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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 - [GEN9+] 14-24% perf drop in SynMark2 v7 CSDof"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109517">bug 109517</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Assignee</td>
<td>intel-3d-bugs@lists.freedesktop.org
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<td>jason@jlekstrand.net
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GEN9+] 14-24% perf drop in SynMark2 v7 CSDof"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109517#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [GEN9+] 14-24% perf drop in SynMark2 v7 CSDof"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109517">bug 109517</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>bisected to series ending in:
a920979d4f30a48a23f8ff375ce05fa8a947dd96
Author: Jason Ekstrand <<a href="mailto:jason@jlekstrand.net">jason@jlekstrand.net</a>>
intel/fs: Use split sends for surface writes on gen9+
Surface reads don't need them because they just have the one address
payload. With surface writes, on the other hand, we can put the address
and the data in the different halves and avoid building the payload all
together.
The decrease in register pressure and added freedom in register
allocation resulting from this change reduces spilling enough to improve
the performance of one customer benchmark by about 2x.
Reviewed-by: Iago Toral Quiroga <<a href="mailto:itoral@igalia.com">itoral@igalia.com</a>></pre>
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