6ed5d2e2b4
Threaded swap wait was added for using together with the Nvidia GLX driver due to the lack of anything equivalent to the INTEL_swap_event GLX extension. The purpose was to avoid inhibiting the invocation of idle callbacks when constantly rendering, as the combination of throttling on swap-interval 1 and glxSwapBuffers() and the frame clock source having higher priority than the default idle callback sources meant they would never be invoked. This was solved in gbz#779039 by introducing a thread that took care of the vsync waiting, pushing frame completion events to the main thread meaning the main thread could go idle while waiting to draw the next frame instead of blocking on glxSwapBuffers(). As of https://gitlab.gnome.org/GNOME/mutter/merge_requests/363, the main thread will instead use prediction to estimate when the next frame should be drawn. A side effect of this is that even without INTEL_swap_event, we would not block as much, or at all, on glxSwapBuffers(), as at the time it is called, we have likely already hit the vblank, or will hit it soon. After having introduced the swap waiting thread, it was observed that the Nvidia driver used a considerable amount of CPU waiting for the vblank, effectively wasting CPU time. The need to call glFinish() was also problematic as it would wait for the frame to finish, before continuing. Due to this, remove the threaded swap wait, and rely only on the frame clock not scheduling frames too early. Fixes: https://bugzilla.gnome.org/show_bug.cgi?id=781835 Related: https://gitlab.gnome.org/GNOME/mutter/issues/700 [jadahl: Rewrote commit message] https://gitlab.gnome.org/GNOME/mutter/merge_requests/602 |
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| .gitlab-ci | ||
| clutter | ||
| cogl | ||
| data | ||
| doc | ||
| meson | ||
| po | ||
| src | ||
| tools | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| config.h.meson | ||
| COPYING | ||
| meson.build | ||
| meson_options.txt | ||
| mutter.doap | ||
| NEWS | ||
| README.md | ||
Mutter
Mutter is a Wayland display server and X11 window manager and compositor library.
When used as a Wayland display server, it runs on top of KMS and libinput. It implements the compositor side of the Wayland core protocol as well as various protocol extensions. It also has functionality related to running X11 applications using Xwayland.
When used on top of Xorg it acts as a X11 window manager and compositing manager.
It contains functionality related to, among other things, window management, window compositing, focus tracking, workspace management, keybindings and monitor configuration.
Internally it uses a fork of Cogl, a hardware acceleration abstraction library used to simplify usage of OpenGL pipelines, as well as a fork af Clutter, a scene graph and user interface toolkit.
Mutter is used by, for example, GNOME Shell, the GNOME core user interface, and by Gala, elementary OS's window manager. It can also be run standalone, using the command "mutter", but just running plain mutter is only intended for debugging purposes.
Contributing
To contribute, open merge requests at https://gitlab.gnome.org/GNOME/mutter.
The coding style used is primarily the GNU flavor of the GNOME coding
style
with some minor additions such as preferring stdint.h types over GLib
fundamental types, and a soft 80 character line limit. However, in general,
look at the file you're editing for inspiration.
Commit messages should follow the GNOME commit message guidelines. We require an URL to either an issue or a merge request in each commit.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.