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Re: IDL performance and FFTs (was: call external speed) [message #12976 is a reply to message #12887]

Sat, 19 September 1998 00:00

stevenj
Messages: 5
Registered: September 1998

Junior Member

menakkis@my-dejanews.com wrote:
> [...]
> They also state that the 2D FFT is multithreaded and will take advantage of a
> multiprocessor environment if you want it to, and - the tantalising part -
> that this will work even if your program (that calls their lib) is
> single-threaded. [...]

Incidentally, FFTW has multi-threaded routines, too, which can also be
called from a single-threaded application. (You just pass as a parameter
the number of threads you want them to use.) As far as I know, though,
FFTW hasn't been benchmarked against the Intel libraries, so I don't know
how they compare. (Anyone who's interested can download the benchFFT
application from http://theory.lcs.mit.edu/~benchfft, and add the Intel
routines to the benchmark.)

(Actually, Intel has two completely independent FFT libraries--one in their
Math Kernel Library, and one in their Signal Processing Library.)

Cordially,
Steven G. Johnson

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		IDL performance and FFTs (was: call external speed) By: roy.hansen on Wed, 16 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: krieger on Sat, 19 September 1998 00:00
		Re: IDL performance and FFTs (was: call external speed) By: stevenj on Sat, 19 September 1998 00:00

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