PROCESSOR_POWER_POLICY structure (winnt.h)

Contains information about processor performance control and C-states.

Syntax

typedef struct _PROCESSOR_POWER_POLICY {
 DWORD Revision;
 BYTE DynamicThrottle;
 BYTE Spare[3];
 DWORD DisableCStates : 1;
 DWORD Reserved : 31;
 DWORD PolicyCount;
 PROCESSOR_POWER_POLICY_INFO Policy[3];
} PROCESSOR_POWER_POLICY, *PPROCESSOR_POWER_POLICY;

Members

Revision

The current structure revision level. Set this value by calling ReadProcessorPwrScheme before using a PROCESSOR_POWER_POLICY structure to set power policy.

DynamicThrottle

The current processor performance state policy. This member must be one of the values described in Processor Performance Control Policy Constants.

Spare[3]

Reserved; set to zero.

DisableCStates

Reserved; set to zero.

Reserved

Reserved; set to zero.

PolicyCount

The number of elements in the Policy array.

Policy[3]

An array of PROCESSOR_POWER_POLICY_INFO structures that defines values used to apply processor C-state policy settings. Policy[0] corresponds to ACPI C-state C1, Policy[1] corresponds to C2, and Policy[2] corresponds to C3. The AllowPromotion member determines whether the processor can be promoted to the state. For example, if Policy[0].AllowPromotion is 0, the computer cannot transition from C0 to C1.

Requirements

See also

CallNtPowerInformation

PROCESSOR_POWER_POLICY_INFO