[Bug 82050] R9270X pyrit benchmark perf regressions with latest kernel/llvm

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82050

--- Comment #35 from Andy Furniss <adf.lists at gmail.com> ---
(In reply to comment #33)
> (In reply to comment #28)
> > > I submitted the change reverting the behaviour of PIPE_USAGE_STREAM for
> > > review, but it's strange: I couldn't notice any significant difference in
> > > stutter in Valley regardless of any of these changes.
> 
> Also, according to
> GALLIUM_HUD=requested-VRAM+VRAM-usage,requested-GTT+GTT-usage, Valley only
> seems to allocate about 10-20 MB for streaming BOs, so I'm not sure why
> putting them in VRAM or not makes such a big difference for you.
> 
> 
> > > BTW, what CPU are you using?
> > 
> > It's an AMD Phenom II x4 965be.
> 
> I assume the chipset for that doesn't support PCIe 3.0, does it? I wonder if
> maybe streaming BOs should be in VRAM with PCIe 3.0 but not with PCIe 2.0.

Yea I am PCIE 2.0.

Other settings which may or may not be relavent -

vblank_mode=0, swapbufferswait off, 1920x1080 fullscreen, quality high,
antialiasing off.

I tried with hud and see 10-20MB requested with the stream change reverted and
8kb with it.

The fps counter on hud does show the pauses - though even the good case looks
bad on that - but the biggest pauses it shows are between scenes when the
screen has faded to black, I guess you kind of expect something to be loading
then.

I'll upload a couple of screens.

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