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PEP_PPM_QUERY_CAPABILITIES structure (pepfx.h)

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The PEP_PPM_QUERY_CAPABILITIES structure contains information about the processor power management (PPM) capabilities of the platform extension plug-in (PEP).

Syntax

typedef struct _PEP_PPM_QUERY_CAPABILITIES {
  ULONG   FeedbackCounterCount;
  ULONG   IdleStateCount;
  BOOLEAN PerformanceStatesSupported;
  BOOLEAN ParkingSupported;
  UCHAR   DiscretePerformanceStateCount;
  UCHAR   Reserved;
} PEP_PPM_QUERY_CAPABILITIES, *PPEP_PPM_QUERY_CAPABILITIES;

Members

FeedbackCounterCount

The number of processor performance feedback counters supported by the PEP for this processor. On x86/AMD64 platforms, this must be zero.

IdleStateCount

The number of processor idle states that the PEP supports. The PEP is not required to support the same number of idle states for all processors. The PEP can set IdleStateCount = 0 to indicate that it doesn't support any idle states, in which case the PEP doesn't need to implement any other notifications that deal with processor idle states.

PerformanceStatesSupported

Whether the PEP supports performance state controls. Set to TRUE if the PEP supports performance states, or to FALSE if it does not.

ParkingSupported

Whether the PEP supports supplying core parking hints. Set to TRUE if the PEP can indicate which cores to park, or to FALSE if it cannot.

DiscretePerformanceStateCount

The number of discrete performance states that the PEP supports.

Reserved

Reserved for future use. Set to zero.

Remarks

This structure is used by the PEP_NOTIFY_PPM_QUERY_CAPABILITIES notification. All four members contain output values that the PEP writes to the structure in response to this notification.

Requirements

Requirement Value
Minimum supported client Supported starting with Windows 10.
Header pepfx.h (include Pep_x.h)

See also