[ntp:questions] Re: Windows timekeeping - sudden degradation - why?
Richard B. Gilbert
rgilbert88 at comcast.net
Sun Dec 4 17:03:33 UTC 2005
David J Taylor wrote:
>Folks,
>
>I run a number of NTP systems based on Windows, and normally all but the
>Windows 2000 Workstation keep good time. In particular, the Windows XP
>SP2 system kept good time until about 14:00 UTC on Friday 2nd December.
>
> http://www.david-taylor.myby.co.uk/mrtg/odin_ntp.html
>
>I asked myself what changed on the system and, as far as I know, the
>answer is nothing! Around that time, I was developing a program for
>processing large images, and fed it an image which was too large. Perhaps
>coincidental - perhaps not. The pagefile size is fixed at 2GB and seems
>to still be the same. I wondered if disk I/O had become switched from
>UDMA to PIO, but its seems not. I've checked for spyware and neither
>SpyBot nor AdAware find anything other than cookies. I don't see anything
>unusual in Services. I even did a system restore to around 12:58 (IIRC)
>on the day in question, but this didn't cure the problem.
>
>I'm stuck! Can you help? Why would an otherwise good timekeeper become
>degraded in this way? The jitter figures (from ntpq -p) are in the 10 -
>15 millisecond range, even for servers on the LAN, whereas other PCs on
>the same LAN show jitter under a millisecond. Lan traffic looks normal,
>though. The delay figures look normal as well.
>
>Any ideas? (no, replacing XP is not an option!).
>
>Thanks,
>David
>
>
>
>
Do you have your systems configured to do "automatic updates". If so,
Microsoft may have installed a patch. . . .
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