<html> <head> <base href="https://bugs.freedesktop.org/" /> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - OpenCL hangs with big kernels" href="https://bugs.freedesktop.org/show_bug.cgi?id=70779#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - OpenCL hangs with big kernels" href="https://bugs.freedesktop.org/show_bug.cgi?id=70779">bug 70779</a> from <a class="email" href="mailto:EoD@xmw.de" title="EoD <EoD@xmw.de>"> EoD</a> <pre>Created <a href="attachment.cgi?id=121742" name="attach_121742" title="dmesg after running the uint_add16() kernel">attachment 121742</a> <a href="attachment.cgi?id=121742&action=edit" title="dmesg after running the uint_add16() kernel">[details]</a> dmesg after running the uint_add16() kernel (In reply to Hristo Venev from <a href="show_bug.cgi?id=70779#c4">comment #4</a>) > 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?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>