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<body><span class="vcard"><a class="email" href="mailto:mark.a.janes@intel.com" title="Mark Janes <mark.a.janes@intel.com>"> <span class="fn">Mark Janes</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW - GFXBench5 Tesselation benchmark: 10% perf regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107743">bug 107743</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Assignee</td>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
<td>jason@jlekstrand.net
</td>
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<td style="text-align:right;">Keywords</td>
<td>
</td>
<td>bisected, regression
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - GFXBench5 Tesselation benchmark: 10% perf regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107743#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - GFXBench5 Tesselation benchmark: 10% perf regression"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107743">bug 107743</a>
from <span class="vcard"><a class="email" href="mailto:mark.a.janes@intel.com" title="Mark Janes <mark.a.janes@intel.com>"> <span class="fn">Mark Janes</span></a>
</span></b>
<pre>8d8222461f9d7f497d657c2c0eff70820986429b is the first bad commit
commit 8d8222461f9d7f497d657c2c0eff70820986429b
Author: Jason Ekstrand <<a href="mailto:jason.ekstrand@intel.com">jason.ekstrand@intel.com</a>>
Date: Mon Jul 23 22:20:41 2018 -0700
intel/nir: Enable nir_opt_find_array_copies
We have to be a bit careful with this one because we want it to run in
the optimization loop but only in the first brw_nir_optimize call.
Later calls assume that we've lowered away copy_deref instructions and
we don't want to introduce any more.
Shader-db results on Kaby Lake:
total instructions in shared programs: 15176942 -> 15176942 (0.00%)
instructions in affected programs: 0 -> 0
helped: 0
HURT: 0
In spite of the lack of any shader-db improvement, this patch completely
eliminates spilling in the Batman: Arkham City tessellation shaders.
This is because we are now able to detect that the temporary array
created by DXVK for storing TCS inputs is a copy of the input arrays and
use indirect URB reads instead of making a copy of 4.5 KiB of input data
and then indirecting on it with if-ladders.
Reviewed-by: Caio Marcelo de Oliveira Filho <<a href="mailto:caio.oliveira@intel.com">caio.oliveira@intel.com</a>></pre>
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