Re: fftw: Usage of SSE in 64bit?
On Wednesday 23 March 2011 9:52:27 am Carsten Aulbert wrote:
> Hi
>
> we are just discussing FFTW in our institute and we hit this bug
> reported to Ubuntu which also holds true for Debian:
>
> https://bugs.launchpad.net/ubuntu/+source/fftw3/+bug/602586
>
> Is there a specific reason why SSE is enabled for 32bit and not
> enabled for 64bit as the difference in performance can easily be a
> factor of 2 (on 64bit).
>
> As this is very often used in science, I thought people might know
> why this was chosen.
>
> Cheers
>
> Carsten
I wonder if this might have anything to do with the bug I just submitted
for fftw3-3
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=619324
That seems a 64bit problem not seen for 32bit.
regards cgm
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