libpipew...module-rt(7) Miscellaneous Information Manuallibpipew...module-rt(7)
NAME
libpipewire-module-rt - RT
DESCRIPTION
The rt modules can give real-time priorities to processing threads.
It uses the operating system's scheduler to enable realtime scheduling
for certain threads to assist with low latency audio processing. This
requires RLIMIT_RTPRIO to be set to a value that's equal to this
module's rt.prio parameter or higher. Most distros will come with some
package that configures this for certain groups or users. If this is not
set up and DBus is available, then this module will fall back to using
the Portal Realtime DBus API or RTKit.
MODULE NAME
libpipewire-module-rt
MODULE OPTIONS
• nice.level: The nice value set for the application thread. It improves
performance of the communication with the pipewire daemon.
• rt.prio: The realtime priority of the data thread. Higher values are
higher priority.
• rt.time.soft, rt.time.hard: The amount of CPU time an RT thread can
consume without doing any blocking calls before the kernel kills the
thread. This is a safety measure to avoid lockups of the complete
system when some thread consumes 100%.
• rlimits.enabled: enable the use of rtlimits, default true.
• rtportal.enabled: enable the use of realtime portal, default true
• rtkit.enabled: enable the use of rtkit, default true
• uclamp.min: the minimum utilisation value the scheduler should
consider
• uclamp.max: the maximum utilisation value the scheduler should
consider
The nice level is by default set to an invalid value so that clients
don't automatically have the nice level raised.
The PipeWire server processes are explicitly configured with a valid
nice level.
CONFIG OVERRIDE
A module.rt.args config section can be added to override the module
arguments.
# ~/.config/pipewire/pipewire.conf.d/my-rt-args.conf
module.rt.args = {
#nice.level = 22
}
EXAMPLE CONFIGURATION
context.modules = [
{ name = libpipewire-module-rt
args = {
#nice.level = 20
#rt.prio = 88
#rt.time.soft = -1
#rt.time.hard = -1
#rlimits.enabled = true
#rtportal.enabled = true
#rtkit.enabled = true
#uclamp.min = 0
#uclamp.max = 1024
}
flags = [ ifexists nofail ]
}
]
PipeWire 1.4.2 libpipew...module-rt(7)
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