CDN PT2 4-Event Timer & Clock Digital Timer, White

Product Information

Even if a data point meets the criteria for an incident, an incident may not be opened. An incident is only opened when data points consistently meet the threshold criteria over a period of time. This is the threshold duration. If the data points exceed for an entire threshold duration, we'll send you a notification based on your policy settings. Operating systems designed before HPET existed cannot use HPET, so they use other timer facilities. Newer operating systems tend to be able to use either. Some hardware has both. Indeed, most current southbridge chips have legacy-supporting instances of PIT, PIC, Advanced Programmable Interrupt Controller (APIC) and RTC devices incorporated into their silicon whether or not they are used by the operating system, which helps very modern PCs run older operating systems.

While it is true to say that only Windows Vista and later Windows use the physical Intel 15MHz HPET, the operating system features intended to be fulfilled by the HPET already largely existed in Windows XP, albeit to a different specification (that of 2002 rather than 2005) and hence with a reduced capability.XP SP3 "emulates" most of the HPET specification as drafted in 2002 in anticipation of a device that made its eventual appearance in PCs designed for Windows Vista by 2005. Sound: If you want to change the timer expiry sound, open up this section and choose a different sound.

For example, suppose you're monitoring CloudWatch data that arrives fairly infrequently. You're using a window duration of 1 minute and a 3 minute timer. For best results, make sure your timer is equal to or longer than your window duration time. If the timer is less than your window duration and your data flow is inconsistent, then your data may be evaluated before all of your data points arrive. This could cause you to be notified incorrectly. Cadence Streaming alerts provide a set of tools to give you greater control over how your data is aggregated before it's evaluated to reduce incorrect notifications you receive. They are: The HPET specification does not define the timer frequency, only requiring a minimum of 10MHz; the actual frequency is provided to the operating system by a hardware register giving the number of femtoseconds per period (with an upper bound of 100 000 000fs). A popular value is 14.3 18MHz, 12 times the standard 8254 frequency of 1.193 18MHz.

Create Countdown to Event

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.