HP Insight Control Power Management 6.2 User Guide

• The Power Switch action is implemented with a mix of SSA tool invocations, as with Shutdown above;
and calls to the Power State action, as described above.
• The Run Script action runs scripts on the CMS as the Administrator/root user (that is, the user running
the Systems Insight Manager CMS process).
Power Regulator
HP Power Regulator for ProLiant
HP Power Regulator for ProLiant is a hardware feature that enables ProLiant servers to control performance
states (p-states) of the system processors. Insight Control power management monitors and uses HP Power
Regulator technology.
• CPU frequency: A lower p-state causes the CPU to operate at a lower frequency. For example, a
3.773 GHz processor might operate at 3.0 GHz in a lower p-state.
• CPU voltage: A lower p-state causes the CPU to operate at a lower level of voltage. For example, a
CPU operating at 1.4v at maximum p-state might operate at 1.2v in the minimum p-state.
Power Regulator operates in four modes:
• HP Static Low Power Mode. Power Regulator keeps the CPU in the lowest supported power state.
This mode saves maximum resources, but it might affect system performance if processor utilization
stays at or above 75% utilization.
• HP Static High Performance Mode. Power Regulator keeps the CPU in the highest supported power
state. This mode ensures maximum performance, but it does not save any resources. This mode is useful
for creating a baseline of power consumption data without Power Regulator.
• HP Dynamic Power Savings Mode. Power Regulator sets the processors to the appropriate power
level based on the utilization of each CPU core during the last 1/8 second. The CPU is set to the power
saving p-state if the CPU utilization can be maintained at the slower CPU frequency. The CPU is set to
the maximum performance p-state if the CPU utilization requires the fastest CPU frequency.
The point at which Power Regulator shifts from the minimum p-state to the maximum p-state varies based
on the processor installed in the system. A 3.773 GHz CPU that has a 3.0 GHz minimum p-state
frequency switches modes at around 75% utilization. A 3.2 GHz CPU that has a 3.0 GHz minimum
p-state frequency switches modes at around 88% utilization.
• OS Control Mode. Power Regulator configures the system to enable the operating system to control
the p-states. Moving from this state to any of the three previous states requires a system reboot.
NOTE: On ProLiant G5 systems equipped with AMD processors, setting Power Regulator for ProLiant to
HP Static Low Power mode will defeat any power cap setting. HP recommends that Power Regulator for
ProLiant be set to HP Dynamic Power Savings mode.
HP Power Regulator modes such as Static Low Power Mode, Static High Performance Mode and Dynamic
Power Savings Mode work for any operating system. The OS Control Mode requires Microsoft Windows
Server 2003 SP1 or later or Red Hat Linux 4 Update 2 or later.
For more information on supported processors, see http://www.hp.com/servers/power-regulator.
HP Power Regulator for Integrity
Although power monitoring operates independently of the operating system, HP Power Regulator for Integrity
requires a compliant operating system version. Consult operating system documentation for details on power
management support for your system. Power regulation also requires p-state capable hardware.
Power Regulator for Integrity operates in four modes:
• HP Static Low Power Mode. Power Regulator for Integrity sets the processors to the power-performance
state (p-state) with the lowest power consumption and forces them to stay in that state. This mode saves
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