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Re: Working patch for FFTW 3.0.x and Nd FFT's
From: |
David Bateman |
Subject: |
Re: Working patch for FFTW 3.0.x and Nd FFT's |
Date: |
Tue, 17 Feb 2004 22:29:57 +0100 |
User-agent: |
Mutt/1.4.1i |
According to John W. Eaton <address@hidden> (on 02/17/04):
> I'm not sure of the best locations for them since I don't know the
> typical sizes of the data. Should they always go inside the innermost
> loops?
I'd rather they not go in the inner most loop. But the problem is what
happens in a case like "a = rand(2^20,1); fft(a)" which will call
convert_packcomplex_1d and will only call the outer loop once, but
the inner one "2^20 / 2 - 1" times. So, now that I think about it, I
really don't know either. It depends really on what data is handed to
them.
The fact is that these two routines occupy a minor proportion of the
time relative to the FFTW code itself. So a compromise might be to
just have a single call to OCTAVE_QUIT at the top of
convert_packcomplex_1d and convert_packcomplex_Nd.
Regards
David
--
David Bateman address@hidden
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- Working patch for FFTW 3.0.x and Nd FFT's, David Bateman, 2004/02/16
- Working patch for FFTW 3.0.x and Nd FFT's, John W. Eaton, 2004/02/16
- Re: Working patch for FFTW 3.0.x and Nd FFT's, David Bateman, 2004/02/17
- Re: Working patch for FFTW 3.0.x and Nd FFT's, John W. Eaton, 2004/02/17
- Re: Working patch for FFTW 3.0.x and Nd FFT's,
David Bateman <=
- Re: Working patch for FFTW 3.0.x and Nd FFT's, John W. Eaton, 2004/02/17
- Re: Working patch for FFTW 3.0.x and Nd FFT's, Paul Kienzle, 2004/02/17
- Re: Working patch for FFTW 3.0.x and Nd FFT's, John W. Eaton, 2004/02/18
- Re: Working patch for FFTW 3.0.x and Nd FFT's, Dmitri A. Sergatskov, 2004/02/18
- Re: Working patch for FFTW 3.0.x and Nd FFT's, John W. Eaton, 2004/02/18
- Re: Working patch for FFTW 3.0.x and Nd FFT's, Dmitri A. Sergatskov, 2004/02/18
- Re: Working patch for FFTW 3.0.x and Nd FFT's, Paul Kienzle, 2004/02/18
- Re: Working patch for FFTW 3.0.x and Nd FFT's, John W. Eaton, 2004/02/18
- Re: Working patch for FFTW 3.0.x and Nd FFT's, Paul Kienzle, 2004/02/19
- Re: Working patch for FFTW 3.0.x and Nd FFT's, John W. Eaton, 2004/02/20