[Bug 90378] [LLVM][bisected] GPU lockups in Left 4 Dead 2

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90378

Daniel Scharrer  changed:

   What|Removed |Added

 Status|NEW |RESOLVED
 Resolution|--- |FIXED

--- Comment #10 from Daniel Scharrer  ---
With that patch series merged I can no longer reproduce the GPU lockups.

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[Bug 90378] [LLVM][bisected] GPU lockups in Left 4 Dead 2

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90378

--- Comment #9 from Daniel Scharrer  ---
Hi Marek,

Looks like http://lists.freedesktop.org/archives/mesa-dev/2015-July/089950.html
does help. With latest LLVM + Mesa + that patch series, glitches and lockups
seem to be gone. I got one lockup when replaying L4D2-radeonsi.trace after
rebuilding mesa, but could not reproduce it after reboot or in game (tested in
L4D2, CS:GO and The Talos Principle).

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[Bug 90378] [LLVM][bisected] GPU lockups in Left 4 Dead 2

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90378

--- Comment #8 from Daniel Scharrer  ---
I have confirmed that the issues is still the same with Mesa git-ff0a41b + LLVM
r241381: L4D2 has glitches and lockups with unpatched LLVM and no glitches or
lockups with unpatched LLVM and R600_DEBUG=switch_on_eop.

However other source engine games (Counter-Strike: Global Offensive and Team
Fortress 2) still have similar-looking glitches even with patched LLVM *and*
R600_DEBUG=switch_on_eop. No idea if those are related though.

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[Bug 90378] [LLVM][bisected] GPU lockups in Left 4 Dead 2

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https://bugs.freedesktop.org/show_bug.cgi?id=90378

--- Comment #7 from Daniel Scharrer  ---
Yes, afair R600_DEBUG=switch_on_eop fixed all issues with L4D2. I'll re-test
with a more up to date build of LLVM and Mesa.

> Adding Tom in case he has an opinion on the LLVM issue.

Looks like he already had a look at some of the LLVM parts in bug #88978.

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[Bug 90378] [LLVM][bisected] GPU lockups in Left 4 Dead 2

[bugzilla-dae...@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90378

Marek Olšák  changed:

   What|Removed |Added

 CC||tstellar at gmail.com

--- Comment #6 from Marek Olšák  ---
Hi Daniel,

Adding Tom in case he has an opinion on the LLVM issue.

(In reply to Daniel Scharrer from comment #2)
> As with bug #90510, R600_DEBUG=switch_on_eop gets rid of the glitches, and
> also prevents the crashes as well. Not sure if that means it could be a bug
> in Mesa or if that just hides the LLVM bug.

Does this mean switch_on_eop fixes this bug completely?

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[Bug 90378] [LLVM][bisected] GPU lockups in Left 4 Dead 2

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https://bugs.freedesktop.org/show_bug.cgi?id=90378

--- Comment #5 from Daniel Scharrer  ---
While the glitches come from an earlier revision than the GPU lockups, both are
caused by the machine scheduler. Disabling the machine scheduler for SI fixes
both the glitches and the GPU lockups. See bug 88978 for details.

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[Bug 90378] [LLVM][bisected] GPU lockups in Left 4 Dead 2

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https://bugs.freedesktop.org/show_bug.cgi?id=90378

Michel Dänzer  changed:

   What|Removed |Added

Summary|[radeonsi][bisected] GPU|[LLVM][bisected] GPU
   |lockups in Left 4 Dead 2|lockups in Left 4 Dead 2

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