| Re: [chrony-dev] [PATCH] MacOS X drift removal - please ignore |
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- To: chrony-dev@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-dev] [PATCH] MacOS X drift removal - please ignore
- From: Bryan Christianson <bryan@xxxxxxxxxxxxx>
- Date: Thu, 23 Jul 2015 18:14:47 +1200
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Double checking and I realise its all wrong - will post revised patch shortly
Sorry for the inconvenience.
Bryan
> On 23/07/2015, at 3:03 pm, Bryan Christianson <bryan@xxxxxxxxxxxxx> wrote:
>
> <0001-MacOS-X-add-drift-removal-based-on-sys_solaris.c.patch><0002-MacOS-X-drift-removal.patch>
>
> 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
>
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