Talking Performance: Low FPS due to being CPU bound

[DerRidda]

So, playing the demo of A Demon's Game I noticed that I can barely hit 30 fps on my GTX 970. That's because it is pegging a single CPU core to its maximum which means my GPU is only being <15% utilized.

 

That's on an AMD FX-6300 @ 3.5 GHz per core not the fastest but it should be enough.

 

That's probably related to Lua being single threaded but that's crazy low, Natural Selection 2 (on Linux) is pretty much the same, Lua + OpenGL (a crappy implementation at that), but that manages 50-60+ (can't tell exactly because of forced VSync) for me completely maxed out and is a visually very demanding.

 

So I would like to see what performance other people are seeing on what hardware and what OS and let's use A Demon's Game as a "benchmark", just the first large open room will do.

[Josh]

The performance problem was traced to what is probably a bug in Nvidia's latest driver:

https://devtalk.nvidia.com/default/topic/813945/general-graphics-programming/bug-report-non-active-fbo-causes-much-slower-rendering/

 

It does not occur in the previous driver.

[lxFirebal69xl]

So, playing the demo of A Demon's Game I noticed that I can barely hit 30 fps on my GTX 970. That's because it is pegging a single CPU core to its maximum which means my GPU is only being <15% utilized.

 

That's on an AMD FX-6300 @ 3.5 GHz per core not the fastest but it should be enough.

 

That's probably related to Lua being single threaded but that's crazy low, Natural Selection 2 (on Linux) is pretty much the same, Lua + OpenGL (a crappy implementation at that), but that manages 50-60+ (can't tell exactly because of forced VSync) for me completely maxed out and is a visually very demanding.

 

So I would like to see what performance other people are seeing on what hardware and what OS and let's use A Demon's Game as a "benchmark", just the first large open room will do.

 

I've talked with Josh about this, because I had the same issue, and guess what? I also have a GTX 970, I was getting like ~25 frames on every map I made.

The only way Josh and I found to make the frames a bit better is to me to make every light Static+Dynamic, which the game has already. Recently I had a friend play the game with a GTX670 and he had 60 fps constantly, then I made him play the same map with buffered lights, also 60 fps. Nvidia is clearly at fault here.

[DerRidda]

Alright then, let's hope for a fix.

[gamecreator]

http://www.leadwerks.com/werkspace/topic/12058-performance-issues/page__st__20#entry87743

[Genebris]

I think I also have had a big frame drop after installing new Nvidia driver in Skyrim once, so this can happen even with AAA games I guess.

[YouGroove]

I'm getting low performance like 8 fps also on my laptop , the map is really simple with one dir light and 5 spot lights, and FPSPlayer script , with a simple AI one doing only raycasting.

 

Does anyone uses many near sptolights in their game or only point lights ?

I think it's bad practice ti have many spotlights , specially in same room also.

[Josh]

Without seeing that map I can't really say what's going on there. I run maps with dozens of lights onscreen at once with hardly any performance penalty.

[YouGroove]

Without seeing that map I can't really say what's going on there. I run maps with dozens of lights onscreen at once with hardly any performance penalty.

In the desktop PC i have a solid 30-60 Fps gameplay with 15 spotlights and using more models and shaders.

So it was laptop related problem perhaps i think. i'll get the map and tets on desktop computer.