DarkPlaces from Xonotic 0.8.5 higher cpu/gpu use

[Baker7]

DarkPlaces compiled from Xonotic 0.8.2 - darkplaces-wgl.vcproj Debug 32 vs. DarkPlaces compiled from Xonotic 0.8.5 - darkplaces-wgl.vcproj Debug 32

On a basically empty Q3 map I made that has no dynamic lights ... and with cl_maxfps set to 72.

The DarkPlaces compiled from 0.8.5 uses 40% cpu and my graphics card fan starts blowing within a minute and I expect that within another minute Windows thermal shutdown will happen.

The DarkPlaces compiled from 0.8.2 uses 24% cpu and is as cool as a cucumber

( and I have accidentally had it running in the background for hours and hours many times before and I can't remember the last time it caused the fan to start churning with my rather vanilla normal use settings).

[bones-was-here]

WGL is deprecated and basically unmaintained, and nobody builds div0-stable that way. If you're doing any development and/or want the latest DP you should use master branch (the sources in 0.8.5 are div0-stable branch). If not, you should use the xonotic.exe (SDL2) included in the zip (cross-compiled on linux by the official build system).

edit: there's no WGL (or GLX) in current (master) DP, only SDL2.

[Baker7]

I just wanted to say thank you for the reply. I understand everything you said regarding versions and am aware the current DP is SDL2 only.

I am using the 0.8.2 for a few different reasons including I know the behavior. At some point I will likely switch to the current version.

I have done quite a few user interface changes, should they ever interest you guys they are visually summed on this page (visually, for ease of seeing them).

https://www.moddb.com/mods/zircon-engine/tutorials/visual-guide-to-engine-changes

Keep up the great work!

[bones-was-here]

Apart from any build issues, I'd need to know more about what you're doing exactly so as to reproduce the issue, it doesn't look like you're playing Xonotic :P

A CPU/GPU load increase for the same content implies FPS reduction when the hardware can't sustain the configured maxfps and ticrate, but in practise we see the opposite: 0.8.5 performs better than 0.8.2, especially when considering worst-case frametimes.

If DP recognises that it's window is minimised it doesn't render anything, but if it's running a server that will continue to use resources.

[Baker7]

My 2012 laptop has Intel Integrated and it is likely that since 0.8.5 is using OpenGL 3 some of the functions are run via software emulation, while 0.8.2 using OpenGL 2 it is run fully on the GPU.

Which would result in high cpu use, etc.

So that is more than likely what is going on. Also whatever drivers the 2012 laptop has, it is not multithreaded OpenGL drivers so that sure doesn't help.

I'm not primarily running Xonotic, I'm exploring the idea of open source single player/cooperative play using libre resources to flesh out the ideas. As Xonotic is a large pool of working DarkPlaces features in action, Xonotic has been great to dig into (both the qc source and the maps). In fact, at some point I may have some Xonotic compatible "mods".

Back to the issue: really there is none. My 2012 laptop doesn't like OpenGL 3 much and in time there will be no more machines from 2012 left.