| Re: [chrony-dev] tracking report when not connected to anything misleading |
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On Mon, Apr 27, 2015 at 08:56:22AM -0700, Bill Unruh wrote:
>
> I am noticing a strange behaviour. Using server pool.ntp.org iburst
> in /etc/chrony.conf
>
> I get if I run chronyc and then sourcestats
> 210 Number of sources = 1
> Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev
> ==============================================================================
> resntp-b-vip.lon.bitfolk. 1 0 0 +0.000 2000.000 +0ns 4000ms
>
> Clearly no connection.
An older chrony version worked fine in the same configuration?
It might help to see the chronyd -d -d debug output (when chronyd is
configured and compiled with the --enable-debug option).
> and if I do tracking
>
> chronyc> tracking
> Reference ID : 0.0.0.0 ()
> Stratum : 0
> Ref time (UTC) : Thu Jan 1 00:00:00 1970
> System time : 0.000000001 seconds slow of NTP time
> Last offset : -0.000580443 seconds
> RMS offset : 0.001692938 seconds
> Frequency : 0.817 ppm slow
> Residual freq : +0.000 ppm
> Skew : 0.000 ppm
> Root delay : 0.000000 seconds
> Root dispersion : 0.000000 seconds
> Update interval : 512.2 seconds
> Leap status : Not synchronised
Hm, the update interval is quite long. How long has chronyd been
running? Was there a system suspend or something stepping the clock?
That would cause chronyd to drop all measurements and start from
scratch. There should be a message in the syslog if that's what
happened.
> Clearly there is no connection to the source at all. But the tracking still
> seems to indicate that everything is fine, when clearly it is not. Ie it is
> telling me that the system time is exactly on, etc. although the
> Reference ID clearly says something is wrong. There should be more of an
> indication in tracking that nothing is being tracked.
The leap status says it's unsynchronised, but from the non-zero offset
values it looks like at some point it was.
--
Miroslav Lichvar
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