NAME

rtprio − execute process with realtime priority

SYNOPSIS

rtprio priority command [ arguments ]
rtprio priority -pid

HP−UX COMPATIBILITY

Level: HP-UX/STANDARD

Origin: HP

DESCRIPTION

Rtprio executes command with a realtime priority, or changes the realtime priority of currently executing process pid.  Realtime priorities range from one (highest) to 127 (lowest), a priority of zero indicates normal unix process scheduling which effectively makes the process non−realtime.  Realtime processes are not subject to priority degradation and are all of greater (scheduling) importance than non−realtime processes.  See rtprio(2) for more details. 

Command will not be scheduled, or pid’s realtime priority will not be changed, if the user is not a member of a group having PRIV_RTPRIO access or is not the super−user.  When changing the realtime priority of a currently executing process, the effective user ID of the calling process must be superuser, or the real or effective user ID must match the real or effective user ID of the process to be modified. 

SEE ALSO

rtprio(2), getprivgrp(2)

DIAGNOSTICS

Rtprio returns exit status 0 if command is successfully scheduled or if pid’s realtime priority is successfully changed, 1 if command is not executable or pid does not exist, 2 if command (pid) lacks realtime capability, or the invoker’s effective user ID is not superuser or effective user ID does not match the real or effective user ID of the process to be changed. 

Hewlett-Packard  —  last mod. May 11, 2021