de 0   0     0     +0.000   2000.000     +0ns  4000ms
ptbtime3.ptb.de 0   0     0     +0.000   2000.000     +0ns  4000ms
ns.tu-berlin.de 0   0     0     +0.000   2000.000     +0ns  4000ms

Cheers,
Torsten

Bryan Christianson schrieb am 03.06.23 um 23:18:
> Hi Torsten
>
>  From the chrony.conf(5) manpage:
> noselect Never select this source. This is useful for monitoring or with sources which are not very accurate, but are locked with a PPS refclock.
>
> Your 'noselect' hosts are not viable sources as they will never be selected. They will however show up in the 'chronyc sourcestats' list with their measured offsets.
>
> If you look at the gpsd link again, you will see they are displaying 'chronyc sourcestats', not 'sources' as you have posted.
>
> Also, I suggest you set the SHM 0 refclock to noselect - it will still be used by the pps refclock to give a timestamp to the pps readings but will not participate in setting the clock.
>
> I hope that helps.
>
> Regards, Bryan
>
>