<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><span class="vcard"><a class="email" href="mailto:ytriffy@gmail.com" title="Vyacheslav <ytriffy@gmail.com>"> <span class="fn">Vyacheslav</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTABUG - [PERF] Updating ubo offset via vkCmdBindDescriptorSets is causing flush that is taking 50% of rendering time"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105695">bug 105695</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEEDINFO
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>NOTABUG
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTABUG - [PERF] Updating ubo offset via vkCmdBindDescriptorSets is causing flush that is taking 50% of rendering time"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105695#c4">Comment # 4</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED NOTABUG - [PERF] Updating ubo offset via vkCmdBindDescriptorSets is causing flush that is taking 50% of rendering time"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105695">bug 105695</a>
from <span class="vcard"><a class="email" href="mailto:ytriffy@gmail.com" title="Vyacheslav <ytriffy@gmail.com>"> <span class="fn">Vyacheslav</span></a>
</span></b>
<pre>I found the problem with my code - I did vkQueueWaitIdle() after each frame and
it was taking up 80% of rendering time (yes, I'm still learning vulkan). I
changed it to waiting on fences that are passed to vkQueueSubmit(). I have
triple buffering, so I have three images in swap chain - 0,1,2. I record
command buffers, submit and present 0,1,2 without waiting, then on frame 3 I
wait on fence for completion of rendering of frame 0. On frame 4 I wait for
completion of frame 1 and so on. I know I can do more than 3 but that alone
gave me a big performance increase. Now in vulkan I get 28ms/frame, in opengl
58ms/frame. And on vulkan cpu is load is <70%, in opengl cpu load is constantly
<span class="quote">>95%. So lesson learned - proper synchronization is important.</span ></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>