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Power

This menu allows you to configure power scheme options.

Table 1. Power
ItemOptionsDescription
Power/Performance Bias

  • Platform Controlled (Default)

  • OS Controlled

  • PECI Controlled

Power/Performance bias determines how aggressively the processor will be power managed and placed into Turbo. Not all OSes support this feature.

  • [Platform Controlled]: The system controls the setting.

  • [OS Controlled]: The operating system controls the setting.

  • [PECI Controlled]: This option allows BMC to control energy/performance bias.

Note
The option [OS Controlled] is not available when Processor > CPU P-state Control is set to Autonomous.
Platform Controlled Type

  • Performance

  • Balanced Performance (Default)

  • Balanced Power

  • Power

Controls how aggressively the processor’s Power Control Unit (PCU) will engage power management and how the CPU cores are placed into Turbo mode.

  • [Performance]: allows the most aggressive use of Turbo. Power management functions are disabled, thereby increasing power consumption.

  • [Power]: disables Turbo and maximizes the use of power management features.

  • [Balanced Performance] and [Balanced Power] are two intermediate options between [Performance] and [Power], with the former being more inclined to improve performance and the latter being more inclined to reduce power consumption.

When a preset workload profile is selected, this setting is not changeable and is grayed out. To change the setting, select System Settings > Workload Profile > Custom first. Then, you can change this setting.

Workload Configuration

  • Balanced (Default)

  • I/O sensitive

Workload configuration bias is used the tune the system’s I/O bandwidth profile. This setting tunes how aggressively the system will allocate processor core and uncore frequency to handle I/O requests.

  • [Balanced]: CPU core and uncore frequency is balanced to provide equal performance weighting between I/O tasks and application workload threads.

  • [I/O sensitive]: CPU core and uncore frequency is weighted to allocate enough resources to provide high I/O bandwidth when CPU cores are at low utilization.

[I/O sensitive] is recommended for expansion cards that require high bandwidth I/O when the processor cores are idle to allow enough frequency for the workload.

ASPM

  • Auto

  • Disabled(Default)

PCIe Active State Power Management (ASPM) is a PCIe power saving feature. It puts the PCIe link into a low power mode when the link is idle.

  • [Auto]: enables ASPM on PCIe endpoint adapters that support it.

  • [Disabled]: disables ASPM for all PCIe endpoints.

ACPI Fixed Power Button

  • Enabled (Default)

  • Disabled

When the setting is disabled, manually pressing the power button which is located in front of the system won’t execute the Operating System’s Power Button Policy such as shutdown, turn off monitor, etc. In addition, the following options under the BMC Server(Web) Power Actions feature will be disabled:

  • Power off server normally

  • Restart server normally