HARDWARE_COUNTER structure (ntddk.h)
The HARDWARE_COUNTER structure contains information about a hardware counter.
Syntax
typedef struct _HARDWARE_COUNTER {
HARDWARE_COUNTER_TYPE Type;
ULONG Reserved;
ULONG64 Index;
} HARDWARE_COUNTER, *PHARDWARE_COUNTER;
Members
Type
Specifies the type of the hardware counter. Set this member to the following HARDWARE_COUNTER_TYPE enumeration value:
- PMCCounter
Reserved
Reserved for use by the operating system. Initialize this member to zero.
Index
Specifies the hardware counter index. Each hardware counter in a performance monitoring unit (PMU) for a processor is identified by an index.
Remarks
This structure is used by the KeQueryHardwareCounterConfiguration and KeSetHardwareCounterConfiguration routines.
The Type member specifies the type of hardware counter that is described by the structure. In Windows 7, the only defined hardware counter type is PMCCounter, which is a performance monitor counter. This type of counter is used by thread-profiling applications.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Supported in Windows 7 and later versions of Windows. |
| Header | ntddk.h (include Ntddk.h) |