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Jerome Genest

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Universite Laval

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23 Aug 2006 FFTmt Performs vectorized FFT on multiple processors using pthreads Author: Jerome Genest dsp, fft multiple processo... 2 6
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4.8 | 6 ratings
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16 Sep 2008 FFTmt Performs vectorized FFT on multiple processors using pthreads Author: Jerome Genest däumler, fritz

Great... but have problems with 64bit windows compile... someone has an working pthread-win32 compile for 64 bit windows?
05 Jan 2007 FFTmt Performs vectorized FFT on multiple processors using pthreads Author: Jerome Genest Iversen, John

Great! I've been using it on 4core intel Mac Pro for several months now, with up to ~3x speed gains. Gain increases with matrix size of course. Empirically, I've found for matrices with < 2^15 elements, the builtin matlab fft is faster.

I've also adapted a single-precision version, which has even larger speed gains. I will post this at some point, but email me now if you'd like it.
24 Oct 2006 FFTmt Performs vectorized FFT on multiple processors using pthreads Author: Jerome Genest fessler, jeff

I compiled it on a quad dual-core opteron box
with ncpu=8 and got only 1.8 to 2.5x speedup.
maybe the test routine doesn't have a big
enough example to illustrate the benefits of
so many cores. what i really want is to
speed up a single FFT.
05 Sep 2006 FFTmt Performs vectorized FFT on multiple processors using pthreads Author: Jerome Genest Wirleitner, Ulrich

Update for Win-XP-Version:

I could try it now on a AMD X2 DualCore CPU:
Speed up factor is about 1.6 up to 2.2. (using included test file).

Using 2D-FFT on 1MPix random images I could reach a factor of about 2.6, compiled version about 2.8 (!) compared to MATLAB R2006a internal fft. Could not try R2006b yet.

There is also a small numeric difference (or error?) between both FFT's which probably result from two different FFTW-Versions?

Hopefully FFTW's Multi-Core Support will be included in future MATLAB releases...

30 Aug 2006 FFTmt Performs vectorized FFT on multiple processors using pthreads Author: Jerome Genest abd, abady
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23 Aug 2006 FFTmt Performs vectorized FFT on multiple processors using pthreads Author: Jerome Genest dsp, fft multiple processo... 2 6
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