[time-nuts] TSIP, SCIP time sync

Hal Murray hmurray at megapathdsl.net
Fri Mar 19 19:48:23 UTC 2010


holrum at hotmail.com said:
> Also you can cause an automatic time sync whenever the system clock and
> Tbolt clock difference exceeds x milliseconds.  Windoze reports the time to
> a millisecond,  but only increments the clock at typically 50-60 Hz.   That
> limits your absolute time sync accuracy. 

There is a lot of discussion about Windows on the ntp newsgroup.
(comp.protocols.time.ntp gets gatewayed to questions at lists.ntp.org)
I don't follow any of it closely, but some of it rubs off.

If you turn on the multi-media timer, the clock gets updated every ms.  (or 
something like that)

You can get much better time on a windows box, but you have to work for it.  
The basic idea is to build your own clock using the performance counter or 
TSC to interpolate between ticks.  There is code in ntpd that does it.



-- 
These are my opinions, not necessarily my employer's.  I hate spam.






More information about the time-nuts mailing list