[ntp:questions] Tracking the drift of a GPS clock relative to a HW clock

Richard B. Gilbert rgilbert88 at comcast.net
Wed Jan 21 17:44:57 UTC 2009


Unruh wrote:
> David Woolley <david at ex.djwhome.demon.co.uk.invalid> writes:
> 
>> ryad.bek at gmail.com wrote:
> 
>>> This algorithm is robust because it is based on
>>> special techniques (it uses common packets in the traces to provide
>>> synchronisation).
> 
>> In the end, any such algorithm is going to have to use techniques 
>> similar to ntpd or chrony's.  The one advantage is that it is 
>> retrospective, and therefore probably better matches chrony's linear 
>> regression approach.  (NTP uses a low memory, incremental algorithm.)
> 
> That is why ntp has a VSZ of 4460 vs 2189 for chrony and RSS of 940 vs 748
> for chrony:-)
>  

VSZ???

RSS???

It would be helpful if you would define your terms!




More information about the questions mailing list