[Bug 89034] Firefox crashing xserver and some major rendering bugs

[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

            Bug ID: 89034
           Summary: Firefox crashing xserver and some major rendering bugs
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: smoki00790@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 113269
  --> https://bugs.freedesktop.org/attachment.cgi?id=113269&action=edit
valley_artifacts

Well i put this as radeosi bug as i am not sure if happens elsewhere. It is
LLVM bug actually which happens once subreg liveness is enabled, so svn 228228
is bisected as bad. I running current llvm with subreg liveness disabled, as
this is major/grave one bug for me.

 Same issue was present in Tom's perf branches last month once subreg liveness
is enabled too.

 Hardware is kabini (Athlon 5350), current Debian Sid 64bit, kernel 3.19.0,
xserver git, mesa git, etc...

 Attached is screenshot from Unigine Valley for example, there are major
rendering issues in many other GL apps.

 For Firefox crashing xserver not sure how to debug that (btw it crashed X
immidiate at starting FF) , if i build llvm with debug and assertations
screen/monitor somehow looks like it goes sleep mode (without any messages in
logs) and only hard reset helps. If i build llvm without those it just crashing
xserver, but there is not enough info in Xorg.0.log :(

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

smoki <smoki00790@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Attachment #113269|text/plain                  |image/png
          mime type|                            |

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
(In reply to smoki from comment #0)
>  Attached is screenshot from Unigine Valley for example, there are major
> rendering issues in many other GL apps.

Haven't seen such artifacts on Kaveri. Can you attach the stderr output of
running Valley or another affected app with R600_DEBUG=vs,ps with and without
the bisected commit?


>  For Firefox crashing xserver not sure how to debug that [...]

Is there something about it in the Xorg stderr output? It should be captured in
a gdm log file.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #2 from smoki <smoki00790@gmail.com> ---

 Well i can but i need first to make a bottle of coffee because one llvm build
takes 30 minutes on Kabini :D. but OK will do something... later...

 I don't have gdm.log as i don't use it, plain startx is used. I can only
attach Xorg.0.log without debug build... but well, later...

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
(In reply to smoki from comment #2)
>  Well i can but i need first to make a bottle of coffee because one llvm
> build takes 30 minutes on Kabini :D.

It shouldn't take that long after switching between the bisected commit and the
one before it (or just re-applying/reverting it on top of whatever later commit
you may have built last). If you're not using ccache yet, that might help a
little as well.


>  I don't have gdm.log as i don't use it, plain startx is used.

Then something like

startx [...] 2>stderr.txt

should capture the stderr output in a file.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #4 from smoki <smoki00790@gmail.com> ---
Created attachment 113272
  --> https://bugs.freedesktop.org/attachment.cgi?id=113272&action=edit
xcrash


 Using wihout patched llvm to post this as i can't use proper llvm with browser
to post this :D

 This is with debug llvm, but without asserts enabled likely there are
assertation there holding something to not logging, but dunno anyway might be
useful.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #5 from Michel Dänzer <michel@daenzer.net> ---
Please get a backtrace of the crash with gdb by attaching gdb to the Xorg
process via ssh before starting Firefox.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #6 from smoki <smoki00790@gmail.com> ---
(In reply to Michel Dänzer from comment #3)
> 
> Then something like
> 
> startx [...] 2>stderr.txt
> 
> should capture the stderr output in a file.

 Actually that one drop something, this is with debug+assertion enabled llvm
when monitor just gooes to "sleep" after starting firefox... seems like usefull
:) ?

 X: TargetRegisterInfo.cpp:189: virtual const llvm::TargetRegisterClass*
llvm::TargetRegisterInfo::getMatchingSuperRegClass(const
llvm::TargetRegisterClass*, const llvm::TargetRegisterClass*, unsigned int)
const: Assertion `A && B && "Missing register class"' failed.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #7 from Michel Dänzer <michel@daenzer.net> ---
Please get a gdb backtrace (bt full) for the assertion failure then. Bonus
points for running Xorg with R600_DEBUG=vs,ps and grabbing its stderr output
leading up to the assertion failure as well.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #8 from smoki <smoki00790@gmail.com> ---
 Well i think i can't do that, because i don't have another machine right now.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #9 from Michel Dänzer <michel@daenzer.net> ---
Alternatively, you can try using a script for gdb's --command option, something
like:

set logging on
set logging redirect
handle SIGPIPE nostop noprint
continue
bt full
continue
quit

That should capture the backtrace in a file called gdb.txt. See
http://wiki.x.org/wiki/Development/Documentation/ServerDebugging/#index6h2 for
more background.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #10 from smoki <smoki00790@gmail.com> ---
Created attachment 113309
  --> https://bugs.freedesktop.org/attachment.cgi?id=113309&action=edit
gdb.txt


 Hopefully i did it fine :) gdb.txt attached...

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #11 from smoki <smoki00790@gmail.com> ---
Created attachment 113310
  --> https://bugs.freedesktop.org/attachment.cgi?id=113310&action=edit
stderr.txt


 ...and stderr.txt

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #12 from smoki <smoki00790@gmail.com> ---
 Those seems interesting:

err = 0x7f6cbf5538f0 <error: Cannot access memory at address 0x7f6cbf5538f0>
buffer_data = 0x25 <error: Cannot access memory at address 0x25>

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #13 from sarnex <commendsarnex@gmail.com> ---
I'm getting this issue also. I thought it was my own fault because it was so
strange. I'm on Linux Mint, Kernel 3.19 and the crash happens when using LLVM
3.7 on Xserver 1.16 and git.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #14 from Lorenzo Bona <lorenz.bona@gmail.com> ---
I'm using llvm from debian/ubuntu nightly build and I'm experiencing quite the
same problem.

I've builded mesa against llvm3.7svn228689 yesterday evening.
KDE starts ok, with startx, but as soon as I open a window (terminal, dolphin,
firefox or what ever) X crash.

You can see my xserver crash log. (attachment 1)

The last good build was on llvm3.7~svn227765 which is around the 2nd of
February (nightly builds struggled since then in 32bit build, until yesterday
afternoon).
Also I'm facing many corruptions on 227765 build in Dota2. (attachment 2)

Switched back to llvm3.6rc2-2 and it's ok now, X doesn't crash and Dota2
corruptions are gone.

Sorry but I can't bisect using nigthly packages (I'm not able to build a .deb
from svn).

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #15 from Lorenzo Bona <lorenz.bona@gmail.com> ---
Created attachment 113343
  --> https://bugs.freedesktop.org/attachment.cgi?id=113343&action=edit
attachment_1_Xorg

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #16 from Lorenzo Bona <lorenz.bona@gmail.com> ---
Created attachment 113344
  --> https://bugs.freedesktop.org/attachment.cgi?id=113344&action=edit
attachment_2_Dota2

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #17 from Lorenzo Bona <lorenz.bona@gmail.com> ---
Sorry, I forget some infos:

mesa/xserver/ddx/drm from git
kernel drm-fixes-3.19
GPU: R7-265

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #18 from Tom Stellard <tstellar@gmail.com> ---
I have just committed a change to llvm svn that disables sub-reg liveness and 
filed an LLVM bug for this:

http://www.llvm.org/bugs/show_bug.cgi?id=22548

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--- Comment #19 from Lorenzo Bona <lorenz.bona@gmail.com> ---
Thank you Tom, with latest changes crashes and Valley rendering issue are gone
for me.
BTW I'm still facing rendering issue in Dota2.

Performances with LLVM-3.7 are great, about 30FPS in Valley. Nice.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #20 from Daniel Scharrer <daniel@constexpr.org> ---
(In reply to Lorenzo Bona from comment #19)
> BTW I'm still facing rendering issue in Dota2.

That looks a lot like bug #88978. You could try the trace posted there to see
if you are experiencing the same issue.

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Kai <kai@dev.carbon-project.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |kai@dev.carbon-project.org

--- Comment #21 from Kai <kai@dev.carbon-project.org> ---
*** Bug 89045 has been marked as a duplicate of this bug. ***

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #22 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 113709
  --> https://bugs.freedesktop.org/attachment.cgi?id=113709&action=edit
Patch to re-enable subreg liveness

I think this bug has been fixed.  This patch re-enables subreg livess.  Can you
see if the issue still exists with this patch applied to LLVM git.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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--- Comment #23 from smoki <smoki00790@gmail.com> ---
Created attachment 113715
  --> https://bugs.freedesktop.org/attachment.cgi?id=113715&action=edit
valley.png

(In reply to Tom Stellard from comment #22)
> Created attachment 113709 [details] [review]
> Patch to re-enable subreg liveness
> 
> I think this bug has been fixed.  This patch re-enables subreg livess.  Can
> you see if the issue still exists with this patch applied to LLVM git.

 Just tried it on top of svn230129... Firefox does not crash xserver anymore,
but rendering is still broken mostly fine now in valley, that "half picture"
broken rendering is also fixed
https://bugs.freedesktop.org/attachment.cgi?id=113269... but there are still
black squares appear here and there - see attachment. Basically firefox xserver
crash is fixed, but rendering in games is not... and i have some other examples
when rendering is much worse.

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #24 from smoki <smoki00790@gmail.com> ---
Created attachment 113716
  --> https://bugs.freedesktop.org/attachment.cgi?id=113716&action=edit
stacking.png


 In Stacking game (as another example) rendering is also borked but
differently, and so on...

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--- Comment #25 from Lorenzo Bona <lorenz.bona@gmail.com> ---
(In reply to smoki from comment #24)
> Created attachment 113716 [details]
> stacking.png
> 
> 
>  In Stacking game (as another example) rendering is also borked but
> differently, and so on...

Have you already tried this patch from Marek?
http://cgit.freedesktop.org/mesa/mesa/commit/?id=7692704b144b2aa9a57767a43212ceb5aad6638a

Rendering issue in Dota2 are quite gone now, sometimes you can see little
glitch here and there, but very rarely.

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--- Comment #26 from smoki <smoki00790@gmail.com> ---
 @ Lorenzo Bona

 That is for SI, i am on CIK... this issue whole another one, probably affect
all chips.

 @Tom

 There are also ~140 piglit quick tests failed once subreg liveness is enabled.

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--- Comment #27 from Daniel Scharrer <daniel@constexpr.org> ---
Also no X server crashed here on TAHITI with LLVM r230124 + your patch.

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--- Comment #28 from Tom Stellard <tstellar@gmail.com> ---
(In reply to smoki from comment #26)
>  @ Lorenzo Bona
> 
>  That is for SI, i am on CIK... this issue whole another one, probably
> affect all chips.
> 
>  @Tom
> 
>  There are also ~140 piglit quick tests failed once subreg liveness is
> enabled.

Which piglit tests regress and what GPU do you have?

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--- Comment #29 from smoki <smoki00790@gmail.com> ---
(In reply to Tom Stellard from comment #28)

> Which piglit tests regress and what GPU do you have?

 Kabini. I did fresh piglit run now and it shows there are 159 regressed now...
too many to be listed so i upload html summary:

 https://dl.dropboxusercontent.com/u/74553632/compare.tar.bz2

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--- Comment #30 from Michel Dänzer <michel@daenzer.net> ---
(In reply to smoki from comment #29)
> I did fresh piglit run now and it shows there are 159 regressed now...

I think at least the piglit regressions aren't directly related to sub-register
liveness and should be tracked in a separate bug report:

On my Kaveri, I've been seeing random failures of some (of the same as yours)
piglit tests recently (with sub-register liveness disabled). The only way I've
found to avoid those failures is to keep rebooting until I get lucky. It seems
like some recent change (most likely in Mesa?) causes the hardware to go into a
weird, semi-persistent state.

I'm afraid it might be tricky to bisect that, but it would be very helpful.

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--- Comment #31 from smoki <smoki00790@gmail.com> ---
(In reply to Michel Dänzer from comment #30)
> I think at least the piglit regressions aren't directly related to
> sub-register liveness and should be tracked in a separate bug report:

 Those regressions are only reproducable here with sub reg liveness enabled.

>On my Kaveri, I've been seeing random failures of some (of the same as yours) >piglit tests recently (with sub-register liveness disabled). The only way I've >found to avoid those failures is to keep rebooting until I get lucky. It seems >like some recent change (most likely in Mesa?) causes the hardware to go into a >weird, semi-persistent state.

>I'm afraid it might be tricky to bisect that, but it would be very helpful.

 That sounds like a separate one, but i don't have that and can't reproduce it
on Kabini. I only have some known of those sometimes fails at random, but those
are under "warn" and just few of them (i am talking about just 1-3 tests), but
no "fail" tests happens here at random.

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--- Comment #32 from Tom Stellard <tstellar@gmail.com> ---
(In reply to smoki from comment #31)
> (In reply to Michel Dänzer from comment #30)
> > I think at least the piglit regressions aren't directly related to
> > sub-register liveness and should be tracked in a separate bug report:
> 
>  Those regressions are only reproducable here with sub reg liveness enabled.
> 
> >On my Kaveri, I've been seeing random failures of some (of the same as yours) >piglit tests recently (with sub-register liveness disabled). The only way I've >found to avoid those failures is to keep rebooting until I get lucky. It seems >like some recent change (most likely in Mesa?) causes the hardware to go into a >weird, semi-persistent state.
> 
> >I'm afraid it might be tricky to bisect that, but it would be very helpful.
> 
>  That sounds like a separate one, but i don't have that and can't reproduce
> it on Kabini. I only have some known of those sometimes fails at random, but
> those are under "warn" and just few of them (i am talking about just 1-3
> tests), but no "fail" tests happens here at random.

Would you be able to set the environment variable R600_DEBUG=ps,vs and run the
glsl-fs-min test with the good and bad commit and post the output.

R600_DEBUG=ps,vs ./bin/shader_runner tests/shaders/glsl-fs-min-shader_test
-auto

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--- Comment #33 from smoki <smoki00790@gmail.com> ---

 glsl-fs-min is one of the random failing tests actually, it sometimes pass
sometimes fail with or without subreg liveness, so that is not problem here i
think.

 Currently i have 7 warns, 1 test which made gpu fault, 4 are crash/segfault
and 22 which random failing. 18 of those that random failing (mostly on second
piglit run) are EXT_transform_feedback/xyz tests, 4 on some glsl tests, etc...

 In whole that is 34 potentionaly problematic tests, with all those excluded
from run, this is what i get - 136 tests which fail with subreg liveness
enabled:

 https://dl.dropboxusercontent.com/u/74553632/compare2.tar.bz2

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--- Comment #34 from Michel Dänzer <michel@daenzer.net> ---
(In reply to smoki from comment #33)
>  glsl-fs-min is one of the random failing tests actually, it sometimes pass
> sometimes fail with or without subreg liveness, so that is not problem here
> i think.

I can't reproduce random failures with glsl-fs-min nor any piglit regressions
with sub-register liveness enabled, but sub-register liveness doesn't seem to
result in any code difference for glsl-fs-min anyway.


Can you find another test which consistently passes without sub-register
liveness and fails with it *and* shows a difference between them in the
R600_DEBUG=vs,ps stderr output, and attach the latter for both cases?

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--- Comment #35 from smoki <smoki00790@gmail.com> ---
Created attachment 113809
  --> https://bugs.freedesktop.org/attachment.cgi?id=113809&action=edit
subreg_disabled.txt

 (In reply to Michel Dänzer from comment #34)
> 
> I can't reproduce random failures with glsl-fs-min nor any piglit
> regressions with sub-register liveness enabled, but sub-register liveness
> doesn't seem to result in any code difference for glsl-fs-min anyway.
> 

 I can't too if i run it alone, so there is no difference, it just fail
sometimes in full piglit run.

> 
> Can you find another test which consistently passes without sub-register
> liveness and fails with it *and* shows a difference between them in the
> R600_DEBUG=vs,ps stderr output, and attach the latter for both cases?

 As i said yesterday comment 33 i trimmed down only ones which shows this
regression, you can pick any of those 136 test which shows difference. Let say:

 R600_DEBUG=vs,ps ./bin/copy-pixels -samples=8 -auto

 Outputs attached, first without...

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--- Comment #36 from smoki <smoki00790@gmail.com> ---
Created attachment 113810
  --> https://bugs.freedesktop.org/attachment.cgi?id=113810&action=edit
subreg_enabled.txt


...second with subreg liveness enabled.

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #37 from Tom Stellard <tstellar@gmail.com> ---
After examining the shader dumps one thing that looks suspicious to me is that
in the good dump, we have several instructions like this:

image_load v[9:12], 15, 0, 0, 0, 0, 0, 0, 0, v[4:7], s[8:15]

But nothing is ever written to the last component of vaddr: v7

However, in the bad dumps we have:

image_load v[8:11], 15, 0, 0, 0, 0, 0, 0, 0, v[1:4], s[8:15]

And a value is stored in the last component of vaddr: v4 before every image
load.

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

--- Comment #38 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 113825
  --> https://bugs.freedesktop.org/attachment.cgi?id=113825&action=edit
Possible fix

Can you try this patch and see if it helps?

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--- Comment #39 from smoki <smoki00790@gmail.com> ---
Created attachment 113826
  --> https://bugs.freedesktop.org/attachment.cgi?id=113826&action=edit
subreg_enabled2.txt

(In reply to Tom Stellard from comment #38)
> Created attachment 113825 [details] [review]
> Possible fix
> 
> Can you try this patch and see if it helps?

 Still fail, as dump is now very different i attached it.

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--- Comment #40 from Tom Stellard <tstellar@gmail.com> ---
There have been a few register allocator bugs fixed in LLVM recently, can you
re-apply the "Patch to re-enable subreg liveness" to latest LLVM and test
again?

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--- Comment #41 from smoki <smoki00790@gmail.com> ---
 Tried svn232842 with subreg liveness enabled + mesa    
a04b520890c669ce012b4b18165392dcabe0b27b

 Nothing, still same bugs are there.

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--- Comment #42 from Tom Stellard <tstellar@gmail.com> ---
(In reply to smoki from comment #41)
>  Tried svn232842 with subreg liveness enabled + mesa 
> a04b520890c669ce012b4b18165392dcabe0b27b
> 
>  Nothing, still same bugs are there.

I can't reproduce any of these failures on my Verde card.  What is still
failing for you? Piglit tests?  If you still see corruption in Unigine Valley,
can you post the command you use to launch the program and which scene the
corruption occurs in?

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--- Comment #43 from smoki <smoki00790@gmail.com> ---
Created attachment 114561
  --> https://bugs.freedesktop.org/attachment.cgi?id=114561&action=edit
hof.png


 Yes, those piglit tests from comment 33 still failing. But also Unigine Valley
still have corruptions, i run it via 'valey' script then apply some setings via
interface. Squares happens regradles of settings on scenes 1, 2, 3 and 6. On 2
and 3 there is not only black squrares, but fog also starts to not render
correctly on some/far camera positions.

 And also Stacking game from comment 24 have same borked rendering. Game Hands
of Fate also show rendering issues (screenshot attached)... and so on, many
apps are affected once i enable subreg liveness.

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--- Comment #44 from Tom Stellard <tstellar@gmail.com> ---
(In reply to smoki from comment #43)
> Created attachment 114561 [details]
> hof.png
> 
> 
>  Yes, those piglit tests from comment 33 still failing. But also Unigine
> Valley still have corruptions, i run it via 'valey' script then apply some
> setings via interface. Squares happens regradles of settings on scenes 1, 2,
> 3 and 6. On 2 and 3 there is not only black squrares, but fog also starts to
> not render correctly on some/far camera positions.
> 

Can you try running the piglit tests with no X server and with the environment
variable PIGLIT_PLATFORM=gbm You will need to install waffle from git and
enable gbm support and then rebuild piglit for this to work.

-Tom

>  And also Stacking game from comment 24 have same borked rendering. Game
> Hands of Fate also show rendering issues (screenshot attached)... and so on,
> many apps are affected once i enable subreg liveness.

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--- Comment #45 from smoki <smoki00790@gmail.com> ---
 If you ask does same tests fail there, then yes - same tests fail with
PIGLIT_PLATFORM=gbm with no xserver. And dump is the same with our example.

  PIGLIT_PLATFORM=gbm R600_DEBUG=vs,ps ./bin/copy-pixels -samples=8 -auto

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--- Comment #46 from smoki <smoki00790@gmail.com> ---
 Ah, i forgot to add that comparison anyway... That is no X gbm piglit, just
enabled/disabled subreg liveness:

 https://dl.dropboxusercontent.com/u/74553632/compare11.tar.bz2

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--- Comment #47 from Tom Stellard <tstellar@gmail.com> ---
If you enable sub-reg liveness in this branch:
http://cgit.freedesktop.org/~tstellar/llvm/log/?h=sched-perf-Mar-27-2015, do
you still see the bugs?

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--- Comment #48 from smoki <smoki00790@gmail.com> ---
(In reply to Tom Stellard from comment #47)
> If you enable sub-reg liveness in this branch:
> http://cgit.freedesktop.org/~tstellar/llvm/log/?h=sched-perf-Mar-27-2015, do
> you still see the bugs?

 In unigine valley there is not corruption with that anymore, perf goes down by
5% just to mention...

 But all other bugs are still there like corruptions in Stacking and Hands of
Fate games and all same piglit tests still fail.

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[Bug 89034] Firefox crashing xserver and some major rendering bugs

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

smoki <smoki00790@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #49 from smoki <smoki00790@gmail.com> ---

 Issue fixed in llvm:

  R600/SI: Fix bug with v_interp_p1_f32 instructions on 16 bank lds chips

  The src and dst register cannot be the same on chips with 16 lds banks.

 Closing.

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