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Date: Thu, 22 Mar 2012 10:49:56 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: clock_getres(CLOCK_REALTIME, .) may return an outdated and too high resolution
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On Mar 22 10:39, Peter Rosin wrote:
> Corinna Vinschen skrev 2012-03-22 10:33:
> > On Mar 21 23:59, Christian Franke wrote:
> >> BTW: GetSystemTimeAsFileTime() apparently provides the same
> >> resolution (at least on Win7 x64). So the more complex use of
> >> SharedUserData.InterruptTime may have less benefit than expected.
> > 
> > On pre-Vista, the accuracy of GetSystemTimeAsFileTime is 15.625 ms,
> > fixed.  On Vista and later it seems to be 15ms or better, but its
> > resultion is not constant anymore.
> 
> I have definite memories of an (albeit odd) XP laptop with 10 ms
> accuracy.  But that was years ago.  Hmmm?

Oh, right.  It depends on the hardware.  Some commenter on
http://msdn.microsoft.com/en-us/library/windows/desktop/ms724397%28v=vs.85%29.aspx
mentions that.


Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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