[Bug 31246] New: Reproducible hangs on piglit tests with 5850

[Bug 31246] New: Reproducible hangs on piglit tests with 5850

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=31246

           Summary: Reproducible hangs on piglit tests with 5850
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/R600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: temp9476-freedesktop@yahoo.no


Ignoring the occasional random hang, I have found that the following tests
create a lockup of the system every time:

glsl-fs-main-return
glsl-vs-main-return
glsl-max-varyings
glsl-fs-vec4-indexing-temp-dst-in-nested-loop-combined
glsl-vs-vec4-indexing-temp-dst-in-nested-loop-combined

How would I go about debugging these further? It would be very nice if the
piglit tests would at least fail, not hang...

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[Bug 31246] Reproducible hangs on piglit tests with 5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

--- Comment #1 from Ian Romanick <idr@freedesktop.org> 2010-11-02 10:28:39 PDT ---
There was a time when the i965 driver would also hang in at least some of these
tests.  You might look at how Eric solved it there.  Search the GIT log for
those test names.

In all of these cases the problem is that the driver emitted some sequence of
instructions that made the GPU angry.  For example, I'll bet that the GPU
doesn't like a return instruction that doesn't have a preceding call
instruction.  We implemented a lowering pass to remove returns from main to fix
this very problem on i965 for glsl-[fv]s-main-return.

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[Bug 31246] Reproducible hangs on piglit tests with 5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

--- Comment #2 from Kjell Rune Skaaraas <temp9476-freedesktop@yahoo.no> 2010-11-06 12:44:17 PDT ---
To put it this way, I found the patches you referred to but they don't tell me
much. I did dig through the piglet code and found the definition of the test
though, it's in a bit of meta-code:

[require]
GL >= 2.0
GLSL >= 1.10

[vertex shader]
void main()
{
        gl_Position = gl_Vertex;
}

[fragment shader]
uniform int early;

void main()
{
        gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0);
        if (early != 0) /* always true */
                return;
        gl_FragColor = vec4(1.0, 0.0, 0.0, 0.0);
}

[test]
uniform int early 1
draw rect -1 -1 2 2
probe all rgba 0.0 1.0 0.0 0.0

----

So my next question is really how I can look at what GPU instructions the
driver *would* create for these shaders, without actually running the shaders.
I tried catching that with RADEON_DEBUG=all but that just gives me a zero byte
file after reboot so it's no good.

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[Bug 31246] Reproducible hangs on piglit tests with 5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

--- Comment #3 from Kjell Rune Skaaraas <temp9476-freedesktop@yahoo.no> 2010-11-07 05:13:59 PST ---
So... http://www.mesa3d.org/shading.html says there should be a standalone
compiler in src/mesa/drivers/glslcompiler that should tell me what the compiled
output is. There's just one little problem, I don't have that directory at all.
Moved? Gone? And what replaced it?

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[Bug 31246] [RADEON::CYPRESS:R600C] reproducible hangs on piglit tests with HD5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

Jerome Glisse <glisse@freedesktop.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Reproducible hangs on       |[RADEON::CYPRESS:R600C]
                   |piglit tests with 5850      |reproducible hangs on
                   |                            |piglit tests with HD5850

--- Comment #4 from Jerome Glisse <glisse@freedesktop.org> 2011-02-09 07:52:42 PST ---
Do you still have issue with lastest r600c or r600g ?

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[Bug 31246] [RADEON::CYPRESS:R600C] reproducible hangs on piglit tests with HD5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

--- Comment #5 from Wyatt Epp <wyatt.epp@gmail.com> 2011-02-22 09:01:57 PST ---
(In reply to comment #4)
> Do you still have issue with lastest r600c or r600g ?

Just happened about an hour ago for me on
glsl-vs-vec4-indexing-temp-dst-in-nested-loop-combined.

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[Bug 31246] [RADEON::CYPRESS:R600C] reproducible hangs on piglit tests with HD5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

Sven Arvidsson <sa@whiz.se> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |sa@whiz.se

--- Comment #6 from Sven Arvidsson <sa@whiz.se> 2011-06-01 10:26:25 PDT ---
On my Evergreen, glsl-vs-vec4-indexing-temp-dst-in-nested-loop-combined seems
to be the only remaining test causing a GPU hang.

System environment:
-- system architecture: 32-bit
-- Linux distribution: Debian unstable
-- GPU: REDWOOD
-- Model: XFX Radeon HD 5670 1GB
-- Display connector: DVI
-- xf86-video-ati: 6.14.2
-- xserver: 1.10.1
-- mesa: git-c5903ed
-- drm: 2.4.25
-- kernel: 2.6.39

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[Bug 31246] [RADEON::CYPRESS:R600C] reproducible hangs on piglit tests with HD5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

--- Comment #7 from Sven Arvidsson <sa@whiz.se> 2011-06-01 14:22:59 PDT ---
It looks like this was fixed, but only for r700 in r600c:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=c20778e76f1203063977337ebbe1bd2aacef5dc0

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[Bug 31246] [RADEON::CYPRESS:R600C] reproducible hangs on piglit tests with HD5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

--- Comment #8 from Sven Arvidsson <sa@whiz.se> 2011-06-11 09:20:27 PDT ---
The hang with glsl-vs-vec4-indexing-temp-dst-in-nested-loop-combined has been
fixed for r600g now :)

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[Bug 31246] [RADEON::CYPRESS:R600C] reproducible hangs on piglit tests with HD5850

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https://bugs.freedesktop.org/show_bug.cgi?id=31246

Andreas Boll <andreas.boll.dev@gmail.com> changed:

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

--- Comment #9 from Andreas Boll <andreas.boll.dev@gmail.com> 2012-09-12 15:02:14 UTC ---
(In reply to comment #8)
> The hang with glsl-vs-vec4-indexing-temp-dst-in-nested-loop-combined has been
> fixed for r600g now :)

Closing.

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