On 2015-12-24 17:34:18, Kenneth Graunke wrote: > This morning, I woke up and somehow "knew" what was causing my HS GPU hangs > on Gen7/7.5. It turns out I was (completely) wrong, but through some > miraculous series of illogical leaps, I arrived at a solution anyway. > > I don't honestly know how I got it working on Christmas Eve after > failing to figure it out for months on end. After exhausting every bit > of documentation and every tool available, and finding zero information, > somehow randomly flailing in the dark resulted in a solution, today of > all days. Honestly, I had pretty much no hope for figuring this out, > so I'm relieved to have it working at last... > > It turns out that setting interleave on the EOT URB write does bad things. > Fixing this fixed all the GPU hangs when releasing inputs one at a time, > I then added back the ability to release inputs in pairs, which caused > more GPU hangs. It turned out I needed to be more careful and enable > both halves.
Wow. That sucks that it wouldn't hang when a single test was run, and the simulator didn't help either. :( Nice work debugging it though! Series Reviewed-by: Jordan Justen <[email protected]> _______________________________________________ mesa-dev mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-dev
