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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL/CFL GT2] Up to 20% perf drop in Sacha Willems' Vulkan Triangle demo"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109609#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL/CFL GT2] Up to 20% perf drop in Sacha Willems' Vulkan Triangle demo"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109609">bug 109609</a>
from <span class="vcard"><a class="email" href="mailto:kenneth@whitecape.org" title="Kenneth Graunke <kenneth@whitecape.org>"> <span class="fn">Kenneth Graunke</span></a>
</span></b>
<pre>I can reproduce a 20% difference, but it's...actually a 20% improvement. My
system is a Kabylake GT2 (Dell XPS 15 9650), Kernel 4.20.2-arch1-1-ARCH,
xserver 1.20.3.
It looks like a2ec78883f4 is slow, and 0b44644ca68 (genxml: Consistently use a
numeric "MOCS" field) is 20% faster. Needless to say, this is not expected,
that patch was supposed to just change the mechanism for programming MOCS, not
the actual values of MOCS used anywhere.</pre>
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