StorPortQueryPerformanceCounter - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// storport.h

ULONG StorPortQueryPerformanceCounter(
  [in]            PVOID          HwDeviceExtension,
  [out, optional] PLARGE_INTEGER PerformanceFrequency,
  [out]           PLARGE_INTEGER PerformanceCounter
);
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nf-storport-storportqueryperformancecounter)

StorPortQueryPerformanceCounter function

Description

The current system performance counter value is queried is returned by the StorPortQueryPerformanceCounter routine.. The performance frequency is also returned as an optional parameter.

Parameters

HwDeviceExtension [in]

A pointer to the hardware device extension for the host bus adapter (HBA).

PerformanceFrequency [out, optional]

A pointer to a large integer to receive the current system performance frequency value. This parameter is optional and can be NULL.

PerformanceCounter [out]

A pointer to a large integer to receive the current system performance counter value.

Return value

StorPortQueryPerformanceCounter returns one of the following status codes:

Return code Description
STOR_STATUS_SUCCESS The performance counter value is returned in the large integer pointed to by PerformanceCounter.
STOR_STATUS_INVALID_PARAMETER The PerformanceCounter parameter is NULL.

See also

StorPortQuerySystemTime

View the official Windows Driver Kit DDI reference

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