[Bug 84662] Long pauses with Unreal demo Elemental on R9270X since : Always flush the HDP cache before submitting a CS to the GPU

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84662

--- Comment #33 from Andy Furniss <adf.lists at gmail.com> ---
(In reply to Andy Furniss from comment #29)
> (In reply to Michel Dänzer from comment #27)
> > Created attachment 107544 [details] [review] [review]
> > drm/radeon: Try placing NO_CPU_ACCESS BOs outside of CPU accessible VRAM
> > 
> > Please try current Mesa with no patches except for the two I just attached,
> > plus this kernel patch together with the previous kernel patch.
> 
> With these it's better but still a bad. There are still pauses but they are
> a bit shorter, the start time without intervention is still around 2min.
> Start time on a good is around 1 min (assuming first run or mem caches
> flushed).
> 
> Hud wise - pic to follow the vram req/used match well, but the gtt is still
> different from a good.
> 
> On the upside - Unigine Valley is the best I've ever seen it - way better
> than what I've called as good in the past.

I see the patches are on the list now, so just in case it wasn't expected -

Running patched kernel with unpatched mesa causes signal 7 when running games.

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