OpenCL + r600g : Segmentation Fault!

[Death Knight]

I am using OpenSUSE 12.3 x86_64 with ATI 6850HD.

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

Using 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}
And 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)

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]

Does any one know / guess where I make the mistake?

[Death Knight]

This output might give a hint...

> 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

Does my gpu not support open source OpenCL, yet?

[agd5f]

Make sure you build llvm first and build mesa against the new llvm. You chips is supported.

[Death Knight]

Hi! Thanks for answer. But...

I am %100 percent sure that I compiled LLVM before mesa.
Also I am using latest 3.9 kernel, but 3.8.9 is same...

Now I tried again.

Updated to revision 180878.

<llvm-build-dir> ../llvm/configure --libdir=/usr/lib64 --prefix=/usr --enable-{optimized,pic,shared,assertions} --disable-{docs,timestamps} --enable-targets="x86_64" --enable-experimental-targets="R600"
and installed.

Also made "git pull" from xf86-video-ati and drm git repos
Than:

<mesa-dir>git clean -dfx
<mesa-dir>git pull
<mesa-dir>./autogen.sh
<mesa-dir>./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}
and installed.

Result: Same!
I don't know where is the problem.


Also with "cgminer --benchmark" I got,

[2013-05-02 02:01:32] Started cgminer 2.11.4Segmentation fault

dmesg says that:
[ 213.683079] cgminer[3553]: segfault at 20 ip 00007f87c4f743f0 sp 00007fff9c6af2d8 error 4 in libLLVM-3.3svn.so[7f87c47c7000+10a4000]

I tried with python;
>>>import opencl
>>>opencl.test()
>>> opencl.test()
[<opencl.Device name='AMD BARTS' type=4L>]
test_broadcast_0D (test.test_memobj.TestBuffer) ... ok
test_broadcast_2D (test.test_memobj.TestBuffer) ... ok
test_copy_1D (test.test_memobj.TestBuffer) ... FAIL
test_copy_2D (test.test_memobj.TestBuffer) ... FAIL
test_copy_2D_negative_stride (test.test_memobj.TestBuffer) ... expected failure
test_copy_contig (test.test_memobj.TestBuffer) ... Segmentation fault

dmesg says that: [ 313.634980] python[3984]: segfault at 60 ip 00007f8f69efb2d0 sp 00007fff723b6868 error 4 in pipe_r600.so[7f8f69d92000+299000]

I really feel uncomfortable with this situation.
Don't know what the issue is.

[Death Knight]

I think this is LLVM error, does it?
I don't know where to report this issue.
LLVM? Mesa?

Also not have any information about how could I collect more information about this segmentation faults...

[agd5f]

You can open an r600 gallium bug: https://bugs.freedesktop.org

[Death Knight]

As you requested.

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

Thanks.