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6740 Discussions

MKL DFT versus FFTW3.1

Henneking__Stefan
Beginner
‎03-21-2006 01:48 PM
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It seems to me that the new version of FFTW (released this january) is faster (e.g. ~20% for 512 points complex 1d double_precision) than the MKL8.0 routines, at least on Itanium systems.
I just did some rough performance analysis with a code using either FFTW3.1 or MKL8.0. Does anybody have detailed data? The Intel page deals with the outdated FFTW3.0.1 only.

cheers
Stefan
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ttppo
Beginner
‎03-29-2006 02:52 PM
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512-point fft? FFTW seems slower than MKL8.0:
http://www.fftw.org/speed/Pentium4-3.60GHz-icc/
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ttppo
Beginner
‎03-29-2006 03:02 PM
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My God! MKL8.0.1 is even faster than AMD Core Math Library (ACML3.0) on Opteron.
Opteron is so slow! So poor the float-point preformence!
http://www.fftw.org/speed/opteron-2.2GHz-64bit/
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