[systemd-devel] User services and realtime scheduling

Denis Martinez denis.martinez at gmx.com
Thu Aug 14 14:54:37 UTC 2025


Hello,

Some clarification is needed on how to acquire realtime permissions, 
because the solutions documented in MY_SERVICE_CANT_GET_REALTIME.md seem 
no longer applicable (currently on systemd 257.7).

The journal indicates that the attributes are not known.

Unknown key 'ControlGroup' in section [Service], ignoring.
Unknown key 'ControlGroupAttribute' in section [Service], ignoring.


How to obtain the RT budget under the current paradigm?


Good day.
DM


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