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

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Comment # 60 on bug 82050 from
(In reply to comment #59)
> (In reply to comment #58)
> > (In reply to comment #57)
> > > I'm trying drm-next-3.18 and mesa git and many unreal engine demos are still
> > > broken like this:
> > > https://www.youtube.com/watch?v=NvgA9_B0dMo
> > 
> > Are you sure that's directly related to the Unigine Heaven stuttering
> > discussed in this report? E.g., does reverting the Mesa commit in question
> > help, or do you see similar symptoms in the Gallium HUD?
> 
> It does look like the same symptoms. Only rare and short hangs in unigine
> heaven, but frequent hangs of ~1-2 sconds in unigine valley. The HUD shows
> that these hangs mostly correlate with jumps in vram/gtt usage.
> 
> Is the mesa commit in question 150ac07b855b5c5f879bf6ce9ca421ccd1a6c938? If
> so, it doesn't revert cleanly anymore, but I can have a look if I can
> manually see how to do it.

Some Unreal are OK for me after a glitchy start.

I can reproduce what you see with Scifi hallway and Elemental - the latter is
very bad, the former did come good after a while.

I hadn't "seen" these two before today, as in the past they just bailed with an
llvm error.

I'll try, when I have time, to see if they are better with the revert.


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