<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 - [bisected] war thunder performance reduced by ~28%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=101978">101978</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[bisected] war thunder performance reduced by ~28%
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (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>Drivers/Gallium/radeonsi
</td>
</tr>
<tr>
<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>higuita@gmx.net
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Since sometime i notice that war thunder is running slower on my machine using
mesa-git, but as the game is always updating, i (wrongly) blamed some game
update.
Yet, some days ago, after a test with a steamOS, i could confirm that older
mesa versions worked faster than mesa-git, with the same game version. I
excluded the kernel version, so i have done a mesa bisect and found the (old)
commit that made war thunder lost about 28% performance on my setup (RX480 on a
A10-7850k):
commit ac6007460adaf4bb21028a3281ec622d1e43df49
Author: Marek Olšák <<a href="mailto:marek.olsak@amd.com">marek.olsak@amd.com</a>>
Date: Wed Feb 15 19:50:15 2017 +0100
radeonsi: upload constants into VRAM instead of GTT
This lowers lgkm wait cycles by 30% on VI and normal conditions.
The might be a measurable improvement when CE is disabled (radeon)
or under L2 thrashing.
I'm running slackware64 -current, with kernel 4.12.1, LLVM 4.0.1 and the game
is free, so you can test it. For the bisect i started the game, run the CPU
benchmark (as workaround some bug where most first benchmarks are slower) and
then run the "still scene" benchmark. as is the shorter one, but all others
had performance drop.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>