[ntp:questions] Re: Windows timekeeping - sudden degradation - why?
mayer at ntp.isc.org
Sat Dec 10 03:57:35 UTC 2005
David J Taylor wrote:
> Martin Burnicki wrote:
>>David J Taylor wrote:
>>>I would also be interested in determining which program is switching
>>>the MM timer speed, and thereby upsetting the otherwise excellent
>>>timekeeping on this system. I wonder if there's a relatively easy
>>>way to determine this?
>>Unfortunately there's no way to find that out, AFAIK. You can only
>>observe the effects indirectly.
> I certainly hope your patch is accepted - I am tired of seeing this paused
> video on my desktop!
> I was wondering if (for example) sysinternals had a program for trapping
> the system call to change the MM timer resolution, and to determine who
> made that call. I would imagine it's not impossible to do.
You can put in some hooking functions to catch this, but these aren't
simple things to do. I'm not sure that sysinternals has something like
you're suggesting. LiveKD may be the closest thing.
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