[prev in list] [next in list] [prev in thread] [next in thread]
List: kwin
Subject: Re: Review Request: Swap vsync order, trade in 1frame lag, try harder to detect nvidia framerate (re
From: Thomas_Lübking <thomas.luebking () web ! de>
Date: 2012-05-03 15:44:26
Message-ID: 20120503154426.7786.87205 () vidsolbach ! de
[Download RAW message or body]
[Attachment #2 (multipart/alternative)]
> On May 3, 2012, 8:46 a.m., Martin Gräßlin wrote:
> > kwin/scene.cpp, lines 163-180
> > <http://git.reviewboard.kde.org/r/103058/diff/7/?file=58316#file58316line163>
> >
> > why this define?
I think I raised the option to do this and we never defined whether to do or not, so \
i just added both variants. The way it is we lie about the time which has actually \
passed to compensate the lagging frame (what makes the animation shorter but fix the \
time regarding the triggering event)
You can just pick one or i'll remove the dead branch before committing (and add a \
comment that we lie)
> On May 3, 2012, 8:46 a.m., Martin Gräßlin wrote:
> > kwin/scene_opengl_egl.cpp, lines 63-77
> > <http://git.reviewboard.kde.org/r/103058/diff/7/?file=58319#file58319line63>
> >
> > should it go in?
I'll try on gles syncing tonight - drivers got eventually updated but according to \
fredrik this should actually be just forced on by all mesa drivers. TBDR however can \
likely really not sync for principal reasons - do you have a PowerVR on some board?
> On May 3, 2012, 8:46 a.m., Martin Gräßlin wrote:
> > kwin/scene_opengl_glx.cpp, lines 84-93
> > <http://git.reviewboard.kde.org/r/103058/diff/7/?file=58320#file58320line84>
> >
> > what about this ifdef'ed code?
The commented check is actually "correct" by when i tried only nvidia but not intel \
passed it. Latter yelled and "rage" (that reads" "out of range" - i'm really good at \
typos ;-) error - what is wrong. The command would deactivate the swapinterval \
(syncing glXSwapBuffers calls) but as mentioned according to fredrik and iirc, that's \
forced on anyway (got to re-investigate)
It however doesn't have *that* much of an impact since glXSwapBuffers isn't the \
default action anyway (on glx)
I'd similarly add a comment about what should happen and why we don't check instead \
of the branch
- Thomas
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/103058/#review13315
-----------------------------------------------------------
On April 21, 2012, 6:11 p.m., Thomas Lübking wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/103058/
> -----------------------------------------------------------
>
> (Updated April 21, 2012, 6:11 p.m.)
>
>
> Review request for kwin and Martin Gräßlin.
>
>
> Description
> -------
>
> 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
>
>
> Diffs
> -----
>
> kwin/composite.cpp 6a27e00
> kwin/libkwineffects/kwinglutils_funcs.h a2c047b
> kwin/libkwineffects/kwinglutils_funcs.cpp 6d79507
> kwin/options.h 4d37d8b
> kwin/options.cpp 6eabc78
> kwin/scene.h c7e462f
> kwin/scene.cpp 450402e
> kwin/scene_opengl.h 98d4dd4
> kwin/scene_opengl.cpp 43d30ad
> kwin/scene_opengl_egl.cpp d0ce360
> kwin/scene_opengl_glx.cpp 67400a8
> kwin/scene_xrender.h 98c4b3b
> kwin/scene_xrender.cpp 265825c
> kwin/workspace.h 0dcb29c
> kwin/workspace.cpp a9deaaa
>
> Diff: http://git.reviewboard.kde.org/r/103058/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 waiting for the \
> sync.
>
> Thanks,
>
> Thomas Lübking
>
>
[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 />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <p style="margin-top: 0;">On May 3rd, 2012, 8:46 a.m., <b>Martin \
Gräßlin</b> wrote:</p> <blockquote style="margin-left: 1em; border-left: 2px solid \
#d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; \
border-collapse: collapse; margin: 2px padding: 2px;"> <thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; \
font-size: 9pt; padding: 4px 8px; text-align: left;"> <a \
href="http://git.reviewboard.kde.org/r/103058/diff/7/?file=58316#file58316line163" \
style="color: black; font-weight: bold; text-decoration: \
underline;">kwin/scene.cpp</a> <span style="font-weight: normal;">
(Diff revision 7)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">void \
Scene::paintScreen(int* mask, QRegion* region)</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">162</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#define LIE_ABOUT_TIME_DIFF 1</span></pre></td> </tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">163</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> \
<span class="p">(</span><span class="o">!</span><span class="n">last_time</span><span \
class="p">.</span><span class="n">isValid</span><span class="p">())</span> <span \
class="p">{</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px solid \
#C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">163</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span \
class="p">(</span><span class="o">!</span><span class="n">last_time</span><span \
class="p">.</span><span class="n">isValid</span><span class="p">())</span> <span \
class="p">{</span></pre></td> </tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">164</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="c1">// \
Painting has been idle (optimized out) for some time,</span></pre></td> <th \
bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">164</font></th> <td bgcolor="#ffffff" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="c1">// Painting has been idle (optimized out) for some time,</span></pre></td> \
</tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">165</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="c1">// \
which means time_diff would be huge and would break animations.</span></pre></td> \
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">165</font></th> <td bgcolor="#ffffff" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="c1">// which means time_diff would be huge and would break \
animations.</span></pre></td> </tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">166</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="c1">// \
Simply set it to one (zero would mean no change at all and could</span></pre></td> \
<th bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">166</font></th> <td bgcolor="#ffffff" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="c1">// Simply set it to one (zero would mean no change at all and \
could</span></pre></td> </tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">167</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="c1">// \
cause problems).</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px \
solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">167</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "> <span class="c1">// cause \
problems).</span></pre></td> </tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">168</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="n">time_diff</span> <span class="o">=</span> <span class="mi">1</span><span \
class="p">;</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px solid \
#C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">168</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "> <span class="n">time_diff</span> <span \
class="o">=</span> <span class="mi">1</span><span class="p">;</span></pre></td> \
</tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">169</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="n">last_time</span><span class="p">.</span><span class="n">start</span><span \
class="p">();</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px solid \
#C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">169</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "> <span class="n">last_time</span><span \
class="p">.</span><span class="n">start</span><span class="p">();</span></pre></td> \
</tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">170</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span> \
<span class="k">else</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px \
solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">170</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "> <span class="p">}</span> <span \
class="k">else</span></pre></td> </tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">171</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#if LIE_ABOUT_TIME_DIFF</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">172</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="n">time_diff</span> <span class="o">=</span> <span \
class="n">last_time</span><span class="p">.</span><span class="n">restart</span><span \
class="p">()</span> <span class="o">+</span> <span class="n">wspace</span><span \
class="o">-></span><span class="n">nextFrameDelay</span><span \
class="p">();</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">173</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#else</span></pre></td> </tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">171</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="n">time_diff</span> <span class="o">=</span> <span \
class="n">last_time</span><span class="p">.</span><span class="n">restart</span><span \
class="p">();</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px solid \
#C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">174</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "> <span class="n">time_diff</span> <span \
class="o">=</span> <span class="n">last_time</span><span class="p">.</span><span \
class="n">restart</span><span class="p">();</span></pre></td> </tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">175</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#endif</span></pre></td> </tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">172</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#f0f0f0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">176</font></th> <td bgcolor="#ffffff" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> \
</tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">173</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> \
<span class="p">(</span><span class="n">time_diff</span> <span class="o"><</span> \
<span class="mi">0</span><span class="p">)</span> <span class="c1">// check time \
rollback</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px solid \
#C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">177</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span \
class="p">(</span><span class="n">time_diff</span> <span class="o"><</span> <span \
class="mi">0</span><span class="p">)</span> <span class="c1">// check time \
rollback</span></pre></td> </tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">174</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="n">time_diff</span> <span class="o">=</span> <span class="mi">1</span><span \
class="p">;</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px solid \
#C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">178</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "> <span class="n">time_diff</span> <span \
class="o">=</span> <span class="mi">1</span><span class="p">;</span></pre></td> \
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">179</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#undef LIE_ABOUT_TIME_DIFF</span></pre></td> </tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">why this define?</pre> \
</blockquote>
</blockquote>
<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; \
white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I think I \
raised the option to do this and we never defined whether to do or not, so i just \
added both variants. The way it is we lie about the time which has actually passed to \
compensate the lagging frame (what makes the animation shorter but fix the time \
regarding the triggering event)
You can just pick one or i'll remove the dead branch before committing (and add a \
comment that we lie)</pre> <br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <p style="margin-top: 0;">On May 3rd, 2012, 8:46 a.m., <b>Martin \
Gräßlin</b> wrote:</p> <blockquote style="margin-left: 1em; border-left: 2px solid \
#d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; \
border-collapse: collapse; margin: 2px padding: 2px;"> <thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; \
font-size: 9pt; padding: 4px 8px; text-align: left;"> <a \
href="http://git.reviewboard.kde.org/r/103058/diff/7/?file=58319#file58319line63" \
style="color: black; font-weight: bold; text-decoration: \
underline;">kwin/scene_opengl_egl.cpp</a> <span style="font-weight: normal;">
(Diff revision 7)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; \
">SceneOpenGL::SceneOpenGL(Workspace* ws)</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">63</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#if 0</span><span class="c"></span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">64</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> // "theoretically".</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">65</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> // - internet rumors say: it doesn't work with \
TBDR</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">66</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> // - eglSwapInterval has no impact on intel GMA chips</span></pre></td> \
</tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">67</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> has_waitSync = options->glVSync;</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">68</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> if (has_waitSync) {</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">69</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> has_waitSync = (eglSwapInterval( dpy, 1) == \
EGL_TRUE);</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">70</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> if (!has_waitSync)</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">71</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> kWarning(1212) << "Could not activate EGL v'sync \
on this system";</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">72</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> }</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">73</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> if (!has_waitSync)</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">74</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> eglSwapInterval( dpy, 0); // deactivate syncing</span></pre></td> \
</tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">75</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c">#else</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">76</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> has_waitSync = false;</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">77</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#endif</span></pre></td> </tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">should it go in?</pre> \
</blockquote>
</blockquote>
<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; \
white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I'll \
try on gles syncing tonight - drivers got eventually updated but according to fredrik \
this should actually be just forced on by all mesa drivers. TBDR however can likely \
really not sync for principal reasons - do you have a PowerVR on some board?</pre> \
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: \
10px;"> <p style="margin-top: 0;">On May 3rd, 2012, 8:46 a.m., <b>Martin \
Gräßlin</b> wrote:</p> <blockquote style="margin-left: 1em; border-left: 2px solid \
#d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; \
border-collapse: collapse; margin: 2px padding: 2px;"> <thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; \
font-size: 9pt; padding: 4px 8px; text-align: left;"> <a \
href="http://git.reviewboard.kde.org/r/103058/diff/7/?file=58320#file58320line84" \
style="color: black; font-weight: bold; text-decoration: \
underline;">kwin/scene_opengl_glx.cpp</a> <span style="font-weight: normal;">
(Diff revision 7)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; \
">SceneOpenGL::SceneOpenGL(Workspace* ws)</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">84</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#if 0</span><span class="c"></span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">85</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> if (glXSwapInterval(0) == 0) // no good - mesa/dri \
return an invalid rage error</span></pre></td> </tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">83</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="n">has_waitSync</span> <span class="o">=</span> <span \
class="kc">true</span><span class="p">;</span></pre></td> <th bgcolor="#f0f0f0" \
style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">86</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="c"> \
has_waitSync = true;</span></pre></td> </tr>
<tr>
<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2">84</font></th> <td bgcolor="#ffffff" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> <span \
class="k">else</span></pre></td> <th bgcolor="#f0f0f0" style="border-left: 1px solid \
#C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font \
size="2">87</font></th> <td bgcolor="#ffffff" width="50%"><pre style="font-size: \
8pt; line-height: 140%; margin: 0; "><span class="c"> \
else</span></pre></td> </tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">88</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> qWarning() << "NO VSYNC! glXSwapInterval \
failed" << glXWaitVideoSync(1, 0, &sync);</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">89</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c">#else</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">90</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> // instead just try to deactivate - mesa/dri/intel will \
likely throw an error, though</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">91</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> has_waitSync = true;</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">92</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="c"> glXSwapInterval(0);</span></pre></td> </tr>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" \
align="right"><font size="2"></font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td> <th \
bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid \
#C0C0C0;" align="right"><font size="2">93</font></th> <td bgcolor="#c5ffc4" \
width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span \
class="cp">#endif</span></pre></td> </tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: \
-pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">what about this \
ifdef'ed code?</pre> </blockquote>
</blockquote>
<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; \
white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">The \
commented check is actually "correct" by when i tried only nvidia but not \
intel passed it. Latter yelled and "rage" (that reads" "out of \
range" - i'm really good at typos ;-) error - what is wrong. The command \
would deactivate the swapinterval (syncing glXSwapBuffers calls) but as mentioned \
according to fredrik and iirc, that's forced on anyway (got to re-investigate)
It however doesn't have *that* much of an impact since glXSwapBuffers isn't \
the default action anyway (on glx)
I'd similarly add a comment about what should happen and why we don't check \
instead of the branch</pre> <br />
<p>- Thomas</p>
<br />
<p>On April 21st, 2012, 6:11 p.m., Thomas Lübking wrote:</p>
<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>
<p style="color: grey;"><i>Updated April 21, 2012, 6:11 p.m.</i></p>
<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">(6a27e00)</span></li>
<li>kwin/libkwineffects/kwinglutils_funcs.h <span style="color: \
grey">(a2c047b)</span></li>
<li>kwin/libkwineffects/kwinglutils_funcs.cpp <span style="color: \
grey">(6d79507)</span></li>
<li>kwin/options.h <span style="color: grey">(4d37d8b)</span></li>
<li>kwin/options.cpp <span style="color: grey">(6eabc78)</span></li>
<li>kwin/scene.h <span style="color: grey">(c7e462f)</span></li>
<li>kwin/scene.cpp <span style="color: grey">(450402e)</span></li>
<li>kwin/scene_opengl.h <span style="color: grey">(98d4dd4)</span></li>
<li>kwin/scene_opengl.cpp <span style="color: grey">(43d30ad)</span></li>
<li>kwin/scene_opengl_egl.cpp <span style="color: grey">(d0ce360)</span></li>
<li>kwin/scene_opengl_glx.cpp <span style="color: grey">(67400a8)</span></li>
<li>kwin/scene_xrender.h <span style="color: grey">(98c4b3b)</span></li>
<li>kwin/scene_xrender.cpp <span style="color: grey">(265825c)</span></li>
<li>kwin/workspace.h <span style="color: grey">(0dcb29c)</span></li>
<li>kwin/workspace.cpp <span style="color: grey">(a9deaaa)</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