[Bug 88758] Low FPS in settings on Dota2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=88758

--- Comment #21 from Lorenzo Bona <lorenz.bona at gmail.com> ---
(In reply to smoki from comment #19)
> (In reply to Lorenzo Bona from comment #18)
> > Reverting this commit 
> > 
> > http://cgit.freedesktop.org/mesa/mesa/commit/src/gallium/drivers/radeon/
> > r600_buffer_common.c?id=7b4276d7acf2e0f77044cb50caa6ad936fa78786
> > 
> > helps a little bit.
> > 
> > But it's not as fluid as on 3.16rc6 kernel.
> 
>  That same mesa used with 3.16rc6 and drm-fixes-3.19? Does those two kernels
> have same/similar performance (without that large drop), but just
> drm-fixes-3.19 is not so fluid like when 3.16rc6 kernel is used?
> 
>  And you builded that mesa now with -mtune=native for both CFLAGS and
> CXXFLAGS?
> 
>  Asking all those because i don't have those sttuter problems with 3.19
> kernel and that reverted but that is on APU... than it seems to me like only
> dedicated cards are affected.

Yeah.
I've compiled mesa, with both -march and -mtune set to native on CFLAGS and
CXXFLAGS.

On 3.16rc6 is running like a charme (I've never seen radeonsi so fast), on 3.19
is crap, BUT this is only for 32bit program(s) (tested only Dota2).

Unigine Valley results are almost the same on both kernel.
Near 5000 points, max FPS around 40, min FPS around 7 and average near 27FPS.

So is it something related to architecture, from my poorly point of view.

(In reply to Alex Deucher from comment #20)
> For 3.19, you may be hitting:
> https://bugzilla.kernel.org/show_bug.cgi?id=90741

Mmm but with that bug people are experiencing pauses, I don't have pauses but
costant low FPS.

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