SIGFPE in CVS HEAD
Fri Apr 1 12:06:00 GMT 2011
On Apr 1 06:37, Yaakov (Cygwin/X) wrote:
> On Wed, 2011-03-30 at 10:56 +0200, Corinna Vinschen wrote:
> > The only possible cause for this line throwing an exception is if
> > resolution is 0. That should be impossible, unless the
> > NtQueryTimerResolution function returns a resolution < 10000. Since the
> > function returns values in 100ns intervals, this would result in a
> > resolution < 1 ms. Since the resolution of the hires_ms class is in
> > milliseconds, it would be 0.
> > Here's what NtQueryTimerResolution returns on my systems:
> > XP 32 bit: coarsest: 156250, finest: 10000, actual: 156250
> > W7 32 bit: coarsest: 156001, finest: 5000, actual: 156000
> > XP 64 bit: coarsest: 156250, finest: 10000, actual: 156250
> > W7 64 bit: coarsest: 156001, finest: 5000, actual: 10000
> I'm running W7 x64, and this is what I saw as well. But wouldn't the
> "actual" number float, meaning that it could go as low as the "finest"
It appears so, but even after a couple of hours running a testcase
on W7 64, I was never seeing any value < 10000. In fact, there were
only two values at all, 10000 and 156000.
> > Anyway, I'll make sure that resolution is never < 1.
> With that change, CVS HEAD is WFM again.
Cool. Thanks for your feedback.
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
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