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From: "Ralf Habacker" <Ralf DOT Habacker AT freenet DOT de>
To: "Cygwin" <cygwin AT sources DOT redhat DOT com>
Cc: "Tim Prince" <tprince AT computer DOT org>
Subject: RE: Old Thread: Cygwin Performance
Date: Wed, 23 Jan 2002 08:26:17 +0100
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Hi Tim,
Sorry for late answer, I was busy with other things. Should the link below help with this ? We (the kde-cygwin
team) are using this for a special profiling lib for profiling the kde2 port.

http://www-106.ibm.com/developerworks/library/l-rt1/

Ralf Habacker
kde on cygwin http://kde-cygwin.sf.net


> -----Original Message-----
> From: Tim Prince [mailto:tprince AT computer DOT org]
> Sent: Wednesday, December 05, 2001 9:36 PM
> To: Ralf Habacker; Cygwin
> Subject: Re: Old Thread: Cygwin Performance
>
>
>
> > > -----Original Message-----
> > > From: Tim Prince [mailto:tprince AT computer DOT org]
> > > Sent: Sunday, December 02, 2001 10:58 PM
> > > To: Ralf Habacker
> > > Cc: Cygwin
> > > Subject: Re: Old Thread: Cygwin Performance
> > >
> > >
> The QueryPerformance() calls are still giving 1.00 second timing resolution
> on an AthlonMP box (should be better than 10 microseconds on most other
> boxes, with correct usage), but their use appears to be truer to the
> original lmbench than the cygwin gettimeofday() with its 1.00 second
> resolution.
>
> I believed there were deficiencies in the way lmbench uses
> QueryPerformance(), preserving only 31 bits of clock ticks from the time of
> initialization, but I didn't succeed in showing any better way.
>
>


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