https://bugs.freedesktop.org/show_bug.cgi?id=82050
--- Comment #59 from Christoph Haag haagch@frickel.club --- (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.