npri(1)

NAME
     npri - modify the scheduling priority of a process

SYNOPSIS
     npri [ -w ] | [ -r priority [ -s policy ] ] | [ -n nice ] | [ -t slice ]
     [ -p pid ]
     npri [ -w ] | [ -r priority [ -s policy ] ] | [ -n nice ] | [ -t slice ]
     [ cmd args ... ]

DESCRIPTION
     This command allows the super-user to modify certain scheduling
     parameters of a process or to create a new process with specific
     scheduling parameters.  For a detailed description of how the parameters
     affect the scheduling of a process, please see the sched_setscheduler(2)
     manual page.  If npri is invoked without reference to a specific process
     or command to execute, it simply invokes a copy of the user's shell, as
     specified by the SHELL environment variable, with the scheduling
     characteristics specified.

OPTIONS
     The following options are supported:

     -w        This option makes the process weightless. A weightless process
               executes at a priority strictly less than any other process in
               the system.

     -r priority
               This option sets the priority of a process. For real-time
               policies (see -s) the valid priority range is 0 to 255, while
               the time-share policy accepts priorities ranging from 1 to 40.
               When used without the -s option, npri will attempt to reset the
               priority of the specified process according to its current (or
               inherited) policy.

     -s policy This option sets the scheduling policy of a process. The
               supported policies are FIFO and RR for real-time and TS for
               timeshare. Both the policy and priority will be inherited by
               any new children of the process.  Care should be used when
               assigning real-time policies, since such a process is not
               preemptable by normal interactive processes.  Refer to
               realtime(5) for more details.

     -n nice   This option sets the absolute nice value of a process.  The
               nice value affects how normal UNIX priority calculations are
               made.  The allowable range of nice values is 0 to 39.  Refer to
               nice(2) for more information.

     -t slice  This option sets the time-slice for the process, in terms of
               the basic kernel clock frequency (called ticks).  The 4D Series
               machines use a clock frequency of 100 hertz, so one tick is 10
               milliseconds.  For example, a slice value of 3 gives a 30
               millisecond time slice.  The time slice value will be inherited
               by any new children of the process.

     -h priority
               This option has been deprecated and will be removed in a future
               release.  Please use the -r and -s options to achieve the
               desired effect.

     -p pid    This option names a specific process whose priority is to be
               altered.  This makes it possible to change priorities of a
               running process.

SEE ALSO
     nice(2), schedctl(2), sched_setscheduler(2), realtime(5).