<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 - glxgears reported frame rate doesn't match actual"
href="https://bugs.freedesktop.org/show_bug.cgi?id=97043">97043</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>glxgears reported frame rate doesn't match actual
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>10.5
</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>Demos
</td>
</tr>
<tr>
<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>b7.10110111@gmail.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Running glxgears with the following command
LIBGL_ALWAYS_INDIRECT=1 glxgears
prints 60 FPS on my system, while actual picture updates are about 1-2 FPS.
This is due to command buffering I believe. The fix would be something like
this:
--- glxgears.c.orig 2014-03-22 16:59:24.000000000 +0400
+++ glxgears.c 2016-07-22 12:24:15.260412891 +0300
@@ -340,6 +340,10 @@
draw_gears();
glXSwapBuffers(dpy, win);
+ /* Make sure that the whole draw-swap cycle is complete before
+ measurements. Otherwise we'll have rare updates but still
+ report high frame rates with indirect rendering. */
+ glFinish();
frames++;</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>
</ul>
</body>
</html>