User's Manual

DescriptionName
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.
must be set to Custom or the server ignores the setting
for this parameter.
Note
P-STATE Coordination
Allows you to determine whether system performance or energy
efficiency is more important on this server. This can be one of
the following:
•
•
•
•
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.
Note
Energy Performance
Cisco UCS C-Series Servers Integrated Management Controller CLI Configuration Guide, Release 1.5
190 OL-28893-01
BIOS Parameters by Server Model
Advanced BIOS Parameters for C22 and C24 Servers