[chrony-dev] [PATCH] MacOS X drift removal

[Bryan Christianson <bryan@xxxxxxxxxxxxx>]

Attachment: 0001-MacOS-X-add-drift-removal-based-on-sys_solaris.c.patch
Description: Binary data

Attachment: 0002-MacOS-X-drift-removal.patch
Description: Binary data

I have some before and after screen shots at http://whatroute.net/chrony/
Graphs based on values from tracking.log

Colour scheme in graphs:

Purple: Freq ppm
Red: RMS value of Offset (calculated as in chronyd) - usec
Brown: Rem. corr. usec
Orange: weighted mean of Rem corr (exponential, alpha = 0.1) - usec


http://whatroute.net/chrony/chrony-2.1.1.png - unpatched chrony-2.1.1

http://whatroute.net/chrony/chrony-git.png - included patches applied to git

Couple of things I noted

1. rem corr is no longer offset from 0 (well not by much) and has a much lower range

2. Frequency has changed from approx 20 ppm to about 60 ppm


Regards
Bryan