This is the command reniced that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
reniced - renice running processes based on regular expressions
SYNOPSIS
reniced [-h] [-v] [-o format] [configfile]
OVERVIEW
reniced takes a list of regular expressions, looks for processes (and threads) matching
them and renices the processes to given values. reniced can also change io priorities.
DESCRIPTION
On start, reniced reads a configuration file. It consists of nice values and regular
expressions.
It then scans the process table using the ps(1) command. Whenever a process name from the
CMD column matches a regular expression, that process is reniced to the given value. If a
process matches multiple regular expressions, all rule matches are executed in order and
the last match wins.
When run as root, reniced will scan all processes ("`ps H -e`"). When run as a user,
renice only scans the user's processes ("`ps H --user`").
Switches
-h This prints the version number, a short help text and exits without doing anything.
-v This activates verbose mode. Error messages, some statistics and all renice actions
are printed to stdout.
-o format
Set the ps(1) output format to filter on. The default format is "comm". See the -o
parameter in the ps(1) manpage for details.
configfile
This reads the regular expressions from an alternate configfile.
The default location of the configfile is "/etc/reniced.conf" if reniced is run as
root, "~/.reniced" otherwise.
Configuration file format
The configuration file is composed of single lines. Empty lines and lines starting with a
# are ignored.
Every line must consist of a command followed by a whitespace and a Perl regular
expression.
The regular expression is matched against the ps(1) output. For every matched process the
command is executed.
A command generally takes the form of a character followed by a number. Multiple commands
can be given simultaneously with no spaces inbetween. Sometimes the number is optional.
Command characters
n Sets the nice value of a process. Must be followed by a number, usually within the
range of -20 to 19.
For backwards compatibility a n at the beginning of the command can be left out (if
the command starts with a number it is treated as a nice value).
r Sets the io priority to the realtime scheduling class. The optional number is
treated as class data (typically 0-7, lower being higher priority).
b Sets the io priority to the best-effort scheduling class. The optional number is
treated as class data (typically 0-7, lower being higher priority).
i Sets the io priority to the idle scheduling class. No number needs to be given as
the idle scheduling class ignores the class data value.
o Sets the OOM killer adjustment in "/proc/$PID/oom_adj" to the given number.
Examples
"5 ^bash"
gives currently running bash shells a nice value of 5
"b2 ^tar"
sets currently running tar-processes to io priority best-effort within class 2
"i torrent"
sets currently running torrent-like applications to io priority idle
"n-10r4 seti"
gives currently running seti-processes a nice value of -10 and sets them to realtime
io priority in class 4
MODULES NEEDED
use BSD::Resource;
This module can be obtained from <http://www.cpan.org>.
PROGRAMS NEEDED
ps
ionice
ionice is only needed if you want to change io priority. It can be obtained from
<http://rlove.org/schedutils/>.
You also need a suitable kernel and scheduler, e.g. Linux 2.6 with CFQ.
Use reniced online using onworks.net services
