Advanced Configuration and Power Interface Specification

Advanced Configuration and Power Interface Specification
Return Value:
A Package containing the performance control information
The performance control package contains the elements described below:
Package
{
}
NumEntries,
Revision,
HighestPerformance,
NominalPerformance,
LowestNonlinearPerformance,
LowestPerformance,
GuaranteedPerformanceRegister,
DesiredPerformanceRegister,
MinimumPerformanceRegister,
MaximumPerformanceRegister,
PerformanceReductionToleranceRegister,
TimeWindowRegister,
CounterWraparoundTime,
ReferencePerformanceCounterRegister,
DeliveredPerformanceCounterRegister,
PerformanceLimitedRegister,
CPPCEnableRegister
AutonomousSelectionEnable,
AutonomousActivityWindowRegister,
EnergyPerformancePreferenceRegister,
ReferencePerformance
// Integer
// Integer
// Integer or Buffer (Resource Descriptor)
// Integer or Buffer (Resource Descriptor)
// Integer or Buffer (Resource Descriptor)
// Integer or Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Integer or Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Integer or Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Buffer (Resource Descriptor)
// Integer or Buffer (Resource Descriptor)
Table 8-250 Continuous Performance Control Package Values
Element
Object Description
Type
NumEntries Integer The number of entries in the _CPC package, including this one.
Current value is 21.
Revision
Integer
(BYTE)
The revision number of the _CPC package format. Current value is 2.
Highest Performance
Nominal Performance
Lowest Nonlinear
Performance
Integer
(DWORD)
or Buffer
Integer
(DWORD)
or Buffer
Integer
(DWORD)
or Buffer
Indicates the highest level of performance the processor is
theoretically capable of achieving, given ideal operating conditions. If
this element is an Integer, OSPM reads the integer value directly. If
this element is a Buffer, it must contain a Resource Descriptor with a
single Register() to read the value from.
Indicates the highest sustained performance level of the processor. If
this element is an Integer, OSPM reads the integer value directly. If
this element is a Buffer, it must contain a Resource Descriptor with a
single Register() to read the value from.
Indicates the lowest performance level of the processor with nonlinear
power savings. If this element is an Integer, OSPM reads the
integer value directly. If this element is a Buffer, it must contain a
Resource Descriptor with a single Register() to read the value from.
478 April, 2015 Version 6.0