Optimal fps tips ?

[Brovic]

While testing the maximum fps a mmf app could reach I noticed something weird.
The test application is classic : a counter updated every second by an "always" incremented alterable value.

The weird thing is when you fix the fps at 500 in MMF, just see the results (at least on my PIV 2.26Ghz) :
- fps set at 499 => the app runs at 499 fps
- fps set at [color:#CC0000]500[/color] => the app runs at [color:#CC0000]262[/color]fps !!
- fps set at 501 => the app runs at 499 fps

Of course it was just for a testing purpose, most lcd screens are around 65hz so no need to go beyond but why does that specific [color:#CC0000]500 [/color]fps value blows the framerate ?

If there is a technical reason that implies, for exemple, that a 64 or 66 fps setting is more optimal than a rounded 65 it may be worth knowing it.

[Verd0uX]

you must have a weird visual sync or cpu independant speed.
also, check what timing events you have going, based around the actual time object.
epicentre ftw

[SEELE]

agreed, this must be a local problem. the chance of such an obvious and huge bug going undetected for so long is unrealistic.


btw(epicentre basiclly quoted me(had a few))

[xyzzy]

huh i get a similar result: 1000FPS will hover around 400, 999FPS will be about 500

[Brovic]

Weird, it behaves exactly the same on my old PIII under windows 2000 (framerate 499 => counter = 499 || framerate 500 => counter = 260) and it is a matrox card while I use a Nvidia Geforce on my PIV so same problem despite the card, the CPU and the system are different.

BUT it is almost OK on my laptop (Pentium M 2Ghz under XP)! 499=>499 || 500=>485 (slightly less though)

Weird. Not a local bug but not an universal one and I can't see why it occurs on two totaly different configurations and not on the laptop.

Edit : I added my MFA test - testFPS

[Grim]

lol, that's really odd, I've got same results like Brovic

[Benicle]

Heh I just tried this out and I too have it drop down to about 260 fps when it's set to exactly 500.

I'm on a Intel C2D 2.16Ghz with XP

[BrandonC]

AMD Athlon 64 X2 5000+ with Vista

Strangely enough, I really don't get any of these weird framerate occurrences.

You guys are all lying. j/k This is strange though.

[DanielRehn]

Intel Centrino 1.6GHz
My framerate is ok ^^

[neat_Kliker2]

happens here on an old P4 as well, 260FPS with 500 set, 470FPS with 501 set