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Quick links About
priocntrl
Syntax
Examples
Related commands
Linux / Unix main page
About priocntrl
Display's or set scheduling parameters of specified
process(es)
Syntax
priocntrl [-l] [-d] [-s] [-e] [-i idtype] [idlist] [-c
class] [class-specific options] [arguments]
| -l |
Display a list of the classes currently configured in the system along with class-specific
information about each class. The format of the class specific information displayed is described under USAGE. |
| -d |
Display the scheduling parameters associated with a set of processes. |
| -s |
Set the scheduling parameters associated with a set of processes. |
| -e |
Execute a specified command with the class and scheduling parameters associated with a set of processes. |
| -i idtype |
This option together with the idlist arguments (if any), specify one or more processes to which the priocntl command is to apply. The interpretation of idlist depends on the value of idtype. The valid idtype arguments and corresponding
interpretations of idlist are as follows:
| -i pid |
idlist is a list of process IDs. The priocntl command applies to the
specified processes. |
| -i ppid |
idlist is a list of parent process IDs. The priocntl command applies to all processes whose parent process ID is in |
| -i pgid |
idlist is a list of process group IDs. The priocntl command applies to all
processes in the specified process groups. |
| -i sid |
idlist is a list of session IDs. The priocntl command applies to all
processes in the specified sessions. |
| -i class |
idlist consists of a single class name
(RT for real-time or TS for time-sharing or IA for inter-active). The priocntl
command applies to all processes in the specified class. |
| -i uid |
idlist is a list of user IDs.
The priocntl command applies to all
processes with an effective user ID equal to an ID from the list. |
| -i gid |
idlist is a list of group IDs. The priocntl command applies to all processes with an effective
group ID equal to an ID from the list. |
| -i all |
The priocntl command applies to all existing processes. No idlist should be specified (if one is it is ignored). The permission restrictions described below still apply. |
If the -i idtype option is omitted when using the -d or -s options the default idtype of pid is
assumed. |
| -c class |
Specifies the class to be set. (The valid class arguments are RT for real-time or TS for time-sharing or IA for inter-active.) If the specified class is not already configured, it will
automatically be configured. |
| class-specific options |
The valid class-specific options for setting real-time
parameters are:
| -p rtpri |
Set the real-time priority of the specified
process(es) to rtpri. |
| -t tqntm [-r res] |
Set the time quantum of the specified
process(es) to tqntm. You may optionally specify a resolution as explained below. |
The valid class-specific options for setting time-sharing parameters are:
| -m tsuprilim |
Set the user priority limit of the specified
process(es) to tsuprilim. |
| -p tsupri |
Set the user priority of the specified process(es)
to tsupri. |
The valid class-specific options for setting inter-active
parameters are:
| -m iauprilim |
Set the user priority limit of the specified process(es) to iauprilim. |
| -p iaupri |
Set the user priority of the specified
process(es) to iaupri. |
|
| arguments |
Additional arguments to the
priocntrl command. |
Examples
priocntl -s -c RT -t 1 -r 10 -i idtype idlist -
Sets the class of any non-real-time processes selected by idtype and
idlist to real-time and sets their real-time priority to the default
value of 0.
Related commands
nice
ps
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