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<body><span class="vcard"><a class="email" href="mailto:kenneth@whitecape.org" title="Kenneth Graunke <kenneth@whitecape.org>"> <span class="fn">Kenneth Graunke</span></a>
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<a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Performance regression: car chase, manhattan"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103247">bug 103247</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>kenneth@whitecape.org
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>ASSIGNED
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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Performance regression: car chase, manhattan"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103247#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED - Performance regression: car chase, manhattan"
href="https://bugs.freedesktop.org/show_bug.cgi?id=103247">bug 103247</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>This is pretty straightforward. It turns out that Car Chase does
glGenerateMipmaps on every frame (surprising!)...and that GenerateMipmaps binds
a single image as both a source texture and a render target, tripping the
self-dependency code.
But it binds one miplevel and renders to the next, which is fine. We set
MaxLevel accordingly, so this is relatively straightforward to detect. It also
gave us the idea of avoiding resolves on texture views that don't use all the
layers/levels...</pre>
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