[Bug 43277] Far Cry 3 has poor performance (Ryzen CPU-specific issue?)

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=43277

--- Comment #31 from Berillions <berillions at gmail.com> ---
Created attachment 61054
  --> https://bugs.winehq.org/attachment.cgi?id=61054
wineserver set to 2 cpus with htop

(In reply to Ivan Kalvachev from comment #30)
> (In reply to Matteo Bruni from comment #29)
> > If someone has any other idea how Wine could be implicated in the bug, that
> > would be interesting too.
> 
> I'd ask the user to try `taskset` utility and set CPU affinity to the
> `wineserver` so it is executed on a specific core/cpu_thread.
> Alternatively `htop` and pressing `a` might be used.
> 
> The `wineserver` process is single threaded and used for a number of windows
> kernel core function. Having it cause lag or delay would slow down all wine
> controlled threads.
> 
> If you look at this
> https://github.com/iXit/Mesa-3D/issues/313#issuecomment-379089675 benchmark,
> you can see that `wineserver` is using about 6 times more CPU in the
> threaded case.
> 
> As I've explained in the other thread: In Ryzen, 2 physical cores form a
> NUMA node that share L2 cache. Moving a process to another node means it
> looses all cached data. So this would lead to huge increase in CPU usage.

Hi Ivan,

I tried your suggestion 5 minutes ago and unfortunatly, it does not work for
me.
Like you suggested, i used htop to set "wineserver" to a single core and i use
the core #6 (cpu #11 & #12) like you can see on the screenshot. 

maybe i did something wrong but i did this way :
1- Launch Uplay to create wineserver process
2- Launch htop in a console and set cpu #11/#12 like on the screenshot
3- Launch FarCry 3 from UPlay

Result : Still have the same bad perf (~10-15FPS)

I tried to set "wineserver" on only one cpu (cpu#12) without success too.

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