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Ubuntu Manpage: pulseaudio - The PulseAudio Sound System
https://manpages.ubuntu.com/manpages/xenial/man1/pulseaudio.1.html
Unfortunately this is a security risk on most systems, since PulseAudio runs as user process, and giving realtime scheduling privileges to a user process always comes with the risk that the user misuses it to lock up the system -- which is possible since making a process real-time effectively disables preemption.
Ubuntu Manpage: pulseaudio - The PulseAudio Sound System
https://manpages.ubuntu.com/manpages/focal/man1/pulseaudio.1.html
--realtime[=BOOL] Try to acquire a real-time scheduling for PulseAudio's I/O threads. This will only succeed if the calling user has a non-zero RLIMIT_RTPRIO resource limit set (on systems that support this), or rtkit is available and allows PulseAudio to enable real-time scheduling, or we are configured to be run as system daemon (see --system ...
pulse-daemon: PulseAudio daemon configuration file - …
https://www.systutorials.com/docs/linux/man/5-pulse-daemon/
realtime-priority= The realtime priority to acquire, if realtime-scheduling is enabled. Note: JACK uses 10 by default, 9 for clients. Thus it is recommended to choose the PulseAudio real-time priorities lower. Some PulseAudio threads might choose a priority a little lower or higher than the specified value. Defaults to 5.
pulseaudio man | Linux Command Library
https://linuxcommandlibrary.com/man/pulseaudio
Try to acquire a real-time scheduling for PulseAudio's I/O threads. This will only succeed if the calling user has a non-zero RLIMIT_RTPRIO resource limit set (on systems that support this), or rtkit is available and allows PulseAudio to enable real-time scheduling, or we are configured to be run as system daemon (see --system above).
pulse-daemon.conf: PulseAudio daemon configuration …
https://www.systutorials.com/docs/linux/man/5-pulse-daemon.conf/
realtime-priority= The realtime priority to acquire, if realtime-scheduling is enabled. Note: JACK uses 10 by default, 9 for clients. Thus it is recommended to choose the PulseAudio real-time priorities lower. Some PulseAudio threads might choose a priority a little lower or higher than the specified value. Defaults to 5.
JACK, PulseAudio, RealTime / Multimedia and Games / Arch ...
https://bbs.archlinux.org/viewtopic.php?id=116243
JACK, PulseAudio, RealTime. Maybe this isn't possible, but I'm wondering if it is: Right now, I have JACK running with real-time scheduling enabled. I'm able to start it up, connect clients, etc, without any issues. I'm trying to run PulseAudio and have it connect as a JACK client, and if possible, I'd like it to run with realtime priority as well.
Project:Sound/How to Enable Realtime for Multimedia ...
https://wiki.gentoo.org/wiki/Project:Sound/How_to_Enable_Realtime_for_Multimedia_Applications
Some software, like PulseAudio, expects to find such a setup to allow users to make use of realtime support. Also, by creating its own group, the admin does not have to allow realtime scheduling for more users than needed. Note Variations on this guide can tighten security a bit, but might require further fiddling with the configuration of ...
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