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MKL FFTW interface performance

meneses__esteban
Beginner
‎03-31-2014 08:45 AM
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   Hi,

   I am trying to reproduce the results of the MKL FFTW interface in this report:

https://software.intel.com/sites/default/files/article/165868/intel-mkl-fft-training-ppt-v11.pdf

   Does anybody know where I can get the source code used in that report?

   So far, I have been running the source code in this webpage:

http://numbercrunch.de/blog/2010/03/parallel-fft-performance/comment-page-1/

but the MKL FFTW interface shows really poor performance. I wonder if there is something I am missing.

   Thanks.

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Dmitry_B_Intel
Employee
‎04-01-2014 05:18 AM
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Esteban,

The MKL performance charts show the performance of other FFT problems than that measured by the benchmark code from Heiko's page.
In particular, the MKL charts show performance of a single transform, while the benchmark runs FFTs of 2 or 4 interwoven data sets. Genuine FFTW is good at such layouts.

A good starting place for benchmarking FFTs is http://www.fftw.org/benchfft/.

Thanks
Dima

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