Floating point exceptions with -pthread

Marc Olzheim marcolz at stack.nl
Tue May 3 07:00:38 PDT 2005


On Tue, May 03, 2005 at 09:54:23AM -0400, Daniel Eischen wrote:
> > Hi.
> >
> > I was wondering whether it was safe to use floating point calculations /
> > libm functions with 5.4-STABLE's pthread library on HT+SMP. I keep
> > getting floating point exceptions on places where they should not
> > happen... :-(
> 
> Yes, it should work fine.  If you can verify the problem exists
> (or doesn't) on -current, that might help.  It sounds like FPU
> context isn't getting saved/restored correctly in the kernel.

I don't have a -current machine with HyperThreading... :-/

But I mailed a test program in a different thread; perhaps somebody else
is willing to run it...

Marc
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