How to Optimize Interrupt Latency in Embedded Systems - Interview Question

Interrupt latency is a critical factor in the performance and responsiveness of embedded systems. To optimize interrupt latency, consider the following strategies:

1. Minimize Interrupt Service Routine (ISR) Execution Time: Write efficient and concise ISR code to minimize the time it takes to handle interrupts.
2. Disable Interrupts Temporarily: Disable interrupts during critical sections of code to prevent interruptions and reduce latency.
3. Use Priority Levels: Assign priority levels to interrupts to ensure that higher-priority interrupts are served first, reducing overall latency.
4. Optimize Hardware and Software Design: Design your hardware and software with interrupt latency in mind, making efficient use of resources to minimize delays.
5. Use Hardware Accelerators: Utilize hardware accelerators and dedicated interrupt controllers to speed up interrupt handling and reduce latency.

By implementing these strategies, you can effectively optimize interrupt latency in embedded systems, improving system performance and responsiveness.