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liming80

Member Since 22 Jan 2011
Offline Last Active Feb 14 2014 09:05 AM

Posts I've Made

In Topic: Performance guidelines?

08 February 2014 - 01:28 AM


The thing is that I kindof hate writing rendering code so I'd like to avoid doing to much experimenting. I love the actual game development, just not the rendering. I'm only doing it because I need to hide my lack of art content. The existing solutions are either way too content driven or "impossible" to use with an existing game logic engine.

 

maybe some profile tools are good friends.(Pix, Intel:GPA,  NV:Nsight,  AMD:Perfstudio)

 


What are your personal experiences, what gave you boosts and what slowed things down?

 

in our project, the DP count and PS shader always hurt us.


In Topic: Who cut the core clock of GPU when my video game window is minimum? the runti...

26 October 2013 - 02:42 AM

Yup. Driver bug.

 

You said you minimize for a long time. If the system entered in suspension state in the meanwhile, it's quite likely the driver and/or the program will have a problem to restore to normal operation. You're using Windows XP which did an "ok job" with that.

 

Launching another GPU demanding game can trick the driver into restoring its GPU state.

 

Another thing to consider, if this is a laptop, the driver may be downclocking the GPU not because it goes idle, but because it is overheating. Hence it won't go up when you restore the window because it's still hot.

got it! thanks a lot!


In Topic: Who cut the core clock of GPU when my video game window is minimum? the runti...

25 October 2013 - 03:00 AM

It's a power-saving feature of the driver. D3D doesn't do any power saving. The problem is that the core speed doesn't come back up, so it's a driver bug.

 

I had a similar problem once: whenever I'd wake the PC from sleep, the GPU core speed was stuck at the speed it was when I put it to sleep. Maybe you're haveing the same problem - then it has nothing to do with the fact that you minimize your window, nor with D3D.

it seems that the only way i can do some things for this is to update my driver!

i will try! thanks for your attention!


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