The user interface changed slightly upstream, but is far easier now.
[jkacur@fionn tuna]$ tuna --help
usage: tuna [-h] [-v] [-L LOG-LEVEL] [-D]
{isolate,include,move,spread,priority,run,save,apply,show_threads,show_irqs,show_configs,what_is,gui}
...
tuna - Application Tuning Program
commands:
{isolate,include,move,spread,priority,run,save,apply,show_threads,show_irqs,show_configs,what_is,gui}
isolate Move all allowed threads and IRQs away from CPU-LIST
include Allow all threads to run on CPU-LIST
move Move selected entities to CPU-LIST
spread Spread selected entities over CPU-LIST
priority Set thread scheduler tunables: POLICY and RTPRIO
run Fork a new process and run the COMMAND
save Save kthreads sched tunables to FILENAME
apply Apply changes described in profile
show_threads Show thread list
show_irqs Show IRQ list
show_configs List preloaded profiles
what_is Provides help about selected entities
gui Start the GUI
options:
-h, --help show this help message and exit
-v, --version show version
-L LOG-LEVEL, --logging LOG-LEVEL
Log application details to file for given LOG-LEVEL
-D, --debug Print DEBUG level logging details to console
[jkacur@fionn tuna]$ tuna priority -h usage: tuna priority [-h] -t THREAD-LIST [-C] POLICY:RTPRIO
Set thread scheduler tunables: POLICY and RTPRIO
positional arguments:
POLICY:RTPRIO Set thread scheduler tunables: POLICY and RTPRIO
options:
-h, --help show this help message and exit
-t THREAD-LIST, --threads THREAD-LIST
THREAD-LIST affected by commands
-C, --affect_children
Operation will affect children thread
[jkacur@fionn tuna]$ pgrep "xfce4-session"
2334
[jkacur@fionn tuna]$ chrt -p $(pgrep "xfce4-session")
pid 2334's current scheduling policy: SCHED_OTHER
pid 2334's current scheduling priority: 0
[jkacur@fionn tuna]$ tuna priority -t 2334 SCHED_FIFO:1
[jkacur@fionn tuna]$ chrt -p $(pgrep "xfce4-session")
pid 2334's current scheduling policy: SCHED_FIFO
pid 2334's current scheduling priority: 1