rtsched_numpri(5)rtsched_numpri(5)NAMErtsched_numpri - number of priority values to support for POSIX.1b
realtime applications
VALUES
Failsafe
Default
Allowed Values
is allowed.
Recommended Value
DESCRIPTION
The tunable defines how many priority values to support for POSIX 1.b
realtime applications. A larger value provides additional flexibility
to applications in managing relative priorities of all threads with
respect to each other and with respect to other applications running in
the system. However, a larger value adds processing overhead in the
operating system in terms of managing larger run queues with the possi‐
bility of increased search times.
Who Is Expected to Change This Tunable?
Anyone.
Restrictions on Changing
Changes to this tunable take effect at next reboot.
When Should the Value of This Tunable Be Raised?
When the system is primarily running POSIX realtime applications, and
requires additional flexibility in managing relative priorities of
applications.
What Are the Side Effects of Raising the Value?
Raising the value of the tunable may cause some operating system over‐
head due to larger and possibly more sparse run queues.
When Should the Value of This Tunable Be Lowered?
The default value of the tunable is already set to the minimum possible
value.
What Other Tunable Values Should Be Changed at the Same Time?
None.
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parame‐
ter may be removed or have its meaning changed in future releases of
HP-UX.
Installation of optional kernel software, from HP or other vendors, may
cause changes to tunable parameter values. After installation, some
tunable parameters may no longer be at the default or recommended val‐
ues. For information about the effects of installation on tunable val‐
ues, consult the documentation for the kernel software being installed.
For information about optional kernel software that was factory
installed on your system, see at
AUTHOR
was developed by HP.
Tunable Kernel Parameters rtsched_numpri(5)