Re: [chrony-dev] Time for a release?

[Miroslav Lichvar <mlichvar@xxxxxxxxxx>]

On Thu, Oct 07, 2010 at 06:27:56PM +0200, Miroslav Lichvar wrote:
> The most promising idea I came up so far is to adjust the interval
> based on number of samples kept in sourcestats, so it remains close to
> a fixed number. This would be configurable, a higher value would mean
> chrony should try to keep the buffer more filled and thus have better
> accuracy. The default would be set so chrony uses less or same
> resources than ntpd with same minpoll and maxpoll, while keeping
> better accuracy.

This is now in git. A very primitive control system is used, but it
seems to work quite nicely.

Here are some results from simulations:

http://mlichvar.fedorapeople.org/clknetsim/test9_ntp_offset.png
http://mlichvar.fedorapeople.org/clknetsim/test9_ntp_poll.png
http://mlichvar.fedorapeople.org/clknetsim/test9_chrony_offset.png
http://mlichvar.fedorapeople.org/clknetsim/test9_chrony_poll.png
http://mlichvar.fedorapeople.org/clknetsim/test9_start.png

Please test and report if chrony is using shorter poll interval than
you think it should.

-- 
Miroslav Lichvar

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