What is Interrupt latency?
Interrupt latency is the time that elapses between the occurrence of an interrupt and the execution of the first instruction of the interrupt service routine (ISR) that handles the interrupt.
- It is a measure of the system’s ability to respond to external events in a timely manner.
- The shorter the interrupt latency, the more responsive the system will be.
- Interrupt latency is expressed in core clock cycles.
What is Interrupt Latency?
Interrupt latency is a measure of the time it takes for a computer system to respond to an external event, such as a hardware interrupt or software exception. This metric is important in determining the performance and responsiveness of a system and is a key consideration in the design and optimization of real-time and embedded systems. In this article, we will discuss the concept of interrupt latency, its importance, and some of the factors that can affect interrupt latency.
The article focuses on discussing Interrupt latency in detail. The following topics will be discussed here:
- What is Interrupt?
- What is Interrupt Latency?
- Cause of Interrupt Latency
- Arm Cortex-M Interrupt Latency
- Measuring Interrupt Latency
- Conclusion
Let’s start discussing each of these topics in detail.