Re: Strange "loss of PPS lock"
Miroslav Lichvar <[email protected]>
| Newsgroups | gmane.comp.time.chrony.user |
|---|---|
| Message-ID | <Y8kKWregbGqgkR8g@localhost> |
On Thu, Jan 19, 2023 at 10:06:00AM +0100, Rob Janssen wrote: > On 1/19/23 09:51, Miroslav Lichvar wrote: > > Are they stratum 1 servers? What root delay and dispersion is reported > > in chronyc ntpdata? > They are in the region of 15-30us. Indeed all those servers are > stratum 1, all running chrony and with a PPS via serial DCD. If those servers are in local network, the root distance might be smaller than the shifts in the PPS offset (e.g. due varying CPU load causing different delays in processing of the interrupt), which would cause the disagreement. Instead of the trust option I'd suggest to add "delay 2e-3" or some other suitable value to increase its interval and more reliably overlap with the NTP sources. -- Miroslav Lichvar -- To unsubscribe email chrony-users-request-kWFZVVI9zxvPqho9SqqRMmD2FQJk+8+b@public.gmane.org with "unsubscribe" in the subject. For help email chrony-users-request-kWFZVVI9zxvPqho9SqqRMmD2FQJk+8+b@public.gmane.org with "help" in the subject. Trouble? Email [email protected]