[prev in list] [next in list] [prev in thread] [next in thread]
List: kwin
Subject: Review Request: Swap vsync order, trade in 1frame lag,
From: Thomas_Lübking <thomas.luebking () web ! de>
Date: 2011-11-06 18:17:38
Message-ID: 20111106181738.25606.74793 () vidsolbach ! de
[Download RAW message or body]
[Attachment #2 (multipart/alternative)]
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/103058/
-----------------------------------------------------------
Review request for kwin and Martin Gr=C3=A4=C3=9Flin.
Description
-------
This performs a paint & glFlush immediately after the buffer swapping and d=
efers the next swapping to the next anticipated frame (or idling)
The behavior is still not as deterministic as we hoped to be since we canno=
t measure the time for the actual vsync :\
I set a fuzzyness of 6ms what leads to a majority of 2-3ms times in waitsyn=
c but single wait times up to 8 or 9ms occur (what ultimately can be part o=
f the syncing itself)
There's some debug code to print lagging.
TODO:
- attempt egl support
- probably lie to the effects about the time
Diffs
-----
kwin/composite.cpp bc29233 =
kwin/options.cpp 19c3ee5 =
kwin/scene.h d8bcf48 =
kwin/scene.cpp 413e46f =
kwin/scene_basic.h a087eb5 =
kwin/scene_basic.cpp cc8dbdd =
kwin/scene_opengl.h e13d8a5 =
kwin/scene_opengl_egl.cpp 22e082c =
kwin/scene_opengl_glx.cpp ddebcd0 =
kwin/scene_xrender.h 6c916c8 =
kwin/scene_xrender.cpp 3618d79 =
kwin/workspace.h e4db7e7 =
kwin/workspace.cpp 70b2df8 =
Diff: http://git.reviewboard.kde.org/r/103058/diff/diff
Testing
-------
I've used a CRT for testing which can sync every 11ms ie. 85Hz and lowered =
the maxFPS down to 10fps with pretty constant results for the time lost wai=
ting for the sync.
Thanks,
Thomas L=C3=BCbking
[Attachment #5 (text/html)]
<html>
<body>
<div style="font-family: Verdana, Arial, Helvetica, Sans-Serif;">
<table bgcolor="#f9f3c9" width="100%" cellpadding="8" style="border: 1px #c9c399 \
solid;"> <tr>
<td>
This is an automatically generated e-mail. To reply, visit:
<a href="http://git.reviewboard.kde.org/r/103058/">http://git.reviewboard.kde.org/r/103058/</a>
</td>
</tr>
</table>
<br />
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" \
style="background-image: \
url('http://git.reviewboard.kde.org/media/rb/images/review_request_box_top_bg.png'); \
background-position: left top; background-repeat: repeat-x; border: 1px black \
solid;"> <tr>
<td>
<div>Review request for kwin and Martin Gräßlin.</div>
<div>By Thomas Lübking.</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" \
style="border: 1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">This performs a paint & glFlush immediately after the buffer \
swapping and defers the next swapping to the next anticipated frame (or idling) The \
behavior is still not as deterministic as we hoped to be since we cannot measure the \
time for the actual vsync :\ I set a fuzzyness of 6ms what leads to a majority of \
2-3ms times in waitsync but single wait times up to 8 or 9ms occur (what ultimately \
can be part of the syncing itself)
There's some debug code to print lagging.
TODO:
- attempt egl support
- probably lie to the effects about the time</pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: \
1px solid #b8b5a0"> <tr>
<td>
<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: \
-moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: \
break-word;">I've used a CRT for testing which can sync every 11ms ie. 85Hz and \
lowered the maxFPS down to 10fps with pretty constant results for the time lost \
waiting for the sync.</pre> </td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>kwin/composite.cpp <span style="color: grey">(bc29233)</span></li>
<li>kwin/options.cpp <span style="color: grey">(19c3ee5)</span></li>
<li>kwin/scene.h <span style="color: grey">(d8bcf48)</span></li>
<li>kwin/scene.cpp <span style="color: grey">(413e46f)</span></li>
<li>kwin/scene_basic.h <span style="color: grey">(a087eb5)</span></li>
<li>kwin/scene_basic.cpp <span style="color: grey">(cc8dbdd)</span></li>
<li>kwin/scene_opengl.h <span style="color: grey">(e13d8a5)</span></li>
<li>kwin/scene_opengl_egl.cpp <span style="color: grey">(22e082c)</span></li>
<li>kwin/scene_opengl_glx.cpp <span style="color: grey">(ddebcd0)</span></li>
<li>kwin/scene_xrender.h <span style="color: grey">(6c916c8)</span></li>
<li>kwin/scene_xrender.cpp <span style="color: grey">(3618d79)</span></li>
<li>kwin/workspace.h <span style="color: grey">(e4db7e7)</span></li>
<li>kwin/workspace.cpp <span style="color: grey">(70b2df8)</span></li>
</ul>
<p><a href="http://git.reviewboard.kde.org/r/103058/diff/" style="margin-left: \
3em;">View Diff</a></p>
</td>
</tr>
</table>
</div>
</body>
</html>
_______________________________________________
kwin mailing list
kwin@kde.org
https://mail.kde.org/mailman/listinfo/kwin
[prev in list] [next in list] [prev in thread] [next in thread]
Configure |
About |
News |
Add a list |
Sponsored by KoreLogic