<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT, HSW, SKL, BXT, KBL] GPU hangs with GfxBench 4.0 CarChase" href="https://bugs.freedesktop.org/show_bug.cgi?id=96743#c41">Comment # 41</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [BYT, HSW, SKL, BXT, KBL] GPU hangs with GfxBench 4.0 CarChase" href="https://bugs.freedesktop.org/show_bug.cgi?id=96743">bug 96743</a> from <a class="email" href="mailto:topi.pohjolainen@intel.com" title="Topi Pohjolainen <topi.pohjolainen@intel.com>"> Topi Pohjolainen</a> <pre>(In reply to Topi Pohjolainen from <a href="show_bug.cgi?id=96743#c21">comment #21</a>) > Okay, disabling these two optimizations gives the gpu hangs on HSW even on > top of current upstream: > > diff --git a/src/intel/compiler/brw_nir.c b/src/intel/compiler/brw_nir.c > index f863085..5d83ce3 100644 > --- a/src/intel/compiler/brw_nir.c > +++ b/src/intel/compiler/brw_nir.c > @@ -470,7 +470,6 @@ nir_optimize(nir_shader *nir, const struct brw_compiler > *compiler, > do { > progress = false; > OPT_V(nir_lower_vars_to_ssa); > - OPT(nir_opt_copy_prop_vars); > > if (is_scalar) { > OPT(nir_lower_alu_to_scalar); > @@ -498,9 +497,6 @@ nir_optimize(nir_shader *nir, const struct brw_compiler > *compiler, > OPT(nir_opt_dce); > } > OPT(nir_opt_if); > - if (nir->options->max_unroll_iterations != 0) { > - OPT(nir_opt_loop_unroll, indirect_mask); > - } > OPT(nir_opt_remove_phis); > OPT(nir_opt_undef); > OPT_V(nir_lower_doubles, nir_lower_drcp | Using this on top of current upstream gave me a hang also on IVB already on 3rd try. This allows me to debug locally on my laptop.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>