Performance and polycount (again)

Amt0571 · Post by **Amt0571** » Sat Oct 21, 2006 4:14 pm

Hello,

A few weeks ago I posted a thread about performance issues with irrlicht and "high" polycounts. The original thread is this http://irrlicht.sourceforge.net/phpBB2/ ... erformance

Well, I couldn't try anything until yesterday, since my 6600GT decided to die, and I had tu buy a new card.

I have finally received an X800XT (which is more powerful) and still get the same frame rate as with the 6600GT in my irrlicht scene.

I have also noticed that CPU usage goes up to 100% constantly when I'm running my application. I think this is strange since I'm not using any physics (except basic collision detection) or anything which requires such a high computing power.

I have also tried to group the meshes which use the same material as Hybrid suggested in the other thread, but the performance still remains the same.

Any suggestion of what may be happening?

Thanks!

Valtras · Post by **Valtras** » Sat Oct 21, 2006 4:19 pm

100% constantly when I'm running my application.

It's normal... any game use a while loop as main loop and it is executing constantly...

Any suggestion of what may be happening?

VSync turned on?

Amt0571 · Post by **Amt0571** » Sat Oct 21, 2006 5:50 pm

Ok, I didn't know that the while loop caused the CPU to ramp up to 100% in any case.

I have vsync turned off. I still think it's a CPU limitation, because if I underclock the CPU, it goes slower, and the graphics card does not seem to make much of a difference (as long as its a decent one).

I was going to try NVPerfHud the day my 6600GT died... is there any similar tool for ATi cards? I have been unable to find anything similar.

Thanks!

JP · Post by JP » Sat Oct 21, 2006 6:30 pm

If you don't want the game to use 100% processor then just stick a sleep() statement at the end of your while loop and it will then allow other processes to run.

Amt0571 · Post by **Amt0571** » Sat Oct 21, 2006 8:27 pm

I placed the sleep() statement and it tells me the function is undeclared. I have been googling a bit and I found someone who told that this function is "obsolete"?

Thanks

Strong99 · Post by **Strong99** » Sat Oct 21, 2006 9:41 pm

You have to set Sleep(x) with an value for example Sleep(1) to sleep 1 millisec, for Sleep() you need (for windows) window.h

Amt0571 · Post by **Amt0571** » Sat Oct 21, 2006 9:58 pm

Thanks! I'll try it!

CodeDog · Post by **CodeDog** » Sun Oct 22, 2006 1:08 am

#include <windows.h> // for Sleep()

If you are using Irrlicht and Win32.

3ddev · Post by **3ddev** » Sun Oct 22, 2006 5:22 am

Make sure you include:

Code: Select all

#define WIN32_LEAN_AND_MEAN

before you include <windows.h>. I got a whole line of errors when I forgot about this!

Amt0571 · Post by **Amt0571** » Sun Oct 22, 2006 4:34 pm

I didn't include this and it worked just by including windows.h.

Anyway, It still sucks most of the CPU, and the performance problem is still there.

xtheagonyscenex · Post by **xtheagonyscenex** » Mon Oct 23, 2006 9:03 pm

there a ocing tool for ati called atitool
BUT BEWARE I FRIED 9600 XT BY TWEAKING THE MEMORY TIMINGS
and ocing a new card voids the warranty
anyway thats just me go for it

Amt0571 · Post by **Amt0571** » Mon Oct 23, 2006 9:56 pm

What I would like is to improve performance without overclocking anything :p

Irrlicht Engine

Performance and polycount (again)

Performance and polycount (again)

One more thing...