Since the original specification for HPET (in 2002) calls for a high resolution counter, which is then exposed by the QueryPerformanceFrequency and QueryPerformanceCounter API calls (already available since Windows 2000), it is the QueryPerformanceFrequency that can shed light on how this "high precision" counter is actually being provided. A specific duration that determines if an incident is created. If your specified NRQL condition meets the threshold criteria over the threshold duration, an incident occurs. While 8254 and RTC can be put into an HPET-like one-shot mode, the set-up process is so slow that their one-shot mode is not used in practice for tasks requiring precise scheduling. [4] Instead, 8254 and RTC are typically used in periodic mode with a very small time interval. For example, if an application needs to perform several short (some milliseconds, perhaps) waits, it is better to have a periodic timer running constantly with a 1ms period because of the high setup cost of an 8254 or RTC one-shot timer. This causes an interrupt at every millisecond even if the application needs to do actual work less frequently. With HPET, the extra interrupts can be avoided, because the set-up cost of a HPET one-shot timer is considerably smaller.

The delay default is 2 minutes. The timer default is 1 minute and has a minimum value of 5 seconds. Loss of signal detectionMaguuma Pact Operation Portal Device— a Gem Store item that announces the occurrence of meta events within the Heart of Maguuma and instant teleportation to their locations. If you need to pause or resume the timer, you need to hover your mouse over the timer to get such options. This section needs expansionwith: compare with LAPIC timer, ACPI PM etc.. You can help by adding to it. ( February 2014)

Understanding how streaming alerts works will help you fine-tune your NRQL conditions to be notified about what's important to you. Each comparator can generate an interrupt when the least significant bits are equal to the corresponding bits of the 64-bit main counter value. The comparators can be put into one-shot mode or periodic mode, with at least one comparator supporting periodic mode and all of them supporting one-shot mode. In one-shot mode the comparator fires an interrupt once when the main counter reaches the value stored in the comparator's register, while in the periodic mode the interrupts are generated at specified intervals. With or without the /PMTIMER switch, the "event" part of the HPET specification can only be emulated by using yet another timing source, since neither an underlying TSC nor PMTIMER solution includes implicit hardware for aperiodic event triggering as described by the specification, and yet this is available via the timer API in Windows XP (to a best possible resolution of 0.9766ms when the timeBeginPeriod - timeEndPeriod API calls are used). This part of the specification is still fulfilled by the RTC device with the help of software, despite the fact that the device manager is quoting HPET in the IRQ0 and IRQ8 positions.TIMEOUT. Timeout has been reached and a well visible red screen will appear! This has been tested to stop speakers, much better than if the screen would not change colour into such obvious one. When a CloudWatch data point comes in with a timestamp between 12:00pm and 12:01pm, the timer will start to count down. If no further data points show up for that 12:00-12:01 window, the window will get aggregated 3 minutes later. There are several other features and options, but you need to start using this tool to get them all. The term "High Precision Event Timer" is then used within the driver manager to describe TSC (Time-Stamp-Counter) or ACPI Power Management Timer (PMTimer) timing subsystems even when the 15MHz Intel HPET device is not being used. This article covers these tools at a conceptual level. You'll find direct instructions on how to use these tools in Create NRQL alert conditions. Window duration