Power calibration calculations, Determining idle/max values for non-blade servers, Determining idle/max values for blade servers – HP Matrix Operating Environment Software User Manual
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Power calibration calculations
Manual calibration uses CPU utilization data to estimate power utilization. Power utilization can
be estimated by looking at CPU utilization because power utilization is closely related to CPU
utilization. Further, the greater the CPU usage, the more power that is required to run and cool the
system.
Within the power calibration screens, you can specify the idle and maximum power usage values
that you want to use for power usage calculations. The values can be determined by checking
model and hardware configuration information. For your convenience, HP provides power
calculators to aid you in this process (noted below). Each power calculator allows for different
hardware configurations, such as amount of processors and memory, in order to yield the most
accurate results.
IMPORTANT:
Values given by these power calculators are only estimates. Actual results can vary
depending on application load, ambient temperature, and other factors.
Determining idle/max values for non-Blade servers
1.
Locate the appropriate power calculator for a given model number.
a.
Download the power calculators in spreadsheet form for older HP Proliant DL/ML/PL
servers:
For newer Proliant systems...:
Use the HP Power Advisor described at this web site:
b.
Download the power calculators in spreadsheet form for HP Integrity servers (rx* and
Superdome) by visiting “HP Thermal Logic for Integrity servers” web page:
2.
Configure the power calculator to match your desired hardware configuration.
3.
Determine idle/max values for manual calibration by locating the Total System Input Power
Requirement. This value is always in Watts unless otherwise indicated.
a.
If a system utilization slider bar is present, the user can determine both the max and idle
power requirements by adjusting the slider bar.
1)
The idle power value is determined by adjusting the system utilization slider bar to
0% usage, and reading the value of Total System Input Power Requirement.
2)
The max power value is determined by adjusting the system utilization slider bar to
100% usage, and reading the value of Total System Input Power Requirement.
b.
If no slider bar is present, then only the maximum power value can be determined.
1)
Use the indicated Total System Input Power Requirement as the Max power
requirement in the power calibration screen.
2)
Leave the Idle power requirement blank in the power calibration screen. Capacity
Advisor will automatically use 80% of the provided Max power requirement as the
assumed idle value.
Determining idle/max values for Blade servers
An HP Blade System has a distributed power architecture, which makes it difficult to determine
idle/max values for an individual blade. A single blade’s power usage depends on rack
configuration and the power consumption of other blades within an enclosure.
For HP Blades with Integrated Lights-Out, it is recommended not to use Manual Calibration. Auto
Calibration using actual observed power consumption of an individual blade (from Insight Control
power management) is more accurate than manual calibration in this situation.
130 Calculation assistance