On Thu, Dec 03, 2020 at 08:23:31PM +0000, Frank Wayne wrote: > Field 4 of statistics.log is the "estimated standard deviation of the > measurements from the source (in seconds)", whereas field 6 is the "estimated > standard deviation of the offset estimate (in seconds)". Field 6 is > apparently the local clock jitter relative to the source, but what is “the > measurements from the source” in field 4? Is this an estimate of the source > jitter? If so, relative to what?
chronyd keeps a number of measured offsets for each source. The field 4 is the stability of the measurements. That includes the local clock, network and server clock. The field 6 is the estimated stability of the final offset calculated from those measurements and which updates the clock. The values come from linear regression: data points vs the intercept. Does that help? -- 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.
