[ntp:questions] NTP client on Windows platform provides less accurate results then on the UNIX or Linux. Why?

Mayzel, Ilya ilya.mayzel at gs.com
Thu Mar 23 17:16:47 UTC 2006


Hello,

I am new to this technology and having a question that may be already
discussed here.

I installed
http://www.meinberg.de/download/ntp/windows/archives/ntp-4.2.0a@1.1370-o
-win32-setup.exe client on ~40 Windows XP SP2 machines and I am getting
offset accuracy about 10-20 time worse then on the UNIX or Linux
machines.
Here's the results:

Client Type	Core Linux	Core Solaris	Apps (Linux)	Windows
(full sample)	Windows (suspicious clients removed)	
Number of Clients	24	28	15	43	36	
Average Offset (ms)	0.026	-0.019	0.018	3.870	0.422	
Median Offset (ms)	0.006	-0.002	0.008	0.449	0.238	
Standard Deviation (ms)	0.300	0.633	0.256	19.576	6.290	

Does anyone have an experience running NTP v4.2.0 client on Windows and
what time accuracy should I expect?
Are there any methods to tune up this client?
Are there known list of the Windows applications that may negatively
contribute to the time synchronization?

I would appreciate any information, suggestions, links or references
regarding this meter.


Thanks,
 
Ilya Mayzel
212 357-5031




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