<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BXT]15% performance drop in SynMark v7.0 Multithread use-case"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102334">102334</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BXT]15% performance drop in SynMark v7.0 Multithread use-case
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>eero.t.tamminen@intel.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>i915 platform</th>
<td>BXT
</td>
</tr></table>
<p>
<div>
<pre>drm-tip kernel has caused ~15% drop in SynMark v7.0 Multithread 3D use-case
between these commits:
kernel git://anongit.freedesktop.org/drm-tip at
560582ef03d1f6bf9010232fcc6613188a00d198 2017-07-17_16-27-42 drm-tip:
2017y-07m-17d-16h-27m-16s UTC integration manifest
kernel git://anongit.freedesktop.org/drm-tip at
10de1e17faaab452782e5a1baffd1b30a639a261 2017-07-18_10-09-14 drm-tip:
2017y-07m-18d-10h-08m-42s UTC integration manifest
(This test has quite a large variance, but 15% drop in this period is very
clear from the longer term trend.)
This drop is BXT specific and visible on 2 different BXT (18 EU) J4205 devices.
Multithread test has 4 work threads doing low and hi resolution reflections /
environment map rendering, with main thread rendering the final HDR image with
tone mapping and bloom. This requires enough draw calls & syching that this
test is (mostly) CPU bound.
Note: The less CPU bound version (HdrBloom) of this test, which has only 1 work
thread instead of 4, and which uses higher resolution & details for that,
doesn't show any (clear) performance regression.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>