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CHRT

Section: Linux User's Manual (1)
Updated: Apr 2003
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NAME

chrt - manipulate real-time attributes of a process  

SYNOPSIS

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

DESCRIPTION

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.  

OPTIONS

-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
 

USAGE

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]
 

PERMISSIONS

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

AUTHOR

Written by Robert M. Love.  

REPORTING BUGS

Report bugs to <rml@tech9.net>.  

COPYRIGHT

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.  

SEE ALSO

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

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


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
USAGE
PERMISSIONS
AUTHOR
REPORTING BUGS
COPYRIGHT
SEE ALSO