Wine performance (opengl)

[nlataill]

Hi,

I am using wine to play World of warcraft (this game is using opengl, and is
threaded - 2/3 threads IIRC). I did recently find a reproductable
performance regression on versions 0.9.24+.

Under the same conditions (always difficult to get in an MMORPG game, but
this is reproductible), version 0.9.23 gives me 20/25% more FPS than
versions 0.9.24->0.9.26 (have not tried .27 yet).

- Is this performance regression known/expected on opengl/threaded
applications (new codebase) ?
- Is someone using WOW here (and has found a similar preformance regression)
?
- It is worth for me to start looking at it (more measures, throw oprofile
at it, bissect the change...)

Thanks,

Norbert

[Roderick Colenbrander]

> Hi,
>
> I am using wine to play World of warcraft (this game is using opengl, and
> is
> threaded - 2/3 threads IIRC). I did recently find a reproductable
> performance regression on versions 0.9.24+.
>
> Under the same conditions (always difficult to get in an MMORPG game, but
> this is reproductible), version 0.9.23 gives me 20/25% more FPS than
> versions 0.9.24->0.9.26 (have not tried .27 yet).
> - Is this performance regression known/expected on opengl/threaded
>
> applications (new codebase) ?
> - Is someone using WOW here (and has found a similar preformance
>
> regression)
> ?
> - It is worth for me to start looking at it (more measures, throw oprofile
>
> at it, bissect the change...)
>
> Thanks,
>
> Norbert

I have done lots of OpenGL work lately. I have mainly moved some code from opengl32.dll over to gdi32.dll and winex11.drv. I don't think I have done anything heavy between 0.9.23 and 0.9.24 which might have killed performance. A regression test could be usefull. Are you sure that the regression didn't happen between lets say 0.9.24 and 0.9.25? In there I changed the location of the DisabledExtensions registry key from hkey_local_machine to hkey_current_user. When you disabled VBOs using this extension you could gain more performance on some videocards+drivers. I guess that you are seeing this.

Regards,
Roderick

[nlataill]

Hi,
> I have done lots of OpenGL work lately. I have mainly moved some code from
> opengl32.dll over to gdi32.dll and winex11.drv. I don't think I have done
>  anything heavy between 0.9.23 and 0.9.24 which might have killed

performance.
> A regression test could be usefull. Are you sure that the regression

didn't happen
> between lets say 0.9.24 and 0.9.25?

Well, I am investigating this now (see below).

I remember staying at .23 because when .24 was out the degradation was
quite noticable.

I am now building the .23, .to .27 trees with the exact same compiler,
options (-fno-stack-protector -O2), driver (nv 9xxx), wow configuration,
and without any tree changes (I did hack opengl_ext.* since some time for
performance). I keep you informed.

Thanks,

Norbert