[Steve Harris]
>On Sat, Feb 28, 2004 at 11:57:27 +0200, Jussi Laako wrote:
>> On Sat, 2004-02-28 at 16:53, Steve Harris wrote:
>>
>> > Do you have the SIMD optimisations on, and have you tried the
>> > "halfcomplex" mode of FFTW, thats fine for audio, and saves some memory
>> > i/o.
>>
>> No, beca
On Sat, Feb 28, 2004 at 11:57:27 +0200, Jussi Laako wrote:
> On Sat, 2004-02-28 at 16:53, Steve Harris wrote:
>
> > Do you have the SIMD optimisations on, and have you tried the
> > "halfcomplex" mode of FFTW, thats fine for audio, and saves some memory
> > i/o.
>
> No, because SIMD optimizations
On Sat, 2004-02-28 at 17:47, Tim Goetze wrote:
> btw, http://www.fftw.org/speed/ paints an altogether different
> picture.
Anyway, speed difference is rather small. FFTW seems to be a bit faster
on Athlon, but which one is faster depends on so many things that it
doesn't make any practical differ
On Sat, 2004-02-28 at 17:47, Tim Goetze wrote:
> i assume 'halfcomplex' is what is called 'real' in Jussi's benchmark
> output. one thing that makes me wonder is that my copy of Ooura's
> routines seems to work with double precision only.
libDSP contains (among other things) C++ class implementat
On Sat, 2004-02-28 at 16:53, Steve Harris wrote:
> Do you have the SIMD optimisations on, and have you tried the
> "halfcomplex" mode of FFTW, thats fine for audio, and saves some memory
> i/o.
No, because SIMD optimizations are broken. I've been unable to compile
version which is able to run on
On Sat, 2004-02-28 at 15:43, Tim Goetze wrote:
> is the benchmark code you use available somewhere?
Older version with some parts removed is in libDSP CVS.
--
Jussi Laako <[EMAIL PROTECTED]>
[Steve Harris]
>On Sat, Feb 28, 2004 at 02:43:18PM +0100, Tim Goetze wrote:
>> [Jussi Laako]
>>
>> >Here are some numbers from my benchmark... On 2.4 GHz Celeron.
>> >
>> >Ooura:
>> >59 us / 1024 point complex FFT (single), 16949 FFTs/s, 17.356 MS/s
>> >86 us / 1024 point complex FFT (double), 116
On Sat, Feb 28, 2004 at 02:43:18PM +0100, Tim Goetze wrote:
> [Jussi Laako]
>
> >Here are some numbers from my benchmark... On 2.4 GHz Celeron.
> >
> >Ooura:
> >59 us / 1024 point complex FFT (single), 16949 FFTs/s, 17.356 MS/s
> >86 us / 1024 point complex FFT (double), 11628 FFTs/s, 11.907 MS/s
[Jussi Laako]
>Here are some numbers from my benchmark... On 2.4 GHz Celeron.
>
>Ooura:
>59 us / 1024 point complex FFT (single), 16949 FFTs/s, 17.356 MS/s
>86 us / 1024 point complex FFT (double), 11628 FFTs/s, 11.907 MS/s
>32 us / 1024 point real FFT (single), 31250 FFTs/s, 32.000 MS/s
>365 us /
