nicety

nicety

nicety is a process priority management daemon for Linux that sets a process's:

• CPU affinity
• scheduling priority
• I/O scheduling class and priority
• realtime attributes

based on udev-like rules.

Usage

Create rules in the /etc/nicety/rules.d directory.

Enable the systemd service with:

systemctl enable --now nicety

Rules

Rules are JSON files with the extension .rules.

Example rule /etc/nicety/rules.d/make.rules:

{ "name": "make", "nice": 19, "io_class": "idle", "sched_policy": "idle" }

Valid keys:

• name: the name of the process cmdline as given in /proc/<PID>/cmdline (required)
• cpu_affinity: bond a process to a given set of CPUs (man page)
• nice: alter the scheduling priority (man page)
• io_class: set I/O scheduling class (man page)
• io_priority: set I/O scheduling priority (man page)
• sched_policy: set realtime scheduling policy (man page)
• sched_priority: set realtime scheduling priority (man page)
• delay: delay after which the above attributes are applied if the process is still running

License

This project is licensed under the MIT License (see LICENSE).