https://bugs.freedesktop.org/show_bug.cgi?id=70779
--- Comment #5 from EoD EoD@xmw.de --- Created attachment 121742 --> https://bugs.freedesktop.org/attachment.cgi?id=121742&action=edit dmesg after running the uint_add16() kernel
(In reply to Hristo Venev from comment #4)
Here are two kernels that fail: __kernel void uint_div(__global const uint *a, __global const uint *b, __global uint *c){ c[0]=a[0]/b[0]; } __kernel void uint_add16(__global const uint *a, __global const uint *b, __global uint *c){ for(uint i=0;i<16;i++) c[i]=a[i]+b[i]; }
I actually can confirm that the 2nd kernel does cause a GPU stall in the radeon driver (r600/Barts). It causes no problem with amdgpu (radeonsi/Tonga).
I am using kernel 4.5.0-rc3, current llvm 3.8 branch and current mesa git.
As I am not overly good with OpenCL, is this kernel somehow problematic?