HP ProLiant BL660c HP Power Regulator for ProLiant servers - Page 2

Introduction, Processor P-states, Power Regulator technology, HP Power Regulator modes

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Introduction Enterprise servers can place large demands on facility power and cooling resources. In some cases, facility power and cooling constraints can delay IT purchases. HP Power Regulator gives you a tool to increase server efficiency and free up cooling and power resources. This lets you use power/cooling resources where you need them the most. It lets you manage processor power consumption and system performance to meet your business needs. Processor P-states Server processors from Intel and AMD have performance state registers that can switch a processor between different performance states (P-states). Through HP Power Regulator technology, HP firmware or the OS can access and change the P-states. Changing the performance state (the processor frequency and voltage) directs processors to operate at different power levels. This gives you some control over total system power consumption. Tables 1 and 2 show examples of P-states for Intel® Xeon® and AMD™ Opteron™ processors. Table 1. P-states of the Quad-core Intel Xeon 5670 2.93-GHz processor P-state Description Core Frequency Pmax Pmin Maximum performance Minimum power 2.93 GHz 1.6 GHz Table 2. P-states of the AMD Opteron 6174 2.2-GHz processor P-state Description Core Frequency Pmax Pmin Maximum performance Minimum power 2.2 GHz 800 MHz Power Regulator technology HP Power Regulator is an OS-independent power management feature of HP ProLiant servers. It is included on all HP ProLiant servers (200-series and above). Processor power and performance state registers exposed by processor vendors let you use Power Regulator to control processor power usage and performance. Power Regulator directly adjusts the frequency and core voltage of ProLiant server processors. Using Power Regulator, you can configure a server to maximize performance, maximize power savings, or match processor power consumption dynamically as system load changes. This lets you maintain an optimal balance of performance and power utilization under all operating conditions. HP Power Regulator modes You can configure Power Regulator for any of four operating modes: • HP Static High Performance mode 2

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Introduction
Enterprise servers can place large demands on facility power and cooling resources. In some cases,
facility power and cooling constraints can delay IT purchases. HP Power Regulator gives you a tool to
increase server efficiency and free up cooling and power resources. This lets you use power/cooling
resources where you need them the most. It lets you manage processor power consumption and
system performance to meet your business needs.
Processor P-states
Server processors from Intel and AMD have performance state registers that can switch a processor
between different performance states (P-states). Through HP Power Regulator technology, HP firmware
or the OS can access and change the P-states.
Changing the performance state (the processor frequency and voltage) directs processors to operate
at different power levels. This gives you some control over total system power consumption. Tables 1
and 2 show examples of P-states for Intel® Xeon® and AMD™ Opteron™ processors.
Table 1.
P-states of the Quad-core Intel Xeon 5670 2.93-GHz processor
P-state
Description
Core Frequency
Pmax
Maximum performance
2.93 GHz
Pmin
Minimum power
1.6 GHz
Table 2.
P-states of the AMD Opteron 6174 2.2-GHz processor
P-state
Description
Core Frequency
Pmax
Maximum performance
2.2 GHz
Pmin
Minimum power
800 MHz
Power Regulator technology
HP Power Regulator is an OS-independent power management feature of HP ProLiant servers. It is
included on all HP ProLiant servers (200-series and above).
Processor power and performance state registers exposed by processor vendors let you use Power
Regulator to control processor power usage and performance. Power Regulator directly adjusts the
frequency and core voltage of ProLiant server processors.
Using Power Regulator, you can configure a server to maximize performance, maximize power
savings, or match processor power consumption dynamically as system load changes. This lets you
maintain an optimal balance of performance and power utilization under all operating conditions.
HP Power Regulator modes
You can configure Power Regulator for any of four operating modes:
•
HP Static High Performance mode