[time-nuts] Windows XP time

Magnus Danielson cfmd at bredband.net
Wed May 17 07:25:07 EDT 2006


From: John Ackermann N8UR <jra at febo.com>
Subject: Re: [time-nuts] Windows XP time
Date: Wed, 17 May 2006 07:02:35 -0400
Message-ID: <446B02CB.8000009 at febo.com>

> Joseph Gray wrote:
> > I just switched from using the built-in SNTP client for Windows XP to the
> > Windows binary of NTP that I got here:
> > http://www.meinberg.de/english/sw/ntp.htm
> > 
> > In both instances, I was using the us.pool.ntp.org servers. It seems that
> > the Windows XP implementation leaves something to be desired. The new NTP
> > client corrected my PC clock by over 1.5 seconds. Considering that I was
> > syncing to the same servers in both cases, this leads me to the conclusion
> > that Microsoft's implementation sucks.
> 
> As much as I hate to say it, it's not all Microsoft's fault :-).
> 
> The fundamental difference between SNTP and NPT is that SNTP does only a 
> period check and adjustment, so the clock can drift significantly 
> between polls.  NTP on the other hand attempts to continuously steer the 
> clock, and uses a much more sophisticated algorithm to determine the offset.

True, but they could have selected to implement NTPv3. However, to some degree
I am happy they didn't, but that is another story.

There is a cure for those that wants a better performance, that is the
important thing.
 
Cheers,
Magnus




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