[Mesa-dev] [Bug 97260] [bisected] R9 290 low performance in Linux 4.7

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97260

--- Comment #28 from Kai <kai at dev.carbon-project.org> ---
(In reply to Michel Dänzer from comment #27)
> (In reply to Kai from comment #26)
> > (In reply to Alex Deucher from comment #25)
> > > Is anyone still having issues with vblank_mode=0?
> > 
> > With or without Michel's patch
> > (<https://patchwork.freedesktop.org/patch/106274/>), [...]
> 
> My patch doesn't have any effect with vblank_mode=0, which is why Alex
> asked.

Ah, ok. That wasn't clear to me.

> However, if there are still issues with that, I'd like them to be
> tracked in a separate report, ideally with an independent bisection
> confirming they started with the same kernel change.

For me it doesn't matter if I set vblank_mode=0 or not. With your patch applied
I'm getting 30 FPS in XCOM 2 either way (also doesn't matter if I enable VSync
in the game's options or not, though the FPS graph is smoother and closer to 30
FPS flat with VSync on).

This is with 4.7.2, LLVM r279473, Mesa a2ae67aa47 +
<https://patchwork.freedesktop.org/patch/106274/> and otherwise the stack
described in comment #22.

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