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PEP_QUERY_CURRENT_COMPONENT_PERF_STATE structure (pepfx.h)

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The PEP_QUERY_CURRENT_COMPONENT_PERF_STATE structure contains information about the current P-state in the specified P-state set.

Syntax

typedef struct _PEP_QUERY_CURRENT_COMPONENT_PERF_STATE {
  PEPHANDLE DeviceHandle;
  ULONG     Component;
  ULONG     Set;
  union {
    ULONG     StateIndex;
    ULONGLONG StateValue;
  };
} PEP_QUERY_CURRENT_COMPONENT_PERF_STATE, *PPEP_QUERY_CURRENT_COMPONENT_PERF_STATE;

Members

DeviceHandle

A PEPHANDLE value that identifies the device. The PEP supplied this handle in response to a previous PEP_DPM_REGISTER_DEVICE notification.

Component

The index that identifies the component. This member is an index into the Components array in the PEP_DEVICE_REGISTER_V2 structure that the PEP previously supplied in response to the PEP_DPM_REGISTER_DEVICE notification for this device. If the Components array contains N elements, component indexes range from 0 to N–1.

Set

The index that identifies this P-state set. If M is the number of P-state sets for this component, P-state set indexes range from 0 to M–1. The PEP previously specified the number of P-state sets in response to a PEP_DPM_QUERY_COMPONENT_PERF_CAPABILITIES notification.

StateIndex

The index of the current P-state for the specified P-state set. Write to this member if the performance values for the P-state set are of type PoFxPerfStateTypeDiscrete.

StateValue

The value of the current P-state for the specified P-state set. Write to this member if the performance values for the P-state set are of type PoFxPerfStateTypeRange.

Remarks

This structure is used by the PEP_DPM_QUERY_CURRENT_COMPONENT_PERF_STATE notification. The DeviceHandle, Component, and Set members contain input values supplied by the Windows power management framework (PoFx) when this notification is sent. The StateIndex member or StateValue member contains an output value that the PEP writes to the structure in response to the notification.

The unnamed union contains the current performance level of this P-state set expressed either as an index into a set of discrete values or as a value in a range. In response to a previous PEP_DPM_QUERY_COMPONENT_PERF_SET notification, the PEP indicated whether the performance values in the P-state set are of type PoFxPerfStateTypeDiscrete or PoFxPerfStateTypeRange.

Requirements

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

See also