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.
chrt(1) manpage
Copyright (C) 2004 Robert Love
This is free documentation; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License.
The GNU General Public License's references to "object code"
and "executables" are to be interpreted as the output of any
document formatting or typesetting system, including
intermediate and printed output.
This manual is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public
License along with this manual; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
USA.
2002-05-11 Robert Love <rml@tech9.net>
Initial version
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