pwr_idle_ctl man page on HP-UX

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pwr_idle_ctl(5)						       pwr_idle_ctl(5)

NAME
       pwr_idle_ctl   -	 control  power	 consumption  in  idle	processors  on
       Integrity platforms

VALUES
   Fail Safe
   Default
   Allowed values
DESCRIPTION
       The tunable can be used to dynamically control the power consumption of
       idle  processors on Integrity systems.  The tunable can be changed from
       through where represents the least power saving and represents the max‐
       imum  power saving in idle processors.  Equal or greater idle processor
       power saving is guaranteed by increasing the value of this tunable.

       When the tunable is set to the power saving feature is turned off.

       This tunable is supported only on  Integrity  platforms	with  Intel(R)
       Itanium(R)  Processors  9000  Series and later.	It is not supported on
       PA-RISC platforms.

       This tunable is not supported while  running  in	 a  Integrity  Virtual
       Machine guest environment.

   Who Is Expected to Change This Tunable?
       System  administrators  who  want  to control power utilization on idle
       processors.

   Restrictions on Changing
       The tunable will not take effect on processors belonging	 to  processor
       sets whose lcpu attribute is turned ON.

       This tunable is dynamic.

   When Should the Tunable Be Turned On?
       The tunable should be turned on to save power on idle systems.

   What Are the Side Effects of Turning the Tunable On?
       Some  workloads may experience performance degradation when the tunable
       is enabled.

   What Are the Side Effects of Turning the Tunable Off?
       With the tunable turned off, the	 system	 administrator	may  not  take
       advantage of possible power saving on idle systems.

   What Other Tunables 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.

       Increase in power savings is not guaranteed with an increase in tunable
       values in certain environments.

       Enabling this tunable may impact the performance of  certain  types  of
       workloads.

       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.

SEE ALSO
       psrset(1M), lcpu_attr(5).

Integrity Systems Only	   Tunable Kernel Parameters	       pwr_idle_ctl(5)
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