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thread: Support making threads real time scheduled

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Real time scheduling is needed for better control of when we commit
updates to the kernel, so add a property to MetaThread that, if the
thread implementation uses a kernel thread and not a user thread, RTKit
is asked to make the thread real time scheduled using the maximum
priority allowed.

Currently RTKit doesn't support the GetAll() D-Bus properties method, so
some fall back code is added, as GDBusProxy depends on GetAll() working
to make the cached properties up to date. Once
https://github.com/heftig/rtkit/pull/30 lands and becomes widely
available in distributions, the work around can be dropped.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2777>
This commit is contained in:
Jonas Ådahl
2022-10-24 15:25:31 +02:00
parent 276ebbf5ee
commit bd2fa92c29
4 changed files with 314 additions and 0 deletions
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1
src/tests/mutter_dbusrunner.py
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@ -48,6 +48,7 @@ class MutterDBusRunner(DBusTestCase):
klass.start_from_local_template('localed')
klass.start_from_local_template('colord')
klass.start_from_local_template('gsd-color')
klass.start_from_local_template('rtkit')
klass.system_bus_con = klass.get_dbus(system_bus=True)
klass.session_bus_con = klass.get_dbus(system_bus=False)