* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
@ 2015-05-19 19:12 bugzilla-daemon
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To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
Bug ID: 90523
Summary: Easily reproducible GPU lockup (verde) with any mesa
10.5.x
Product: Mesa
Version: 10.5
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Gallium/radeonsi
Assignee: dri-devel@lists.freedesktop.org
Reporter: acab@digitalfuture.it
QA Contact: dri-devel@lists.freedesktop.org
A few seconds into certain games the GPU locks up and X crashes.
The same happens (albeit not as quickly) under other circumstances like playing
a video in a browser.
Last known good configuration is mesa 10.4.6.
Known bad configurations: 10.5.1, 10.5.2, 10.5.4, 10.5.5.
Are there any steps to follow to help diagnose the issue?
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
acab@digitalfuture.it changed:
What |Removed |Added
----------------------------------------------------------------------------
Hardware|Other |x86-64 (AMD64)
OS|All |Linux (All)
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
2015-05-19 19:13 ` bugzilla-daemon
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From: bugzilla-daemon @ 2015-05-19 19:20 UTC (permalink / raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Please attach your xorg log and dmesg output.
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
2015-05-19 19:13 ` bugzilla-daemon
2015-05-19 19:20 ` bugzilla-daemon
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From: bugzilla-daemon @ 2015-05-19 19:56 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
--- Comment #2 from acab@digitalfuture.it ---
I am sorry, but while trying to get a crash I've realized it's not mesa.
The culprit appears to be llvm.
In short:
llvm 3.5.2 + mesa 10.5.5 -> ok
llvm 3.6.0 + mesa 10.5.5 -> lockup
I'm going to attach the logs anyway.
Feel free to close this bug if it doesn't belong in here.
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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From: bugzilla-daemon @ 2015-05-19 19:58 UTC (permalink / raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
--- Comment #3 from acab@digitalfuture.it ---
Created attachment 115900
--> https://bugs.freedesktop.org/attachment.cgi?id=115900&action=edit
dmesg
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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From: bugzilla-daemon @ 2015-05-19 19:59 UTC (permalink / raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
--- Comment #4 from acab@digitalfuture.it ---
Created attachment 115901
--> https://bugs.freedesktop.org/attachment.cgi?id=115901&action=edit
xorg.log
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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From: bugzilla-daemon @ 2015-05-20 1:14 UTC (permalink / raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #115900|text/plain |application/gzip
mime type| |
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
Michel Dänzer <michel@daenzer.net> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #115901|text/plain |application/gzip
mime type| |
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
--- Comment #5 from Michel Dänzer <michel@daenzer.net> ---
Can you try isolating the LLVM change introducing it with git bisect? Note that
this might require some tweaking because current Mesa might fail to build
against some development snapshots of LLVM.
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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From: bugzilla-daemon @ 2015-05-20 13:51 UTC (permalink / raw)
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
--- Comment #6 from acab@digitalfuture.it ---
(In reply to Michel Dänzer from comment #5)
> Can you try isolating the LLVM change introducing it with git bisect? Note
> that this might require some tweaking because current Mesa might fail to
> build against some development snapshots of LLVM.
Yes I could, however upsteam appears to maintain llvm in svn.
There is a git repository as well but it lacks branches and tags.
Additionally the branch history doesn't look very linear and so far i've failed
to match the proper commit from the branch in master.
For example the top commit in
http://llvm.org/svn/llvm-project/llvm/tags/RELEASE_352/final is:
------------------------------------------------------------------------
r214336 | rafael.espindola | 2014-07-30 17:04:00 -0400 (Wed, 30 Jul 2014) | 9
lines
SimplifyCFG: Avoid miscompilations due to removed lifetime intrinsics.
Which appears to match commit 7fef5a3d1907c813712fcb2a44d8187a65ba08cd:
Author: Rafael Espindola <rafael.espindola@gmail.com>
Date: Wed Jul 30 21:04:00 2014 +0000
SimplifyCFG: Avoid miscompilations due to removed lifetime intrinsics.
However mesa 10.5.5 doesn't build against that llvm (doesn't like
TM->getSubtargetImpl()->getInstrInfo() in lp_bld_debug.cpp), but it does build
against 3.5.2.
Can you suggest some commit ids i could use as good and bad markers?
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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From: bugzilla-daemon @ 2015-05-21 2:23 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
--- Comment #7 from Michel Dänzer <michel@daenzer.net> ---
(In reply to acab from comment #6)
> Yes I could, however upsteam appears to maintain llvm in svn.
> There is a git repository as well but it lacks branches and tags.
The Git repository at http://llvm.org/git/llvm.git does have the release
branches. Also, the SVN revision number is included in the Git commit log, so
it's easy to find the Git commit corresponding to a given SVN revision e.g. in
gitk.
> r214336 | rafael.espindola | 2014-07-30 17:04:00 -0400 (Wed, 30 Jul 2014) |
> 9 lines
>
> SimplifyCFG: Avoid miscompilations due to removed lifetime intrinsics.
>
> Which appears to match commit 7fef5a3d1907c813712fcb2a44d8187a65ba08cd:
> [...]
> However mesa 10.5.5 doesn't build against that llvm (doesn't like
> TM->getSubtargetImpl()->getInstrInfo() in lp_bld_debug.cpp), but it does
> build against 3.5.2.
7fef5a3d1907c813712fcb2a44d8187a65ba08cd is on the master branch. The
corresponding commit on the release_35 branch is
a4cf325e41fca33c7ce7deef39a7bcf25fb38266.
However, as I mentioned before, you most likely will run into more similar
issues during the bisection, because Mesa can only test for minor versions of
LLVM, not for individual revisions. You may need to tweak the Mesa code to make
it build in some cases.
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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From: bugzilla-daemon @ 2015-05-22 20:33 UTC (permalink / raw)
To: dri-devel
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
--- Comment #8 from acab@digitalfuture.it ---
Bisecting across llvm major releases was a total pain in the arse, but then
I've realized that the bug was fixed recently in the 3.6 branch so I've given
up.
If it helps, i can tell you that the bug was fixed here (mind you good and bad
are reversed):
$ git bisect good
b5344bfff41583c00026e321d6831d4e8790b309 is the first bad commit
commit b5344bfff41583c00026e321d6831d4e8790b309
Author: Tom Stellard <thomas.stellard@amd.com>
Date: Mon May 4 19:50:17 2015 +0000
Merging r236307:
------------------------------------------------------------------------
r236307 | thomas.stellard | 2015-04-30 23:44:09 -0400 (Thu, 30 Apr 2015) |
4 lines
R600/SI: Add VCC as an implict def of SI_KILL
When SI_KILL has a register operand, its lowered form writes to vcc.
------------------------------------------------------------------------
Feel free to close the bug.
Thanks.
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* [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x
2015-05-19 19:12 [Bug 90523] Easily reproducible GPU lockup (verde) with any mesa 10.5.x bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=90523
Tom Stellard <tstellar@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
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