* FFTW, Re: [Caml-list] Array Optimizations
@ 2001-11-08 23:06 David Gurr
2001-11-08 23:23 ` David McClain
2001-11-09 9:16 ` Markus Mottl
0 siblings, 2 replies; 3+ messages in thread
From: David Gurr @ 2001-11-08 23:06 UTC (permalink / raw)
To: caml-list, barabh
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
2001-11-08 23:06 FFTW, Re: [Caml-list] Array Optimizations David Gurr
@ 2001-11-08 23:23 ` David McClain
2001-11-09 9:16 ` Markus Mottl
1 sibling, 0 replies; 3+ messages in thread
From: David McClain @ 2001-11-08 23:23 UTC (permalink / raw)
To: David Gurr, caml-list
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:
http://caml.inria.fr/FAQ/
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http://caml.inria.fr
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: FFTW, Re: [Caml-list] Array Optimizations
2001-11-08 23:06 FFTW, Re: [Caml-list] Array Optimizations David Gurr
2001-11-08 23:23 ` David McClain
@ 2001-11-09 9:16 ` Markus Mottl
1 sibling, 0 replies; 3+ messages in thread
From: Markus Mottl @ 2001-11-09 9:16 UTC (permalink / raw)
To: David Gurr; +Cc: caml-list, barabh
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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