Re: [chrony-users] Root delay and Root dispersion values in `chronyc ntpdata'

[Horia Muntean <horia.muntean@xxxxxxxxx>]

On Tue, Aug 8, 2017 at 5:07 PM, Miroslav Lichvar <mlichvar@xxxxxxxxxx> wrote:
> Ok. I agree it could be useful.
>
> Do you think it would be better to write there the delay and
> dispersion as was estimated right before the update of the clock to
> get the maximum value of dispersion, or rather use the new values from
> the update, assuming the user will calculate the amount of dispersion
> that accumulated till the next update?
>
> --
> Miroslav Lichvar
>

How would one compute the estimated error of the system time from UTC
at any point in time from information given by 'chronyc tracking' ?
Is 'System Time' + 'Root Delay' / 2  + 'Root Dispersion' the correct formula ?
If yes then then all these 3 values would be helpful to be put in
tracking.log (or maybe other log) regardless
they are before or after an update as long as they are consistent
(they refer to the state of time from the same moment).

For consistency maybe they should be the values 'chronyc tracking'
would display after the last update.

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