Re: [Valgrind-users] run_innerloop error

[Julian S. <js...@ac...>]

Hmm.  2.6.16 isn't exactly what you'd call an ancient and buggy kernel.

But .. [thinks] isn't this a red herring?  If 3.2.0 does
not fail on your box when running your Fortran app but 3.2.1 does,
then it has to be a regression in 3.2.1.  That's what you're 
saying happened, right?

Hmm.

J


On Thursday 21 September 2006 00:24, Catherine Moroney wrote:
> Here's my kernel version number:
>
> cm...@si...:/data/L2TC/cmm/stereo_special_runs/larry
> [80]>uname -rv
> 2.6.16-1.2096_FC5 #1 SMP Wed Apr 19 05:14:26 EDT 2006
>
> Catherine
>
> On Sep 20, 2006, at 4:21 PM, Julian Seward wrote:
> >>> Are you doing something strange with floating point rounding, or
> >>> other IEEE control word stuff (precision, exception handling) ?
> >>
> >> We've been seeing it on amd64 machines - see my postings on the
> >> developer list a few months ago for details.
> >>
> >> What I see is the FPU control word changing precision from 64 bit
> >> to 80 bit if I recall correctly. I'm pretty sure it's a kernel
> >> bug though
> >
> > Ah, well remembered.  Now you point it out that does sound vaguely
> > familiar.
> >
> > Catherine, what kernel version are you using?  It would be interesting
> > to know if it's in the same ballpark as the ones Tom saw this
> > problem on.
> >
> > J