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FusionServer Pro Rack Server iBMC (V260 to V278) User Guide 15
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Energy Saving Settings

Energy Saving Settings

Function Description

The Energy Saving Settings page allows you to adjust the P-states (CPU operating frequency) and T-states (CPU duty cycle) to reduce power consumption.

Energy saving settings may affect system performance. Exercise caution when configuring energy saving settings.

Before adjusting the server power, ensure that the following parameters are set on the BIOS:

  • EIST Support or EIST is set to Enabled.
  • ACPI 3.0 T-States is set to Enabled for a V2 server on the Romley platform.
  • ACPI T-States is set to Enabled for a V3 server on the Brickland platform. (ACPI T-States is unavailable for a V3 server on the Grantley platform.)
  • Software Controlled T-States is set to Enabled and T-State Throttle Level to the default value Disabled for a V5 server on the Purley platform.

GUI

Choose Power from the main menu, and select Energy Saving Settings from the navigation tree.

The Energy Saving Settings page is displayed.

The Energy Saving Settings area consists of two sections: Power Adjustment and PSU settings.

Figure 3-18 Energy Saving Settings page of the RH8100 V3
Figure 3-19 Energy Saving Settings page of other rack servers

Parameter Description

Table 3-37 Parameters in the Power Adjustment section

Parameter

Description

CPU Operating Frequency

Drag the slider bar to adjust the CPU operating frequency (P-states).

The number of P-states varies according to the CPU model. P0 is the maximum value. A larger P-state value indicates a lower CPU operating frequency, and thereby lower power consumption.

NOTE:
  • If the actual server power exceeds the power cap value after the P-state and T-state are adjusted, the P-state and T-state values will be automatically adjusted to the normal values.
  • Before setting this parameter, ensure that the OS has started. Otherwise, the setting cannot take effect.

CPU Duty Cycle

Drag the slider bar to adjust the CPU duty cycle (T-states).

The number of T-states varies according to the CPU model. T0 is the maximum value. A larger T-state value indicates a lower CPU duty cycle, and thereby lower power consumption.

NOTE:
  • If the actual server power exceeds the power cap value after the P-state and T-state are adjusted, the P-state and T-state values will be automatically adjusted to the normal values.
  • Before setting this parameter, ensure that the OS has started. Otherwise, the setting cannot take effect.
Table 3-38 Parameters in PSU settings (not for the RH8100 V3)

Parameter

Description

Actual PSU Status

System Power

Current server power.

PSU Power

Current power of all power supply units (PSUs) in the server.

Work Mode

Current PSU working mode.

Active PSU

Active PSUs.

NOTE:

If Work Mode is set to Load Balancing, all detected PSUs are displayed.

Predicted PSU Status

Work Mode

PSU working mode.

Value:

  • Load Balancing: Multiple PSUs simultaneously supply power to the system and share the system power consumption.

    This mode provides a high power supply capability for the entire system and has minor impact on the standby PSUs if one PSU is faulty. However, the PSUs in this mode have low power supply efficiency and consume more electricity.

  • Active/Standby: One or more active PSUs supply power to the system, and the other PSUs are in standby state.

    This mode provides a higher power supply efficiency and less power consumption, and extends the PSU service life. However, it has a lower power supply capability.

Default value: Load Balancing

NOTE:
  • When the system power consumption is low, select Active/Standby to decrease server power consumption.
  • If the system power consumption is greater than or equal to 75% of the power ratings of the active PSUs, the PSU working mode automatically changes to Load Balancing.
  • Currently the active/standby mode (1+1 redundancy) can be used only when two PSUs are configured.

Active PSU

Active PSUs.

Hibernate
NOTICE:

After deep hibernation is enabled and the server is powered off, if all active PSUs are removed or stop outputting power due to faults, the entire server loses power for about 10 seconds and then the PSUs in deep hibernation mode automatically turn on to output power.

Specifies whether deep hibernation is enabled. If deep hibernation is enabled, certain PSUs enter the deep hibernation mode and stop outputting power when the server is powered off. When the server is powered on, the PSUs in deep hibernation mode continue to output power.

Click or , and click Save.

  • : enables deep hibernation. The setting takes effect when the OS is powered off.
  • : disables deep hibernation. The setting takes effect when the OS is powered off.
NOTE:
  • The deep hibernation setting is available only for the 1288H V5, 2288H V5, 2488 V5, 2488H V5, and 5885H V5 servers.
  • If deep hibernation is enabled, the PSUs will be in hibernation after the OS is powered off.

Procedure

Configuring CPU Energy Saving Policy

  1. On the menu bar, choose Power.

  2. In the navigation tree, choose Energy Saving Settings.

    The Energy Saving Settings page is displayed.

  3. Drag the slider bar to adjust the CPU operating frequency or duty cycle.

    For details about the parameters, see Table 3-37.

    • Drag one slider bar at a time.
    • Adjusting the maximum CPU operating frequency has greater impact on power consumption and smaller impact on system performance than adjusting the CPU duty cycle. Therefore, adjust the maximum CPU operating frequency first.

  4. Click Save.

    The following information is displayed:

    Are you sure you want to perform this operation?

  5. Click Yes.

    If "Operation Successful" is displayed, the setting is complete.

Setting the PSU Working Mode (Unsupported by RH8100 V3)

  1. On the menu bar, choose Power.

  2. In the navigation tree, choose Energy Saving Settings.

    The Energy Saving Settings page is displayed.

  3. In the Predicted PSU Status area, set the PSU working mode and active PSU and whether to enable deep hibernation.

    For details about the parameters, see Table 3-38.

    • The deep hibernation setting is available only for the 1288H V5, 2288H V5, 2488 V5, 2488H V5, and 5885H V5 servers.
    • If deep hibernation is enabled, the PSUs will be in hibernation after the OS is powered off.
  4. Click Save.

    The following information is displayed:

    Are you sure you want to perform this operation?
  5. Click Save.

    If "Operation Successful" is displayed, the setting is complete.

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Updated: 2020-11-18

Document ID: EDOC1000177670

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