HP-UX Reference (11i v3 07/02) - 1 User Commands N-Z (vol 2)

rtsched(1) rtsched(1)

0 if command is successfully scheduled or if pid’s real-time priority is successfully changed;

1 if command is not executable, pid does not exist, or priority is not within the priority range

for the corresponding scheduler;

2 if command (pid) lacks real-time capability, or the invoker’s effective user

is not a user

who has appropriate privileges, or the real or effective user or the real or effective user

does not match the real or saved user

ID of the process being changed; or

5 if rtsched encountered an internal error or if rtsched is not supported by this release.

EXAMPLES

Execute ﬁle

a.out with SCHED_FIFO at a priority of 10:

rtsched -s SCHED_FIFO -p 10 a.out

Execute ﬁle a.out with SCHED_RTPRIO at a priority of 127 (this is synonymous to

rtprio 127

a.out

rtsched -s SCHED_RTPRIO -p 127 a.out

Execute ﬁle a.out with the SCHED_HPUX scheduler:

rtsched -s SCHED_HPUX a.out

This is useful to spawn a timeshare priority command from a real-time priority shell.

Set the currently running process pid 24217 to execute with SCHED_RR2 at a priority of 20:

rtsched -s SCHED_RR2 -p 20 -P 24217

Now change its priority to 10 using the same scheduler:

rtsched -p 10 -P 24217

WARNINGS

Priority values used by rtsched may differ from those used by other commands. For example, ps(1)

displays the internal representation of priority values.

AUTHOR

rtsched was developed by HP.