[Wayland-bugs] [Bug 763350] drawing performance worse than X

[gtk+ (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=763350

--- Comment #40 from Christian Hergert <christian at hergert.me> ---
Created attachment 324156
  --> https://bugzilla.gnome.org/attachment.cgi?id=324156&action=edit
predicted presentation times

I'm going to add some updated patches for cogl and mutter, but I'm unconvinced
that we need them yet. Simply applying the gdk-wayland patch above gets us
almost all the way there.

The reason I'm suggesting not using the cogl and mutter patches will be obvious
by looking at the attached graph.

Notice how the predicted timing is 25msec across the board. This is what
happens when GdkFrameClock can't predict the timing and so it guesses "half-way
between frame". 16.7+8.35=25.5

I've been playing around with various tweaks in mutter and cogl and so far have
been unable to improve that. I thought that was the original problem and so I
focused on it far longer than I'm happy to admit.

-- 
You are receiving this mail because:
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/wayland-bugs/attachments/20160317/f6f3b303/attachment.html>