#ifndef _NTEXAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtQueryIntervalProfile(
    _In_ KPROFILE_SOURCE ProfileSource,
    _Out_ PULONG Interval
    );

#endif
#endif
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#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwQueryIntervalProfile(
    _In_ KPROFILE_SOURCE ProfileSource,
    _Out_ PULONG Interval
    );

#endif
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Function NtQueryIntervalProfile retrieves currently set delay between performance counter's ticks. See also description of NtSetIntervalProfile function.

ProfileSource

Performance counter identifier defined in KPROFILE_SOURCE enumeration type.

Interval

Pointer to ULONG value receiving current interval, in ms. If received value is zero, counter specified in ProfileSource parameter is hardware counter (performance counter build in CPU).

Documented by

Tomasz Nowak