Author Topic: 100% CPU on simple program? (Read 9850 times)

Makuto · « **on:** March 03, 2011, 03:39:32 am »

Why is my simple program taking up 100% of my CPU? My code is from the documentation files (the first example).

Laurent · « **Reply #1 on:** March 03, 2011, 07:56:53 am »

Because you tell it to take 100% CPU. Well, in fact you don't tell it to not take 100% CPU

Simply use SetFramerateLimit, UseVerticalSync or Sleep to slow down your program and let the CPU do something else.

Makuto · « **Reply #2 on:** March 03, 2011, 03:40:38 pm »

What would you suggest I limit the frame rate to?

Laurent · « **Reply #3 on:** March 03, 2011, 04:13:57 pm »

Use vertical synchronization, it will give better visual results because the framerate will be synchronized with the monitor's refresh rate.

Makuto · « **Reply #4 on:** March 04, 2011, 12:45:43 am »

Is that in the documentation? I'm assuming it is. Thanks for the help.

Laurent · « **Reply #5 on:** March 04, 2011, 07:49:52 am »

It is, all functions are documented. I don't know if it's in the tutorials.

Makuto · « **Reply #6 on:** March 04, 2011, 02:28:22 pm »

I used the UseVerticalSync and the program looks really good now, but it still takes up 100%. Should I also limit the framerate?

Laurent · « **Reply #7 on:** March 04, 2011, 02:32:23 pm »

Really? It shouldn't. Try SetFramerateLimit (without UseVerticalSync), and if it still doesn't work then you probably have a problem.

Makuto · « **Reply #8 on:** March 07, 2011, 02:28:14 pm »

It's working now. Thanks for all of the help!

strongdrink · « **Reply #9 on:** March 24, 2011, 04:06:04 pm »

I have the same problem but it isn't working for me...
I'm using Ubuntu 10.10.

App.UseVerticalSync (true);

or

App.UseVerticalSync (false);
App.SetFramerateLimit (0x20);

both limit the rate, but the CPU satys at 100%

Makuto · « **Reply #10 on:** March 24, 2011, 04:14:04 pm »

I got rid of this problem a while ago. Limiting the frame rate seems to limit the CPU. I think your hardware might be affecting yours. Mine only runs like 10% now.

strongdrink · « **Reply #11 on:** March 24, 2011, 04:22:36 pm »

wurd.... hopefully in 2.0 it will be fixed :S

Tank · « **Reply #12 on:** March 24, 2011, 05:27:01 pm »

VSync seems to not work with all drivers. I had this problem once on my laptop with an ATI Radeon HD blah-blah-something. SetFramerateLimit() should work in any case.

strongdrink · « **Reply #13 on:** March 24, 2011, 11:30:53 pm »

Nope! I tried

Code: [Select]


  App.UseVerticalSync (false);
  App.SetFramerateLimit (0x20);

this

Code: [Select]


  App.UseVerticalSync (true);
  App.SetFramerateLimit (0x20);

this

Code: [Select]


  App.SetFramerateLimit (0x20);

and this

Code: [Select]


  App.UseVerticalSync (true);

on 2 differant computers, and it still maxed out the CPU at 100%

Laurent · « **Reply #14 on:** March 24, 2011, 11:31:48 pm »

Quote

My code is from the documentation files (the first example)

Which one?