[Bug 96743] [BYT, HSW, SKL, BXT, KBL] GPU hangs with GfxBench 4.0 CarChase

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Mar 20 15:11:20 UTC 2017


https://bugs.freedesktop.org/show_bug.cgi?id=96743

--- Comment #20 from Topi Pohjolainen <topi.pohjolainen at intel.com> ---
Introduction of loop unrolling in nir (commit:
715f0d06d19e7c33d98f99c764c5c3249d13b1c0) seems to hide/fix this on HSW. With
unrolling I ran 15 times in a row without a hang. Disabling the unrolling came
me hang in the 2nd round. Disabling the unroll in current master doesn't seem
to bring back the hang though.

I inserted a commit disabling the unroll just after the commit introducing it
and trying to bisect again to see which commit fixes/hides it with the loop
unroll.

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