FFT/drawpixel speed test

[JoeMac]

Looking for volunteers to test a piece of code for speed. It combines FFT (high pass) with Read/drawpixels so don't be surprise if the scene looks a little odd. I have to make a recommendation for a video card to run this on, so any tests would be appreciated - specifically I'd like to test Radeon 7500/Geforce 2, and up.
Instructions: Run Maze2.exe, type in any initials(up to 8 chars), then use 'D' as the input file. Escape key (or entering the opposite alcove) will exit the maze.
Download at http://www.cs.dal.ca/~macinnwj/downloads/FFTMaze.zip
Thanks!
Joe

[Diapolo]

It showed 0,5 fps on my GeForce3 with 27.30?

Diapolo

[Sundy]

I get 0.18 fps on my Geforce2 MX
-Sundar

[JoeMac]

I get the picture. I know my Fourier Transform isn't very fast, but I was hoping that some cards would deal with the read/draw pixels a little better. Any Radeon's out there?
Joe

[yakuza]

I've got a Radeon 7200 (aka 64DDR vivo), but I'm at work now. I will test for you when I get home this evening.

edit: With Humus' input below, I doubt the feedback on my 7200 is necessary.

[This message has been edited by yakuza (edited 02-19-2002).]

[Humus]

0.45 fps on a Radeon 8500.

[jwatte]

Why are you reporting only the card name? Chances are, the read is reasonably fast, and the bottleneck is the FFT; thus your CPU and memory speeds would matter much more.

Have you profiled the FFT to measure how long it takes? Compared it to the readpixels? And, to make sure it's readpixels, and not rendering, have you put a glFinish() before you start timing ReadPixels?

[JoeMac]

Part of the bottleneck is the FFT, but the following is what I get on my 1.2G Athlon with a Radeon VE
No draw/readpixels or FFT - 85 fps (monitor refresh)
draw/readpixels, no FFT - 3 fps
draw/readpixels and FFT 0.25 fps
Good point with machine differences on the FFT though. I've reposted the same program with read/drawpixels without the FFT at:
http://www.cs.dal.ca/~macinnwj/downloads/FFTDemo.zip

Hopefully this will be a better test of the card's role.
Thanks to everyone who tested (and will re-test)
Joe

[thewizard75]

System:
Dual PIII 800Mhz
Elsa Gladiac (Geforce 2 GTS 32MB)

FFTMaze: 0.238 fps
FFTDemo: 6.9-7.5 fps (oscillates)

Hope this helps...

[JoeMac]

Yakuza: I'd like to see the numbers anyway. If the 7200 does nearly the sam job, I'll save the extra money. Its starting to look like none of these cards do a decent job on glreadpixels.
Joe