FFTW, Re: [Caml-list] Array Optimizations

FFTW, Re: [Caml-list] Array Optimizations

[David Gurr]

The core of FFTW is a compiler written in Ocaml that generates
C code.  It could be retargeted to gen Ocaml or Ocaml's intermediate
language Cmm.  -D
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Re: FFTW, Re: [Caml-list] Array Optimizations

[David McClain]

It would be interesting to compare FFTW's performance with the library that
I use for paralellized 2-D and 1-D FFT's written by Intel for the Pentium
architecture. I just ran a test of this based on comparisons from the Clean
list where they showed implementations ranging from 2 sec to 7 sec on a Sun
750 MHz (64 bit?). I ran my 1024 x 1024 2-D FFT on a Pentium II 350 MHz
single CPU under Win/NT 4.0 (SP6) and got times around 1.17 sec. (estimates
for the Sun workstation would be approx 4x speedup).

- DM

----- Original Message -----
From: "David Gurr" <gurr@mrs.med.ge.com>
To: <caml-list@inria.fr>; <barabh@qwest.net>
Sent: Thursday, November 08, 2001 4:06 PM
Subject: FFTW, Re: [Caml-list] Array Optimizations


> The core of FFTW is a compiler written in Ocaml that generates
> C code.  It could be retargeted to gen Ocaml or Ocaml's intermediate
> language Cmm.  -D
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> Bug reports: http://caml.inria.fr/bin/caml-bugs  FAQ:
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http://caml.inria.fr
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Re: FFTW, Re: [Caml-list] Array Optimizations

[Markus Mottl]

On Thu, 08 Nov 2001, David Gurr wrote:
> The core of FFTW is a compiler written in Ocaml that generates C code.
> It could be retargeted to gen Ocaml or Ocaml's intermediate language
> Cmm.  -D

It is probably easier and the result would most likely be a bit more
efficient when we just added a tool that creates OCaml-interfaces to
the generated C-library.

Regards,
Markus Mottl

-- 
Markus Mottl                                             markus@oefai.at
Austrian Research Institute
for Artificial Intelligence                  http://www.oefai.at/~markus
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