Testing the Wayland backend for Dolphin-Emu

[Scott Moreau]

Hi 小龙 陈,

Thanks for testing. I did not have time to try very many possible cases.

On Mon, Feb 18, 2013 at 3:19 PM, 小龙 陈 <chillermillerlong at hotmail.com> wrote:

> Hi everyone,
>
> I did some testing with the new Wayland backend for Dolphin-emu posted here
> yesterday:
> http://lists.freedesktop.org/archives/wayland-devel/2013-February/007470.html
>
> Hopefully someone find them useful. Please let me know if you have any
> questions (I'm no developer :D) or if there's anything else you would like
> me
> to test.
>
> Best Regards,
> Xiao-Long Chen
>
>
> ----------
> Build info
> ----------
> Dolphin-Emu Git Master
>  -> cmake .. -DCMAKE_INSTALL_PREFIX=/opt/dolphin-emu-master \
>              -DCMAKE_BUILD_TYPE=Release
>
> Dolphin-Emu Wayland-EGL Branch
>  -> Built against wayland commit: df1a934b8b24c9227d427f3035007867993a6612
>     and weston commit:            1cc9e08d2fbd59e34cf5009acd5067a6b171c20a
>     and mesa commit:              dd599188d2868838541859a76800a8420958d358
>  -> CXXFLAGS="-I/opt/wayland/include -L/opt/wayland/lib" \
>       cmake .. -DCMAKE_INSTALL_PREFIX=/opt/dolphin-emu-wayland \
>                -DCMAKE_PREFIX_PATH=/opt/dolphin-emu-wayland \
>                -DCMAKE_BUILD_TYPE=Release \
>                -DUSE_EGL=1     \
>                -DDISABLE_WX=1  \
>                -DUSE_X11=1     \
>                -DUSE_WAYLAND=1
>
> -------
> Testing
> -------
> The testing was done on a Lenovo W520 with Intel Sandy Bridge graphics and
> an
> NVIDIA Quadro 2000m. I used the Intel GPU because nouveau has rendering
> issues
> with dolphin. The game tested was Super Smash Bros Brawl (for Wii).
>
> The system is running Ubuntu 13.04 with wayland, weston, and mesa compiled
> from
> git. I did record videos of all of the tests, but they don't really show
> anything. Ffmpeg with x11grab had a ~40% performance hit, recordmydesktop
> was
> incredibly stuttery and had a low bitrate, and Weston's built in recorder
> had a
> ~60% performance hit in full screen mode (and a 10GB file).
>
> Needless to say, the videos are useless, so I'll write my general findings
> on
> the quality.
>
> ----------------------
> Dolphin-Emu Git Master
> ----------------------
> Windowed (640x480)
>  -> X11: Always 60 fps
>
> Full Screen (1920x1080)
>  -> X11: Usually 60 fps (with no compositing), 49~52 fps (with compositing)
>
> ------------------------------
> Dolphin-Emu Wayland-EGL Branch
> ------------------------------
> Windowed (640x480)
>  -> X11:     Unplayable:
>                Sometimes it runs at 60 fps, but the area from the bottom
> right
>                corner of the window to the center of the window
> continuously
>                flickers. Other parts of the screen are also corrupted
> while the
>                game is running.
>                Other times, the game runs at 0~16 fps and the top ~15% of
> the
>                window is corrupted.
>

This sounds like what I experienced using the GLX path.


>  -> Wayland: Usually 60 fps with occasional slowdown to 57 fps
>
> Full Screen (1920x1080)
>  -> X11:     Unplayable: same as in windowed mode
>

X11+EGL seem to work ok here in windowed and fullscreen.


>  -> Wayland: 57~60 fps with occasional slowdown to 53 fps
>

It is noteworthy that the maximum frames per second should never exceed the
refresh rate of your monitor, with the current mesa EGL implementation.


>
> -------
> Quality
> -------
> X11 without compositing was pretty stuttery at times, especially when the
> game
> slowed down (ie. with 4 players in SSBB). With compositing enabled, the
> game
> was slow, but it was very smooth.
>
> Under wayland, the gameplay was very smooth like in X11 w/compositing, but
> it
> felt much faster. The fps generally stayed around 60 fps, except during the
> graphically intensive parts of the game. I was not able to find any
> rendering
> issues that didn't exist in X (or Windows, for that matter).
>
> X with EGL was completely unplayable. The problems with rendering makes it
> very hard to press the buttons necessary to even enter the game.
>

Thanks for your review. It's nice to have informative testers.


- Scott
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/wayland-devel/attachments/20130218/2ee4f9b8/attachment.html>