Cisco Systems 57712, UCSCPCIEBTG manual 209

BIOS Parameters by Server Model

Advanced BIOS Parameters for C220 and C240 Servers

Name	Description
P-STATE Coordination	Allows you to define how BIOS communicates the P-state
	support model to the operating system. There are 3 models as
	defined by the Advanced Configuration and Power Interface
	(ACPI) specification.
	• HW_ALL—The processor hardware is responsible for
		coordinating the P-state among logical processors with
		dependencies (all logical processors in a package).
	• SW_ALL—The OS Power Manager (OSPM) is
		responsible for coordinating the P-state among logical
		processors with dependencies (all logical processors in a
		physical package), and must initiate the transition on all
		of the logical processors.
	• SW_ANY—The OS Power Manager (OSPM) is
		responsible for coordinating the P-state among logical
		processors with dependencies (all logical processors in a
		package), and may initiate the transition on any of the
		logical processors in the domain.
	Note	must be set to Custom or the server ignores the setting
		for this parameter.
Energy Performance	Allows you to determine whether system performance or energy
	efficiency is more important on this server. This can be one of
	the following:
	•
	•
	•
	•
	Note	must be set to Custom or the server ignores the setting
		for this parameter.

In addition, some operating systems, such as Windows 2008, ignore this parameter in favor of their own power plan.

Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5

OL-28893-01 209