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The KeConvertPerformanceCounterToAuxiliaryCounter routine converts the specified performance counter value into an auxiliary counter value.
Syntax
NTSTATUS KeConvertPerformanceCounterToAuxiliaryCounter(
[in] ULONG64 PerformanceCounterValue,
[out] PULONG64 AuxiliaryCounterValue,
[out, optional] PULONG64 ConversionError
);
Parameters
[in] PerformanceCounterValue
The performance counter value to convert.
[out] AuxiliaryCounterValue
A pointer to the variable that contains the converted auxiliary counter value.
[out, optional] ConversionError
A pointer to a variable that contains the estimated conversion error in units of nanosecond.
Return value
KeConvertPerformanceCounterToAuxiliaryCounter can return one of the following:
Return code | Description |
---|---|
|
The conversion succeeded. |
|
Auxiliary counter is not supported. |
|
The PerformanceCounterValue value is not valid. For example, the value is earlier than the last system boot/recovery, or is out of the +/- 10s range compared to the current performance counter value. |
|
The routine cannot convert the specified value with acceptable accuracy. |
Remarks
Make sure that the specified performance counter value is:
- Within +/- 10s compared to the current performance counter read value.
- Not earlier than the recorded performance counter value at the last system boot or recovery from S3/S4 state.
Requirements
Requirement | Value |
---|---|
Minimum supported client | Available starting with Windows 10. |
Target Platform | Universal |
Header | wdm.h |
Library | Ntoskrnl.lib |
DLL | Hal.dll |
IRQL | Any level |