GETTIMER() and SLEEP issues

[Hemlos]

Err,
I found more information on the GETTIMER() issue.

if SLEEP = 0 then my test program runs 4000 fps
if SLEEP = 1 then my test program runs 60fps

Adding 1 millisecond per frame shouldnt cause the frame rate to drop to 60 fps.
The frame rate should be 1000 fps.

Anyone have an idea of whats going on?

[Moru]

Did you set LIMITFPS?

Normaly you aren't supposed to get more than 500 FPS because that is the cap in GLBasic.
If I do a simple loop only displaying the FPS and put a SLEEP 1 in it, I get 512 FPS, if I remove the SLEEP I get 500.

[Hemlos]

ok...
The test program normally runs 4000 fps with LIMITFPS 60000

Now, I set it to 500:

LIMITFPS 500.
SLEEP 0 = 500 FPS
SLEEP 1 = 60 fps

It shouldnt drop to 60 fps if SLEEP is set to 1.
It should be hitting the max frame rate of 500.

[Hemlos]

Gernot, any input here?

[MrTAToad]

Dont forget that SLEEP returns control to the operating system.

[Hemlos]

Hmm, so windows is hogging my fps with sleep 1 ?

[Moru]

What did you set your grafics card to? Limit FPS or free FPS or Application desides?

[Hemlos]

nvidia gt6800

set FORCE VSYNC = OFF


Remeber when i had an issue with getpixel?
This was the solution.

[Moru]

Solution for getpixel should be AA = off.

[Hemlos]

indeed, but i want higher fps regardless.
the ability to of testing programs with extreme frame rates is desirable.

i found a workaround, i dont need sleep anymore,

[MrTAToad]

Hmm, so windows is hogging my fps with sleep 1 ?

It could be doing anything with it...

[Kitty Hello]

I have no idea. I really just call the SLEEP command from the operating system.

[MrTAToad]

i found a workaround, i dont need sleep anymore,

You shouldn't anyway...  Did you use GETTIMER directly after the sleep command as well ?

[Hemlos]

No, i only use GETTIMER() in my programs one time.....right before the SHOWSCREEN, as it reports the time since the last showscreen.

[MrTAToad]

I expect the time difference would be large between the SLEEP command causing the FPS to be less than what you would normally get.  I think the FPS value with SLEEP would be correct though, especially as it would slow everything down...