[Bug 64600] New: r600g pyrit OpenCL issue on HD6850

[Bug 64600] New: r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

          Priority: medium
            Bug ID: 64600
          Assignee: dri-devel@lists.freedesktop.org
           Summary: r600g pyrit OpenCL issue on HD6850
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: spamjunkeater@gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r600
           Product: Mesa

Using openSuSE 12.3 with 3.9.2 kernel, mesa-trunk and llvm-trunk.
Pyrit generates this output on radeon HD6850.


> pyrit benchmark
Pyrit 0.4.1-dev (svn r308) (C) 2008-2011 Lukas Lueg http://pyrit.googlecode.com
This code is distributed under the GNU General Public License v3+

Calibrating... LLVM ERROR: Not supported instr: <MCInst 206 <MCOperand
Reg:1046> <MCOperand Reg:1031> <MCOperand Imm:0> <MCOperand Imm:0>>



Detailed debug log is here:
https://bugs.freedesktop.org/attachment.cgi?id=78839

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #1 from Tom Stellard <tstellar@gmail.com> ---
This patch should fix the error:
http://lists.freedesktop.org/archives/mesa-dev/2013-May/039375.html however
there is still another bug that causes pyrit to hang, even with this patch.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #2 from darkbasic <darkbasic@linuxsystems.it> ---
Any news? With latest stack and HD 7950 I get

~ $ pyrit benchmark
Pyrit 0.4.0 (C) 2008-2011 Lukas Lueg http://pyrit.googlecode.com
This code is distributed under the GNU General Public License v3+

Calibrating... 0x7f981cb8b690: i64 = ExternalSymbol'__muldi3'
Stack dump:
0.      Running pass 'Function Pass Manager' on module 'radeon'.
1.      Running pass 'AMDGPU DAG->DAG Pattern Instruction Selection' on
function '@opencl_pmk_kernel'
Errore di segmentazione

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #3 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
My HD6850 is stalls at Calibrating...




death@triQuad:/home/compile/svn/pyrit_svn> pyrit benchmark
Pyrit 0.4.1-dev (svn r308) (C) 2008-2011 Lukas Lueg http://pyrit.googlecode.com
This code is distributed under the GNU General Public License v3+

Calibrating...

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #4 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 86005
  --> https://bugs.freedesktop.org/attachment.cgi?id=86005&action=edit
Possible Fix

Can you try this patch, and if it doesn't work post the output of
R600_DEBUG=cs.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #5 from darkbasic <darkbasic@linuxsystems.it> ---
It hangs at calibrating now:

~ $ R600_DEBUG=cs pyrit benchmark
Pyrit 0.4.0 (C) 2008-2011 Lukas Lueg http://pyrit.googlecode.com
This code is distributed under the GNU General Public License v3+

Calibrating... ^CTerminato

Where should I find the output of R600_DEBUG=cs? There is nothing even in
dmesg.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #6 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #5)
> It hangs at calibrating now:
> 
> ~ $ R600_DEBUG=cs pyrit benchmark
> Pyrit 0.4.0 (C) 2008-2011 Lukas Lueg http://pyrit.googlecode.com
> This code is distributed under the GNU General Public License v3+
> 
> Calibrating... ^CTerminato
> 
> Where should I find the output of R600_DEBUG=cs? There is nothing even in
> dmesg.

This bug was filed against Evergreen/NI GPUs.  If you are using SI, you will
need to use RADEON_DUMP_SHADERS=1

Otherwise, R600_DEBUG=cs will print output to stderr.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #7 from darkbasic <darkbasic@linuxsystems.it> ---
Created attachment 86011
  --> https://bugs.freedesktop.org/attachment.cgi?id=86011&action=edit
pyrit debug

Here it is, thanks.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #8 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #7)
> Created attachment 86011 [details]
> pyrit debug
> 
> Here it is, thanks.

There are no compute shaders in this output.  You should let the program run
longer, if possible, to give it time to dump all the output.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #9 from darkbasic <darkbasic@linuxsystems.it> ---
Created attachment 86014
  --> https://bugs.freedesktop.org/attachment.cgi?id=86014&action=edit
pyrit debug 10 minutes

I let it run for 10 minutes and still no compute shaders.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #10 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
Created attachment 86118
  --> https://bugs.freedesktop.org/attachment.cgi?id=86118&action=edit
Debug output

I am attaching debug output generated with
R600_DEBUG=cs pyrit benchmark 2> debug.txt

without the patch (attachment 86005).

With the latest proposed patch, there are no output on debug.
Just stalling. Don't know why.
Thanks.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #11 from darkbasic <darkbasic@linuxsystems.it> ---
Created attachment 86166
  --> https://bugs.freedesktop.org/attachment.cgi?id=86166&action=edit
debug radeonsi nopatch

I here my

RADEON_DUMP_SHADERS=1 pyrit benchmark 2> debug.txt

with radeonsi (HD 7950) without the patch.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #12 from Tom Stellard <tstellar@gmail.com> ---
These patches should fix the crash on Evergreen/NI GPUs:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20131007/190695.html

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #13 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #12)
> These patches should fix the crash on Evergreen/NI GPUs:
> http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20131007/190695.
> html

These patches won't apply to llvm master any more.  Here they are in a branch:

http://cgit.freedesktop.org/~tstellar/llvm/log/?h=r600-private-mem-fixes

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #14 from Peter Wu <lekensteyn@gmail.com> ---
Created attachment 87536
  --> https://bugs.freedesktop.org/attachment.cgi?id=87536&action=edit
piglit test kernel with pyrit

The patches did avoid the crash, but the results are still invalid.

For convenience, I have added some test vectors and glue to the pyrit kernel. I
don't know if such a complex testcase is acceptable for piglit, hence I am
posting it here. Let me know if such a case is suitable for piglit and if it
should be posted to the piglit list too.

The test passes with the POCL implementation but not with the R600 one.

Without the patches the output is:
## Test: Pyrit WPA2-PSK accelerator
(/src/piglit/tests/cl/program/program-tester.c) ##

# Running on:
#   Platform: Default
#   Device: AMD BARTS
#   OpenCL version: 1.1
#   OpenCL C version: 1.1
#   Build options:  -cl-std=CL1.1
Program has been built successfully
> Running kernel test: 
Using kernel opencl_pmk_kernel
Setting kernel arguments...
Running the kernel...
cl-program-tester: /src/llvm/include/llvm/MC/MCRegisterInfo.h:65: unsigned int
llvm::MCRegisterClass::getRegister(unsigned int) const: Assertion `i <
getNumRegs() && "Register number out of range!"' failed.
Stack dump:
0.      Running pass 'Function Pass Manager' on module 'radeon'.
1.      Running pass 'R600 Handle indirect addressing' on function
'@opencl_pmk_kernel'
Aborted (core dumped)

With branch tsellar/r600-private-mem-fixes, up to commit cf5d9a2:
[..]
Running the kernel...
Validating results...
Expecting 3201012614 (0xbecb9386) with tolerance 0, but got 844928435
(0x325c95b3)
Error at uint[0]
 Argument 1: FAIL
PIGLIT:subtest {'' : 'fail'}
>> Some or all of the tests FAILED
# Result:
PIGLIT: {'result': 'fail' }

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #15 from Peter Wu <lekensteyn@gmail.com> ---
Created attachment 87607
  --> https://bugs.freedesktop.org/attachment.cgi?id=87607&action=edit
Piglit: test copying a struct (with at least three fields)

This is a smaller test case that highlights one specific issue: copying
structures (consisting of at least three integers) fails.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #16 from Peter Wu <lekensteyn@gmail.com> ---
Created attachment 87609
  --> https://bugs.freedesktop.org/attachment.cgi?id=87609&action=edit
R600_DEBUG=cs cl-program-tester struct-copy.cl

The parameter tests passes when the struct contains one member, but the struct
assignment still fails. Attached is the shader debug output for the original
test case.

LLVM: r600-private-mem-fixes rebased on master
(01436ba3066b99547c1138edf5c36ef2ad467e71, SVN rev 192587)
Mesa: git snb-magic-18531-ge6c2afa

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #17 from Tom Stellard <tstellar@gmail.com> ---
Thanks for adding the tests.  It would be great if you could send these as
patches to piglit@lists.freedesktop.org, so we can add them to the test suite.

This patch should fix the struct copy tests:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20131014/191163.html

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #18 from Peter Wu <lekensteyn@gmail.com> ---
Created attachment 87706
  --> https://bugs.freedesktop.org/attachment.cgi?id=87706&action=edit
piglit test (messy, with comments) that fails on R600

I'll await the feedback in your thread before submitting it to piglit.

So the struct bug is fixed, yet I encountered another issue that seems to be
related to alignment. Please find attached piglit test, it fails on R600 but
passes with POCL and a C wrapper.

The Pyrit kernel has been stripped, only the sha1_process function remains
(with one macro expanded and every macro thereafter undef'd). See the comments
in the test.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #19 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #18)
> Created attachment 87706 [details]
> piglit test (messy, with comments) that fails on R600
> 
> I'll await the feedback in your thread before submitting it to piglit.
> 
> So the struct bug is fixed, yet I encountered another issue that seems to be
> related to alignment. Please find attached piglit test, it fails on R600 but
> passes with POCL and a C wrapper.
> 
> The Pyrit kernel has been stripped, only the sha1_process function remains
> (with one macro expanded and every macro thereafter undef'd). See the
> comments in the test.

I have a lot of patches that are on the mailing list waiting for review.  Here
is a branch containing all of these patches:
http://cgit.freedesktop.org/~tstellar/llvm/log/?h=master-testing I will try to
keep this branch updated as I submit more patches.  The sha-process test you
posted passes for me with this branch.

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

--- Comment #20 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 87757
  --> https://bugs.freedesktop.org/attachment.cgi?id=87757&action=edit
Additional Bug fix  - Apply to my master-testing branch

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[Bug 64600] r600g pyrit OpenCL issue on HD6850

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https://bugs.freedesktop.org/show_bug.cgi?id=64600

Peter Wu <lekensteyn@gmail.com> changed:

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

--- Comment #21 from Peter Wu <lekensteyn@gmail.com> ---
Works now with the latest mesa and llvm. If the performance is still bad, you
are probably affected by a bad workgroup size. In that case, try Tom's
pyrit-perfs[1][2] patches on top of ac81b6f2be8779022e8641984b09118b57263128.

The second patch[2] is already upstreamed, but patch [1] does not apply on the
current master because of other changes in the area.

 [1]:
http://people.freedesktop.org/~tstellar/pyrit-perf/0001-XXX-clover-Calculate-the-optimal-work-group-size.patch
 [2]:
http://people.freedesktop.org/~tstellar/pyrit-perf/0001-radeon-llvm-Specify-the-DataLayout-when-running-opti.patch

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