This library allows easy access to currently running applications and their control groups resources, using the systemd dbus API.

More info here: https://www.freedesktop.org/software/systemd/man/systemd.resource-control.html


To control an application's cgroup resources, use KApplicationScope.

To find a list of currently running applications, use KApplicationScopeLister.

For use in QML, KApplicationScopeListModel is provided to interact with an updated list of KApplicationScope's.

List of Classes


  • systemd >= 238 (for neon I used this PPA: https://launchpad.net/~ddstreet/+archive/ubuntu/systemd-upstream)
  • systemd.unified_cgroup_hierarchy=1 on the kernel command line (in /etc/default/grub)
  • Delegate=cpu in /etc/systemd/system/user@.service.d/override.conf to be able to control CPU resources from user systemd
  • install dbus-user-session to get the user systemd instance to connect to the session bus
  • run applications in systemd scopes by starting them with systemd-run --user --scope --unit org.kde.krun-<app_name>-<uuid>.desktop -- <app>. There is a currently a patch to let KRun launch apps this way