<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - UnrealEngine v4 demos startup (CS compilation) never finishes" href="https://bugs.freedesktop.org/show_bug.cgi?id=98455#c3">Comment # 3</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - UnrealEngine v4 demos startup (CS compilation) never finishes" href="https://bugs.freedesktop.org/show_bug.cgi?id=98455">bug 98455</a> from <a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> Eero Tamminen</a> <pre>VehicleGame demo also uses CS, and also freezes at startup, also with today's Mesa git version. One minute period of perf recording shows process 100% CPU usage being split like this (i.e. it's compiling compute shader forever, like with others): # Overhead Command Shared Object Symbol # ........ ............... ....................... 37.66% i965_dri.so ra_add_node_adjacency 18.93% i965_dri.so ra_allocate 8.14% i965_dri.so brw::fs_live_variables::compute_start_end 7.46% i965_dri.so fs_visitor::virtual_grf_interferes 6.75% i965_dri.so decrement_q.isra.2 5.40% i965_dri.so fs_visitor::assign_regs 4.77% i965_dri.so ra_add_node_interference 1.80% libc-2.23.so __memcpy_sse2 1.74% i965_dri.so brw::fs_live_variables::compute_live_variables 1.21% libc-2.23.so _int_malloc 0.69% libc-2.23.so realloc Some of the other UnrealEngine v4 demos have also few compute shaders, this issue happens only with the ones where Mesa outputs this warning: Unsupported form of variable indexing in CS; falling back to very inefficient code generation (Freeze doesn't happen in CSDof test which also outputs that warning couple of times, though.)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>