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PEP_PROCESSOR_IDLE_DEPENDENCY structure (pepfx.h)

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The PEP_PROCESSOR_IDLE_DEPENDENCY structure specifies the dependencies of a platform idle state on the specified processor.

Syntax

typedef struct _PEP_PROCESSOR_IDLE_DEPENDENCY {
  POHANDLE TargetProcessor;
  UCHAR    ExpectedState;
  BOOLEAN  AllowDeeperStates;
  BOOLEAN  LooseDependency;
} PEP_PROCESSOR_IDLE_DEPENDENCY, *PPEP_PROCESSOR_IDLE_DEPENDENCY;

Members

TargetProcessor

A POHANDLE value that identifies the processor. The platform extension plug-in (PEP) received this handle in a previous PEP_DPM_REGISTER_DEVICE notification.

ExpectedState

The index of the processor idle state that this processor must enter to initiate the platform's transition to this platform idle state. If the IdleStates array in the PEP_PPM_QUERY_IDLE_STATES_V2 structure contains N elements, the idle states are numbered 0 to N-1 in the order in which they appear in the array.

AllowDeeperStates

Whether a secondary (subordinate) processor can be in a deeper processor idle state than ExpectedState and still satisfy the constraints of the transition to the platform idle state. Set this member to TRUE if a secondary processor in a deeper idle state can still satisfy the constraints, and to FALSE if it cannot. A primary processor (identified by the TargetProcessor member) can enter the selected idle state only after its secondary processors have entered their corresponding idle states.

LooseDependency

Whether the platform idle state has a loose dependency on the idle state of this processor. Set this member to TRUE to indicate a loose dependency in which a best effort to synchronize the idle state transitions of the platform and processor is sufficient. Set to FALSE to indicate a dependency in which the operating system is required to strictly synchronize these transitions. If LooseDependency is FALSE, the WakesSpuriously bit in the PEP_PROCESSOR_IDLE_STATE_V2 structure for this processor must be FALSE.

Remarks

The DependencyArray member of the PEP_PPM_IDLE_SELECT structure is a pointer to an array of PEP_PROCESSOR_IDLE_DEPENDENCY structures. The DependencyArray member of the PEP_PLATFORM_IDLE_STATE structure is the first element in an array of PEP_PROCESSOR_IDLE_DEPENDENCY structures.

Requirements

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

See also

PEP_DPM_REGISTER_DEVICE

PEP_PLATFORM_IDLE_STATE

PEP_PPM_IDLE_SELECT

PEP_PPM_QUERY_IDLE_STATES_V2

PEP_PROCESSOR_IDLE_STATE_V2