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> AFAIK, Windows runs part of the Audio subsystem outside the kernel, but these processes get special treatment by the scheduler to meet deadlines.

Assigning deadline-based scheduling priorities to the pipewire daemon wouldn't do the same job?



Isn't the deadline realtime scheduler optional? How many distros do actually ship it in their default kernels? I honestly didn't manage to keep track of this.


The deadline scheduler is upstream, see "man 7 sched" for a description: https://man7.org/linux/man-pages/man7/sched.7.html

What is not upstream (yet) is the PREEMPT_RT patch which makes all kernel threads fully preemptible.




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