Subject: Re: fftw_test failing on Core 2 Duo/GENERIC.MP
To: None <M.Drochner@fz-juelich.de>
From: Brad du Plessis <email@example.com>
Date: 11/30/2007 14:49:32
Matthias Drochner wrote:
> firstname.lastname@example.org said:
>> You'll note that what is a bit concerning is that no system running
>> with both cores enabled passed this test. Has anyone else by any
>> chance tried this on a Core 2 Duo system and seen similar results?
> This might be the Core2-duo TLB bug; I was hit by that too.
> Look for a BIOS update which contains a CPU microcode fix.
I've downloaded the latest BIOS update for the Intel DG33FB (which is
about 2 weeks old) and the problem persists. Unfortunately I checked
through the BIOS notes and there's no mention of any CPU microcode fix.
The exact fftw_test error is:
Testing correctness for N = 3456...FATAL ERROR: NaN in answer
fftw: test failed.