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Manual Reference Pages  - CHRT (1)

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chrt - manipulate real-time attributes of a process

CONTENTS

Synopsis
Description
Options
Usage
Permissions
Author
Copyright

chrt [options] [prio] [pid | command [arg]...]

chrt(1) sets or retrieves the real-time scheduling attributes of an existing PID or runs COMMAND with the given attributes. Both policy (one of SCHED_FIFO, SCHED_RR, or SCHED_OTHER) and priority can be set and retrieved.

-p, --pid
	operate on an existing PID and do not launch a new task
-f, --fifo	set scheduling policy to SCHED_FIFO
-m, --max
	show minimum and maximum valid priorities, then exit
-o, --other
	set policy scheduling policy to SCHED_OTHER
-r, --rr
	set scheduling policy to SCHED_RR (the default)
-h, --help
	display usage information and exit
-v, --version
	output version information and exit

The default behavior is to run a new command::
	chrt [prio] -- [command] [arguments]
You can also retrieve the real-time attributes of an existing task:
	chrt -p [pid]
Or set them:
	chrt -p [prio] [pid]

A user must possess CAP_SYS_NICE to change the scheduling attributes of a process. Any user can retrieve the scheduling information.

Written by Robert M. Love.

Report bugs to <rml@tech9.net>.

Copyright © 2004 Robert M. Love
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

taskset(1), nice(1), renice(1)

See sched_setscheduler(2) for a description of the Linux scheduling scheme.

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