100 OUT UINT64 *StartValue OPTIONAL,
101 OUT UINT64 *EndValue OPTIONAL
UINT64 EFIAPI GetPerformanceCounterProperties(OUT UINT64 *StartValue OPTIONAL, OUT UINT64 *EndValue OPTIONAL)
UINT64 EFIAPI GetTimeInNanoSecond(IN UINT64 Ticks)
UINT64 EFIAPI GetPerformanceCounter(VOID)
UINTN EFIAPI MicroSecondDelay(IN UINTN MicroSeconds)
UINTN EFIAPI NanoSecondDelay(IN UINTN NanoSeconds)