Power cap allows user to set a wattage limit on power consumption. When applied on individual node, the node power consumption is capped at assigned level and when applied on chassis, the whole chassis power consumption is capped. When power saving is enabled, individual node or all nodes (chassis level) runs in modes of different throttling level, depending on the modes chosen.
Select Chassis Capping or Nodes Capping from the drop-down menu.
Enter a power cap value, check the box, and click on Apply to enable power capping.
Capping enabled (checked) or disabled (unchecked) can be applied independent of capping value. However, if capping is enabled without any input value, FPC display 0w as default value to represents that no user capping value is specified and no capping is enforced. If a value is entered and applied without enable ticked, the value will be saved but not enforced.
Capping range is suggested to user based on the minimum and maximum possible power consumption of the node/chassis. Any value between 1~ 32767W is still allowed even if the value is not set within the suggested range. A capping value of ‘0w’ is not accepted as user input value since it represents no user value specified.
User entered capping value might not be met if capping value entered is lower than the lower bound of suggested range.
Select enable in the Power Save section and click on Apply to activate power save.
Power save can be applied with power cap simultaneously.
The system runs in a throttled state (defined by the implementation) regardless of the workload.
There are three types of power saving modes and the following table provides details about saving modes.
Table 1. Saving Mode Mode Title Description Supportability Disable Static maximum performance The system runs at full speed (no throttling) regardless of the workload Support Mode 1 Static minimum power The system runs in a throttled state (defined by the implementation) regardless of the workload Support Mode 2 Dynamic favor performance The system adjusts throttling levels based on workload, attempting to favor performance over power savings Not Supported Mode 3 Dynamic favor power The system adjusts throttling levels based on workload, attempting to favor power savings over performance Not Supported