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[.net] CPU usage

Started by bogan Jun 30, 2006 at 2:14 AM 2 replies 850+ views

Original Post

Jun 30, 2006 at 2:14 AM

Hello, i am working on a map editor, writing it in c#. i use tao for opengl bindings. I use a usercontrol for opengl drawings as nehe tutorials do. I call drawscene method in mousemove action. The problem is when i increase the control size from( 950 X 750) to (1000 X 800) the cpu starts to use 98%. In 950 X 750 it uses 3%. Does anyone have any idea?

Cryogenic

Jul 4, 2006 at 3:42 PM

Verify your call stacks in both situations. It might help you see what's happening. Also you can use Spy++ if you have it to see if any windows messages anomalies have apeared.

Telamon

Jul 4, 2006 at 7:53 PM

Are you by chance using a dual monitor setup? If a graphics surface in Win XP needs to be split across two monitors, updates go all the way down to the gdi kernel and then back out - this will kill your framerate and up your cpu usage by a lot. Just a thought.

Rob Loach

219

Rob Loach

Jul 4, 2006 at 9:11 PM

If you're doing any Sleep function calls, that really increases the CPU usage. You really shouldn't be that concerned though, as it's just checking the wait delay between events.

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