[Bug 64201] New: OpenCL usage result segmentation fault on r600g with HD6850.

[Bug 64201] New: OpenCL usage result segmentation fault on r600g with HD6850.

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

          Priority: medium
            Bug ID: 64201
          Assignee: dri-devel@lists.freedesktop.org
           Summary: OpenCL usage result segmentation fault on r600g with
                    HD6850.
          Severity: normal
    Classification: Unclassified
                OS: other
          Reporter: spamjunkeater@gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r600
           Product: Mesa

I am using OpenSUSE 12.3 x86_64 with 3.9 Kernel and ATI 6850HD GPU.

I just experiment OpenCL but I cannot make it with open source tools.

compiled llvm, clang with : ./configure --libdir=/usr/lib64 --prefix=/usr
--enable-{optimized,pic,shared} --disable-{assertions,docs,timestamps}
--enable-targets="x86_64" --enable-experimental-targets="R600"
(for llvm compilation, used http://llvm.org/docs/GettingStarted.html)

And after, compiled mesa-trunk with ./configure --with-gallium-drivers=r600
--prefix=/usr --libdir=/usr/lib64 --enable-{vdpau,texture-float}
--with-dri-drivers="" --enable-{gallium-llvm,r600-llvm-compiler,opencl}
--enable-glx-tls --enable-shared-{glapi,dricore}

but every utility that I tried, gives a segmentation error to me :-/


[ 3453.462803] python[7401]: segfault at 60 ip 00007f55c16292c0 sp
00007fff191b9138 error 4 in pipe_r600.so[7f55c14c0000+299000]
[ 3465.707476] pyrit[7529]: segfault at 0 ip 00007f53614fb7cb sp
00007f535f2bc5c0 error 6 in libLLVM-3.3svn.so[7f5360eb1000+1004000]
[ 3674.192257] cgminer[8773]: segfault at 20 ip 00007f2b65088710 sp
00007fffc1f24908 error 4 in libLLVM-3.3svn.so[7f2b648af000+1004000]


Most detailed report from pyrit, by using it with benchmark argument;

> 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... 0x7faf109a72e0: i32 = GlobalAddress<i32 (i32, i32, i32)*
@llvm.AMDGPU.bit.extract.u32.> 0
Undefined function
UNREACHABLE executed at
/run/media/death/OldRoot/temp/llvm/lib/Target/R600/AMDGPUISelLowering.h:56!
Stack dump:
0.    Running pass 'Function Pass Manager' on module 'radeon'.
1.    Running pass 'AMDGPU DAG->DAG Pattern Instruction Selection' on function
'@sha1_process'
Aborted

Regards,
Erdem

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

Erdem U. Altinyurt <spamjunkeater@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 OS|other                       |Linux (All)
           Severity|normal                      |critical

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

Erdem U. Altinyurt <spamjunkeater@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |blocker
                 CC|                            |spamjunkeater@gmail.com

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

--- Comment #1 from vincent <vljn@ovi.com> ---
Can you post the output with R600_DEBUG=cs env var set ?

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

--- Comment #2 from Tom Stellard <tstellar@gmail.com> ---
For pyrit it looks like we aren't handling one of the intrinsics produced by
the AMDILPeephole optimizer, but can you still post the output with the
RADEON_DEBUG=cs env variable set.

Do you have a link to where can I download this program?

Also, what other programs didn't work for you?

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

--- Comment #3 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 78831
  --> https://bugs.freedesktop.org/attachment.cgi?id=78831&action=edit
Possible fix

This patch should fix the error you were seeing with pyrit.  However, it's
possible you will now see a different error.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

--- Comment #4 from Erdem U. Altinyurt <spamjunkeater@gmail.com> ---
Hi friends,

@Vincent, I will add output as an attachment.

@Tom Stellard

For pyrit : svn checkout http://pyrit.googlecode.com/svn/trunk/ pyrit-read-only

I don't patched it. Will report with your patch asap.

Other programs are cgminer : https://github.com/ckolivas/cgminer

And python-opencl package from suse repo that give  pipe_r600.so fault.

Any other program that I trued doesn't work on my card, yet.

Thanks.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

--- Comment #5 from Erdem U. Altinyurt <spamjunkeater@gmail.com> ---
Created attachment 78838
  --> https://bugs.freedesktop.org/attachment.cgi?id=78838&action=edit
Pyrit Error log with Debug

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

--- Comment #6 from Erdem U. Altinyurt <spamjunkeater@gmail.com> ---
Created attachment 78839
  --> https://bugs.freedesktop.org/attachment.cgi?id=78839&action=edit
Pyrit Debug log with Patched LLVM-trunk

Hi again,
I attached debug log with patch for examination.
Regards,
Erdem

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

--- Comment #7 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #4)
> Hi friends,
> 
> @Vincent, I will add output as an attachment.
> 
> @Tom Stellard
> 
> For pyrit : svn checkout http://pyrit.googlecode.com/svn/trunk/
> pyrit-read-only
> 
> I don't patched it. Will report with your patch asap.
> 
> Other programs are cgminer : https://github.com/ckolivas/cgminer
> 

I would recommend using bfgminer for bitcoin mining.  It auto-detects the mesa
platform, and disabled unsupported features.  All you need to do to get it to
work is pass the -v1 flag.

> And python-opencl package from suse repo that give  pipe_r600.so fault.
> 

Can you open a separate bug for this or any other programs you've tried.

> Any other program that I trued doesn't work on my card, yet.



> 
> Thanks.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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https://bugs.freedesktop.org/show_bug.cgi?id=64201

--- Comment #8 from Erdem U. Altinyurt <spamjunkeater@gmail.com> ---
(In reply to comment #7)
> I would recommend using bfgminer for bitcoin mining.  It auto-detects the
> mesa platform, and disabled unsupported features.  All you need to do to get
> it to work is pass the -v1 flag.

I just want try openCL programs. Not intended to waste energy with those yet,
until I produce my energy by solar panels...

With "bfgminer -v1 --benchmark", I think it start working first. But hey! I got
GPU lockups which is serious bug I think! :-/
I attached the kernel messages.

Anyway I got 1.6M hash/s.


Also "bfgminer -v1 --benchmark --scrypt" gives segmentation fault.
Attaching the debug output with R600_cs=DEBUG.



> > And python-opencl package from suse repo that give  pipe_r600.so fault.
> Can you open a separate bug for this or any other programs you've tried.
ACK

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #9 from Erdem U. Altinyurt <spamjunkeater@gmail.com> ---
Created attachment 78868
  --> https://bugs.freedesktop.org/attachment.cgi?id=78868&action=edit
GPU Lockup with bfgminer -v1 --benchmark kernel messages

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #10 from Erdem U. Altinyurt <spamjunkeater@gmail.com> ---
Also faced same lockups at GIMP OpenCL, otherwise it looks start working,
slowwwwly. :)
If bfgminer fix doesn't fix GIMP also, I will open bug report for it also.
Thanks.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #11 from Aaron Watry <awatry@gmail.com> ---
If you're experiencing GPU lockups w/ OpenCL, I'd recommend making sure that
you mesa includes:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=4539f8e20af286d1f521eb016c89c6d9af0b801c

This fixed a lot of common CL-based lockups on my Radeon 6850.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #12 from Erdem U. Altinyurt <spamjunkeater@gmail.com> ---
(In reply to comment #11)
> If you're experiencing GPU lockups w/ OpenCL, I'd recommend making sure that
> you mesa includes:
> http://cgit.freedesktop.org/mesa/mesa/commit/
> ?id=4539f8e20af286d1f521eb016c89c6d9af0b801c
> 
> This fixed a lot of common CL-based lockups on my Radeon 6850.

Nope, I am using mesa-trunk that  includes this patch also, but it looks
doesn't help much...

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #13 from Erdem U. Altinyurt <spamjunkeater@gmail.com> ---
Oops! LLVM 3.3 is branched today.
I wish this bug vanished from LLVM before release of v3.3 in June

Updated today's mesa and llvm-trunks...
Without "-v1" flag, "bfgminer --benchmark" reports:

[2013-05-08 03:37:54] Error -11: Building Program (clBuildProgram)
[2013-05-08 03:37:54] input.cl:197:7: error: initializing 'uint' (aka 'unsigned
int') with an expression of incompatible type 'unsigned int
__attribute__((ext_ve
ctor_type(2)))'
        uint r = rot(W[3].x,25u)^rot(W[3].x,14u)^((W[3].x)>>3U);



@Aaron, could you use pyrit or any other OpenCL tools with yours HD6850 without
lockup?
Regards.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #14 from Aaron Watry <awatry@gmail.com> ---
> @Aaron, could you use pyrit or any other OpenCL tools with yours HD6850
> without lockup?

I get the same error from pyrit (cpyrit-opencl) as you do:

> awatry@veer:~/src/opencl_applications/cpyrit-opencl-0.4.0$ 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... LLVM ERROR: Not supported instr: <MCInst 206 <MCOperand Reg:1046> <MCOperand Reg:1031> <MCOperand Imm:0> <MCOperand Imm:0>>

I'm not sure right now what instruction is causing that error.

I do get lockups when I run:
bfgminer -v1 --benchmark

Kernel:
http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-next/2013-05-03-raring/
Mesa: git master as of yesterday
LLVM: git master as of a70d02ff284, with a few additional patches on top
drm: git master 040f6b015ef7d9c

A simpler test case might be the piglit min() builtin CL test.  Does that test
lock up for you as well?  You might have to run it a few times.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #15 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #8)
> (In reply to comment #7)
> > I would recommend using bfgminer for bitcoin mining.  It auto-detects the
> > mesa platform, and disabled unsupported features.  All you need to do to get
> > it to work is pass the -v1 flag.
> 
> I just want try openCL programs. Not intended to waste energy with those
> yet, until I produce my energy by solar panels...
> 
> With "bfgminer -v1 --benchmark", I think it start working first. But hey! I
> got GPU lockups which is serious bug I think! :-/
> I attached the kernel messages.
> 

I'm not sure that benchmark mode works for bfgminer.  Can you try without
--benchmark

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #16 from Aaron Watry <awatry@gmail.com> ---
> I'm not sure that benchmark mode works for bfgminer.  Can you try without
> --benchmark

I just signed up with a pool and tried:
bfgminer -v1 -o [super_secret] -u [even_more_secret] -p [hi!!!]

About 20-30 seconds after the bfgminer UI showed up I got a lock (and the GPU
didn't reset after 10+ seconds).

I'm trying to find an older kernel which will still work on my machine to test
against...

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--- Comment #17 from Aaron Watry <awatry@gmail.com> ---
I can at least confirm that the lock-ups also happen on a CEDAR (HD 5400) with
the 3.9.0 kernel and latest drm/llvm/mesa master.  This machine at least
doesn't hard lock (GPU resets after 10 seconds...), so I'll attach the results
of:

R600_DEBUG=trace_cs,nodma bfgminer -v1

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #18 from Aaron Watry <awatry@gmail.com> ---
Created attachment 79106
  --> https://bugs.freedesktop.org/attachment.cgi?id=79106&action=edit
Output of R600_DEBUG=trace_cs,nodma for bfgminer after lockup

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--- Comment #19 from Aaron Watry <awatry@gmail.com> ---
Created attachment 79107
  --> https://bugs.freedesktop.org/attachment.cgi?id=79107&action=edit
dmesg lines that correspond to cs trace in previous attachment

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--- Comment #20 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #17)
> I can at least confirm that the lock-ups also happen on a CEDAR (HD 5400)
> with the 3.9.0 kernel and latest drm/llvm/mesa master.  This machine at
> least doesn't hard lock (GPU resets after 10 seconds...), so I'll attach the
> results of:
> 
> R600_DEBUG=trace_cs,nodma bfgminer -v1

One thing you may want to check is that Mesa is picking up the correct LLVM
shared object.  The LLVM version was just bumped and the current shared object
is now called libLLVM-3.4svn.so.  I just ran into this problem myself.

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--- Comment #21 from Alex Deucher <agd5f@yahoo.com> ---
Created attachment 79110
  --> https://bugs.freedesktop.org/attachment.cgi?id=79110&action=edit
flush testing

I suspect there may still be issues with flushing.  You might try playing with
that.  This patch has some possibilities to try.  Ideally we'd use the
SURFACE_SYNC stuff rather than the FLUSH_AND_INV events on evergreen+.

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--- Comment #22 from Aaron Watry <awatry@gmail.com> ---
I've gone back to kernel 3.6.11 and still get GPU locks when running this
program (and the min() CL builtin in piglit).

I'm leaning towards the issue being in mesa, which I'll have a much easier time
bisecting than kernel changes.

Tom, I've also verified that the LLVM .so version is correct (after deleting
the old one and rebuilding mesa).

I've tried Alex's patch as is, and also when swapping in the commented line in
evergreen_compute.c...  It still locks, but we'll see if I can bisect to find a
culprit.

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--- Comment #23 from Tom Stellard <tstellar@gmail.com> ---
The pyrit failure should be a separate bug.  The failure is caused by the lack
of proper private address space support.  This same issues also affects a few
of the GEGL filters.  New bugs should be opened for pyrit and GEGL.  Let's keep
the focus of this bug on hangs in bfgminer.

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--- Comment #24 from Aaron Watry <awatry@gmail.com> ---
I haven't managed to finish bisecting this yet, but I believe that this bug has
been present since at least January 9th, 2013:

mesa:  4f2d9a8f520cda
llvm:  1db9b6957c
clang: 50767d8c8f2f667255bd

libclc was latest from my git repo on fd.o, with the following commits reverted
to make it build against older llvm:
f617f2dfa68
1114e99b296

I'll keep going in trying to nail down the commit that this broke in, although
I'll soon be back into having to build Tom's llvm tree to get the AMDGPU
back-end again.

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Olivier Langlois <olivier@olivierlanglois.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |olivier@olivierlanglois.net

--- Comment #25 from Olivier Langlois <olivier@olivierlanglois.net> ---
Hi,

I have a segfault when running bfgminer. I have compiled llvm,libclc and mesa
yesterday from git/svn trunk.

The core seems to happen when llvm compiles the cl program. So the crash
happens before anything gets executed on the GPU. Maybe llvm is compiling
differently depending on the target.

I am currently rebuilding debug build of llvm to have more info but in the
meantime, just in case that you would recognize something you've seen often:

Program terminated with signal 11, Segmentation fault.
#0  0x00007f090591a5e5 in llvm::Linker::linkInModule(llvm::Module*, unsigned
int, std::string*) () from /usr/lib/llvm/libLLVM-3.4svn.so
(gdb) where
#0  0x00007f090591a5e5 in llvm::Linker::linkInModule(llvm::Module*, unsigned
int, std::string*) () from /usr/lib/llvm/libLLVM-3.4svn.so
#1  0x00007f090591ccaf in llvm::Linker::LinkModules(llvm::Module*,
llvm::Module*, unsigned int, std::string*) ()
   from /usr/lib/llvm/libLLVM-3.4svn.so
#2  0x00007f09070fbecc in clover::compile_program_llvm(clover::compat::string
const&, pipe_shader_ir, clover::compat::string const&, clover::compat::string
const&) () from /usr/lib/libOpenCL.so
#3  0x00007f09070deb19 in _cl_program::build(std::vector<_cl_device_id*,
std::allocator<_cl_device_id*> > const&, char const*) ()
   from /usr/lib/libOpenCL.so
#4  0x00007f09070efa70 in clBuildProgram () from /usr/lib/libOpenCL.so
#5  0x000000000043ac60 in ?? ()
#6  0x0000000000436d1d in ?? ()
#7  0x0000000000406af3 in ?? ()
#8  0x00007f0908b92a15 in __libc_start_main () from /usr/lib/libc.so.6
#9  0x0000000000408175 in ?? ()

marie-eve@Kimper /usr/lib $ bfgminer -n
 [2013-05-24 11:59:21] CL Platform 0 vendor: Mesa                    
 [2013-05-24 11:59:21] CL Platform 0 name: Default                    
 [2013-05-24 11:59:21] CL Platform 0 version: OpenCL 1.1 MESA 9.2.0             
 [2013-05-24 11:59:21] Platform 0 devices: 1                    
 [2013-05-24 11:59:21]     0    AMD RS780                    
 [2013-05-24 11:59:21] Unable to load ati adl library                    
 [2013-05-24 11:59:21] 1 GPU devices max detected

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #26 from Tom Stellard <tstellar@gmail.com> ---
> 
> marie-eve@Kimper /usr/lib $ bfgminer -n
>  [2013-05-24 11:59:21] CL Platform 0 vendor: Mesa                    
>  [2013-05-24 11:59:21] CL Platform 0 name: Default                    
>  [2013-05-24 11:59:21] CL Platform 0 version: OpenCL 1.1 MESA 9.2.0         
> 
>  [2013-05-24 11:59:21] Platform 0 devices: 1                    
>  [2013-05-24 11:59:21] 	0	AMD RS780                    

Sorry, OpenCL is not supported for RS780.

>  [2013-05-24 11:59:21] Unable to load ati adl library                    
>  [2013-05-24 11:59:21] 1 GPU devices max detected

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--- Comment #27 from Olivier Langlois <olivier@olivierlanglois.net> ---
(In reply to comment #26)
> > 
> > marie-eve@Kimper /usr/lib $ bfgminer -n
> >  [2013-05-24 11:59:21] CL Platform 0 vendor: Mesa                    
> >  [2013-05-24 11:59:21] CL Platform 0 name: Default                    
> >  [2013-05-24 11:59:21] CL Platform 0 version: OpenCL 1.1 MESA 9.2.0         
> > 
> >  [2013-05-24 11:59:21] Platform 0 devices: 1                    
> >  [2013-05-24 11:59:21] 	0	AMD RS780                    
> 
> Sorry, OpenCL is not supported for RS780.
> 
Ok. I'm a bit surprise given that this GPU is in the R600 row at:

http://www.x.org/wiki/RadeonFeature#Decoder_ring_for_engineering_vs_marketing_names

I'll stop my effort to investigate this problem then.

Thank you for your prompt reply.

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--- Comment #28 from Olivier Langlois <olivier@olivierlanglois.net> ---
if this can help:

llvm::Linker::SrcM is NULL

(gdb) where
#0  _M_data (this=0x90) at /usr/include/c++/4.8.0/bits/basic_string.h:293
#1  _M_rep (this=0x90) at /usr/include/c++/4.8.0/bits/basic_string.h:301
#2  size (this=0x90) at /usr/include/c++/4.8.0/bits/basic_string.h:716
#3  empty (this=0x90) at /usr/include/c++/4.8.0/bits/basic_string.h:812
#4  run (this=0x7fffe1bd7e30) at LinkModules.cpp:1152
#5  llvm::Linker::linkInModule (this=this@entry=0x7fffe1bd8190,
Src=Src@entry=0x0, Mode=Mode@entry=0, 
    ErrorMsg=ErrorMsg@entry=0x7fffe1bd83c0) at LinkModules.cpp:1302
#6  0x00007f74fe1870ef in llvm::Linker::LinkModules (Dest=<optimized out>,
Src=0x0, Mode=0, 
    ErrorMsg=0x7fffe1bd83c0) at LinkModules.cpp:1322
#7  0x00007f74ff96eecc in clover::compile_program_llvm(clover::compat::string
const&, pipe_shader_ir, clover::compat::string const&, clover::compat::string
const&) () from /usr/lib/libOpenCL.so
#8  0x00007f74ff951b19 in _cl_program::build(std::vector<_cl_device_id*,
std::allocator<_cl_device_id*> > const&, char const*) () from
/usr/lib/libOpenCL.so
#9  0x00007f74ff962a70 in clBuildProgram () from /usr/lib/libOpenCL.so
#10 0x000000000043ac60 in ?? ()
#11 0x0000000000436d1d in ?? ()
#12 0x0000000000406af3 in ?? ()
#13 0x00007f7501405a15 in __libc_start_main () from /usr/lib/libc.so.6
#14 0x0000000000408175 in ?? ()
(gdb) up
#4  run (this=0x7fffe1bd7e30) at LinkModules.cpp:1152
1152      if (!SrcM->getDataLayout().empty() && !DstM->getDataLayout().empty()
&&
(gdb) p *this
$3 = {DstM = 0x23c7030, SrcM = 0x0, TypeMap = {<llvm::ValueMapTypeRemapper> = {
      _vptr.ValueMapTypeRemapper = 0x7f74fec64810 <vtable for (anonymous
namespace)::TypeMapTy+16>}, 
    MappedTypes = {<llvm::DenseMapBase<llvm::DenseMap<llvm::Type*, llvm::Type*,
llvm::DenseMapInfo<llvm::Type*> >, llvm::Type*, llvm::Type*,
llvm::DenseMapInfo<llvm::Type*> >> = {<No data fields>}, Buckets = 0x0, 
      NumEntries = 0, NumTombstones = 0, NumBuckets = 0}, 
    SpeculativeTypes = {<llvm::SmallVectorImpl<llvm::Type*>> =
{<llvm::SmallVectorTemplateBase<llvm::Type*, true>> =
{<llvm::SmallVectorTemplateCommon<llvm::Type*, void>> =
{<llvm::SmallVectorBase> = {
              BeginX = 0x7fffe1bd7e78, EndX = 0x7fffe1bd7e78, CapacityX =
0x7fffe1bd7ef8}, 
            FirstEl = {<llvm::AlignedCharArray<8ul, 8ul>> = {
                buffer = "P\346\061\002\000\000\000"}, <No data fields>}}, <No
data fields>}, <No data fields>}, Storage = {InlineElts =
{{<llvm::AlignedCharArray<8ul, 8ul>> = {
              buffer = "\001\000\000\000\000\000\000"}, <No data fields>},

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--- Comment #29 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
Error is still true.
Could you diagnose what the problem is?
Latest error message of bfgminer is:

EmitRawText called on an MCStreamer that doesn't support it,  something must
not be fully mc'ized
                                                                               
 Stack dump:
0.    Running pass 'Function Pass Manager' on module 'radeon'.
1.    Running pass 'AMDGPU Assembly Printer' on function '@search'
Aborted

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--- Comment #30 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #29)
> Error is still true.
> Could you diagnose what the problem is?
> Latest error message of bfgminer is:
> 
> EmitRawText called on an MCStreamer that doesn't support it,  something must
> not be fully mc'ized
>                                                                             
> Stack dump:
> 0.	Running pass 'Function Pass Manager' on module 'radeon'.
> 1.	Running pass 'AMDGPU Assembly Printer' on function '@search'
> Aborted

Rebuilding libclc should fix this.

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--- Comment #31 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
I rebuilt libclc from your repo now.
Also update;rebuild;install the llvm,gallium,bfgminer.

Same error still exists.
Regards
Erdem

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--- Comment #32 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #31)
> I rebuilt libclc from your repo now.
> Also update;rebuild;install the llvm,gallium,bfgminer.
> 
> Same error still exists.
> Regards
> Erdem


Did you build it with the same version of clang that you are using with Mesa?

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--- Comment #33 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
Yes. I got same version...
Now, the error is gone. (I clean llvm and mesa repo, updated from trunk and
rebuild.)

bfgminer --benchmark generate error of:

[2013-06-14 03:24:24] Error -11: Building Program (clBuildProgram)
 int') with an expression of incompatible type 'unsigned int
__attribute__((ext_vector_type(2)))'
        uint r = rot(W[3].x,25u)^rot(W[3].x,14u)^((W[3].x)>>3U);
             ^   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 [2013-06-14 03:24:24] Failed to init GPU thread 0, disabling device 0
 [2013-06-14 03:24:24] Restarting the GPU from the 


"bfgminer --benchmark -v1" locks the GPU and gpu doesn't restart...
Thanks.

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--- Comment #34 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
>From latest llvm & mesa trunk:
"bfgminer --benchmark" generate error of:

EmitRawText called on an MCStreamer that doesn't support it,  something must
not be fully mc'ized
                                                                               
 Stack dump:
0.Running pass 'Function Pass Manager' on module 'radeon'.
1.Running pass 'AMDGPU Assembly Printer' on function '@search'
Aborted

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--- Comment #35 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #34)
> From latest llvm & mesa trunk:
> "bfgminer --benchmark" generate error of:
> 
> EmitRawText called on an MCStreamer that doesn't support it,  something must
> not be fully mc'ized
>                                                                             
> Stack dump:
> 0.Running pass 'Function Pass Manager' on module 'radeon'.
> 1.Running pass 'AMDGPU Assembly Printer' on function '@search'
> Aborted

This error means you need to rebuild libclc using whatever version of clang you
linked Mesa against.

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--- Comment #36 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
Ops. I forgot to update libclc.

After compiling it from trunk

 [2013-06-29 00:32:23] Started bfgminer 3.1.1
 [2013-06-29 00:32:23] CL Platform 0 vendor: Mesa
 [2013-06-29 00:32:23] CL Platform 0 name: Default
 [2013-06-29 00:32:23] CL Platform 0 version: OpenCL 1.1 MESA 9.2.0-devel
 [2013-06-29 00:32:23] Platform 0 devices: 1
 [2013-06-29 00:32:23]     0    AMD BARTS
 [2013-06-29 00:32:23] Unable to load ati adl library
 [2013-06-29 00:32:23] Init GPU thread 0 GPU 0 virtual GPU 0
 [2013-06-29 00:32:23] CL Platform vendor: Mesa
 [2013-06-29 00:32:23] CL Platform name: Default
 [2013-06-29 00:32:23] CL Platform version: OpenCL 1.1 MESA 9.2.0-devel
 [2013-06-29 00:32:23] List of devices:
 [2013-06-29 00:32:23]     0    AMD BARTS
 [2013-06-29 00:32:23] Selected 0: AMD BARTS
 [2013-06-29 00:32:23] Selecting phatk kernel for Mesa
 [2013-06-29 00:32:24] Initialising kernel phatk121016.cl without bitalign, 2
vectors and worksize 128
 [2013-06-29 00:32:24] initCl() finished. Found AMD BARTS
 [2013-06-29 00:32:24] 1 gpu miner threads started
 [2013-06-29 00:32:24] Pool 0 not providing work fast enough
LLVM ERROR: Cannot select: 0x7fc57026bd40: v4i32,ch = load 0x7fc5701aadf0,
0x7fc57026b960, 0x7fc570268c40<LD8[undef], zext from i64> [ID=157]
  0x7fc57026b960: i32 = Constant<92> [ID=16]
  0x7fc570268c40: i32 = undef [ID=2]
In function: search

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #37 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
Any news?

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--- Comment #38 from Aaron Watry <awatry@gmail.com> ---
(In reply to comment #37)
> Any news?

Sorry to leave you hanging here...  I was still able to reproduce the lockups
as of a week ago on a Cedar (5400), but I replaced my desktop 6850 with a 7850
about a month back and I've been focusing most of my efforts there.

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--- Comment #39 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
Still got luck ups with my HD6850.
Using latest trunk with 3.11 RC4 kernel.. :(

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--- Comment #40 from Aaron Watry <awatry@gmail.com> ---
Can you apply the following LLVM 2 code series, build the latest upstream
libclc version, and try again?

LLVM Patch series:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20130812/184088.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20130812/184089.html

Libclc:
git clone http://llvm.org/git/libclc.git

With that, and the latest mesa git code, I've managed to run bfgminer for ~5
minutes on a Radeon 5400 without a single lockup.  This same GPU used to lock
up within 5 seconds of starting: bfgminer -v1 --benchmark

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--- Comment #41 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
I think those patches are merged with llvm-trunk. Manually installation give me
hunks and fails.

I update/build/install llvm-trunk,ibclc-trunk mesa-trunk and now I still got
lock ups!???
( Using 3.11.rc5 with disabled dpm )

---


If you have clean patches, I can test them also.
Because this patches gives me 

/temp/llvm/lib/Target/R600/SIInstrInfo.td:39:1: error: def 'SIload_constant'
already defined

error at compile time...
Thanks

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--- Comment #42 from Aaron Watry <awatry@gmail.com> ---
(In reply to comment #41)
> I think those patches are merged with llvm-trunk. Manually installation give
> me hunks and fails.

The second LLVM series is not yet merged upstream, but the first one is.  I was
able to use a clean LLVM/Clang checkout from today with the second series on my
Cedar-based machine.

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--- Comment #43 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
I patched llvm with

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20130812/184089.html

using

patch -N -p1 -i p2.patch

But still got lock-ups.
Any hints? :/

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--- Comment #44 from Aaron Watry <awatry@gmail.com> ---
I just retested on my CEDAR with fresh git mesa/llvm. bfgminer is still working
correctly for 5+ minutes without a single lock-up on my machine.  Kernel is
3.11 final with DPM enabled.

The following are the only patches that I have applied that are not yet
upstream:

LLVM:
http://llvm-reviews.chandlerc.com/D1449

Mesa:
http://lists.freedesktop.org/archives/mesa-dev/2013-August/043932.html
http://lists.freedesktop.org/archives/mesa-dev/2013-August/043951.html
http://lists.freedesktop.org/archives/mesa-dev/2013-August/043686.html

You probably don't need that last patch, since it's targeted at Southern
Islands.

I honestly don't know if any of those patches would improve anything for you,
but it's what I just successfully tested my evergreen with. You may need to do
some slight re-basing of the first patch to take into account some of the
recent changes in r600g.

I do have my 6850 installed in an old Athlon 64 machine at home.  I was already
thinking of hooking that machine back up (it's in storage at the moment), so I
may be able to re-test this on my 6850 in the next few days... assuming I don't
get sidetracked by house maintenance issues.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #45 from Aaron Watry <awatry@gmail.com> ---
(In reply to comment #43)
> I patched llvm with
> 
> http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20130812/184089.
> html
> 
> using
> 
> patch -N -p1 -i p2.patch
> 
> But still got lock-ups.
> Any hints? :/

I just did a fresh install of Ubuntu 3.04 64bit on an Athlon 64 with a radeonsi
6850.

I did a checkout of LLVM/clang master and applied only the following patch:
http://llvm-reviews.chandlerc.com/file/data/lzktdebskepaizauyiqg/PHID-FILE-ke45wuyidarlnthfbtcg/D1449.diff

Without that patch, libclc won't currently build for the radeonsi target.

Along with that I checked out git copies of Mesa, drm, and libclc.  I upgraded
the kernel to 3.11 from the Ubuntu mainline ppa, but I didn't enable dpm
(machine wouldn't boot with it enabled, and I was too busy to debug that).

With this done and all of the aforementioned packages compiled and installed to
/usr/local, I have been running 'bfgminer -v1 --benchmark' without a single
lockup for 20 minutes now on a radeonsi 6850 that used to exhibit the same lock
ups that we have been discussing, and which also seem to have been cured on the
5400 card I was esting on before.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #46 from Aaron Watry <awatry@gmail.com> ---
Autocorrect got the best of me...  s/radeonsi/radeon/g

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Erdem U. Altınyurt <spamjunkeater@gmail.com> changed:

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

--- Comment #47 from Erdem U. Altınyurt <spamjunkeater@gmail.com> ---
Hi Aaron,
Well, without the patch, I can verify that bfgminer started to work on my
HD6850, using mesa/llvm/libclc trunk.

Thanks.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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darkbasic <darkbasic@linuxsystems.it> changed:

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

--- Comment #48 from darkbasic <darkbasic@linuxsystems.it> ---
bfgminer -v1 --scrypt keeps segfaulting (without scrypt it works fine).
Scrypt is needed for litecoin mining.

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #49 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 86004
  --> https://bugs.freedesktop.org/attachment.cgi?id=86004&action=edit
Possible Fix #2

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

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #50 from darkbasic <darkbasic@linuxsystems.it> ---
It doesn't work, but at least now it hangs at:

R600_DEBUG=cs bfgminer --scrypt -o stratum+tcp://stratum2.wemineltc.com:3334 -u
user.1 -p password -I 13 -v1

 [2013-09-17 21:03:59] Started bfgminer 3.2.0
 [2013-09-17 21:03:59] Started bfgminer 3.2.0
 [2013-09-17 21:03:59] Probing for an alive pool
 [2013-09-17 21:04:00] Network difficulty changed to 1.03k ( 7.39Gh/s)
 [2013-09-17 21:04:00] Stratum from pool 0 detected new block
 [2013-09-17 21:04:00] Pool 0 is hiding block contents from us
 [2013-09-17 21:04:24] Killing OCL 0Errore di segmentazione

and as soon as I press CTRL+C I get a segfault in dmesg:
[ 1275.112334] bfgminer[6407]: segfault at 2d0 ip 00007f6a3d18ef01 sp
00007fffc765cc10 error 4 in libpthread-2.15.so[7f6a3d185000+17000]

I don't know where to find the output of R600_DEBUG=cs, sorry.

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--- Comment #51 from darkbasic <darkbasic@linuxsystems.it> ---
Created attachment 86012
  --> https://bugs.freedesktop.org/attachment.cgi?id=86012&action=edit
bfgminer debug

Here is the stderr output of RADEON_DUMP_SHADERS=1 bfgminer --scrypt -o
stratum+tcp://stratum2.wemineltc.com:3334 -u user.1 -p password -v1

Thanks

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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--- Comment #52 from darkbasic <darkbasic@linuxsystems.it> ---
Created attachment 86167
  --> https://bugs.freedesktop.org/attachment.cgi?id=86167&action=edit
debug radeonsi nopatch

With the patch there are no shaders in the output, so here is the output
without the patch.

RADEON_DUMP_SHADERS=1 bfgminer --scrypt -o
stratum+tcp://stratum2.wemineltc.com:3334 -u user.1 -p password -v1 2>
debug.txt

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[Bug 64201] OpenCL usage result segmentation fault on r600g with HD6850.

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Tom Stellard <tstellar@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #86004|0                           |1
        is obsolete|                            |

--- Comment #53 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 86762
  --> https://bugs.freedesktop.org/attachment.cgi?id=86762&action=edit
Possible Fix #3

Can you try this patch?

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--- Comment #54 from darkbasic <darkbasic@linuxsystems.it> ---
No sorry but it doesn't help.

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--- Comment #55 from Tom Stellard <tstellar@gmail.com> ---
(In reply to comment #54)
> No sorry but it doesn't help.

Sorry, I should have mentioned this will only help with pre-SI GPUs.

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[Bug 64201] bfgminer OpenCL usage result segmentation fault on r600g with HD6850

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Vedran Miletić <vedran@miletic.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|OpenCL usage result         |bfgminer OpenCL usage
                   |segmentation fault on r600g |result segmentation fault
                   |with HD6850.                |on r600g with HD6850

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Vedran Miletić <vedran@miletic.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |99553


Referenced Bugs:

https://bugs.freedesktop.org/show_bug.cgi?id=99553
[Bug 99553] Tracker bug for runnning OpenCL applications on Clover
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--- Comment #56 from Jan Vesely <jan.vesely@rutgers.edu> ---
this is an old bug. Is this still an issue?

pyrit works OK on my turks as well as carrizo+iceland:
#2: 'OpenCL-Device 'AMD TURKS (DRM 2.48.0 / 4.9.12-200.fc25.x86_64, LLVM
5.0.0)'': 10480.1 PMKs/s (RTT 2.3)

#1: 'OpenCL-Device 'AMD CARRIZO (DRM 3.1.0 / 4.4.0-ROC, LLVM 4.0.0)'': 16205.3
PMKs/s (RTT 1.6)
#2: 'OpenCL-Device 'AMD ICELAND (DRM 3.1.0 / 4.4.0-ROC, LLVM 4.0.0)'': 2072.7
PMKs/s (RTT 1.5)

bfgminer works as well:
OCL0        | 20s:106.8 avg:79.71 u:23.09 Mh/s | A:1 R:0+0(none) HW:0/none

OCL0        | 20s:184.9 avg:182.3 u:75.27 Mh/s | A:2 R:2+0( 50%) HW:0/none
OCL1        | 20s:48.50 avg:47.25 u:37.64 Mh/s | A:1 R:1+0( 50%) HW:0/none

cgminer removed GPU code long time ago

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--- Comment #57 from darkbasic <darkbasic@linuxsystems.it> ---
Can't test right now, I'm reinstalling my desktop with the HD7950.

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Vedran Miletić <vedran@miletic.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #58 from Vedran Miletić <vedran@miletic.net> ---
Resolving per comment 56. Darkbasic, if you find that this is still an issue,
please reopen.

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