On Jan 24 2024, at 3:33 am, Jeremy Jongepier <jeremy@autostatic.com> wrote:
Maybe it's related to Real-Time group scheduling, see
https://www.kernel.org/doc/Documentation/scheduler/sched-rt-group.txt
That certainly seems like a good possibility to investigate.
This note is on that document page you referenced:
Realtime group scheduling means you have to assign a portion of total CPU
bandwidth to the group before it will accept realtime tasks. Therefore you will
not be able to run realtime tasks as any user other than root until you have
done that, even if the user has the rights to run processes with realtime
priority!