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hires_timeout_enable(5) File Formats Manual hires_timeout_enable(5)
NAME
hires_timeout_enable - enable high resolution timers support
VALUES
Failsafe
Default
Allowed values
Recommended values
unless applications require high resolution timers.
DESCRIPTION
is a dynamic tunable that enables/disables support for high resolution timers and timed sleep for the following Application Programming
Interfaces (APIs) - and With the higher resolution, these interfaces can be expected to support time intervals less than the current 10 ms.
Who Is Expected to Change This Tunable?
System administrators who need higher than default resolution for applications.
Restrictions on Changing
changes take effect immediately. However, changes to this tunable will not affect timed events already queued.
When Should the Value of This Tunable Be Raised?
The value of should be set to if applications require higher resolution for proper operation. Changes will be system-wide.
What Are the Side Effects of Raising the Value?
The number of timer-related interrupts may increase.
When Should the Value of This Tunable Be Lowered?
The value of may be set to if there is no longer any overriding need for higher than default resolution.
What Are the Side Effects of Lowering the Value?
Fewer timer-related interrupts.
What Other Tunable Values Should Be Changed at the Same Time?
None
WARNINGS
All HP-UX kernel tunable parameters are release specific. This parameter 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 values. For information about the effects of installation on tun-
able values, 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.
SEE ALSO
getitimer(2), nanosleep(2), semop(2), setitimer(2), sigtimedwait(2), timer_gettime(2), timer_settime(2), ualarm(2), usleep(2),
pthread_cond_wait(3T).
Tunable Kernel Parameters hires_timeout_enable(5)
08-21-2010
