What is iee scheduler?

The IEE scheduler, or Interval Election and Execution scheduler, is a scheduling algorithm used in real-time embedded systems that require strict timing guarantees. The main objective of the IEE scheduler is to provide a periodic scheduling policy that ensures that tasks execute at their required time intervals, with minimal overhead and without any overrun.

The IEE scheduler works by dividing the execution time of the system into a number of fixed intervals of equal duration. Each task has an associated interval, and tasks execute only during their assigned interval. If a task cannot be completed within its assigned interval, it is either interrupted or preempted, and its execution is resumed during the next interval.

The IEE scheduler is known for its simplicity and efficiency. It does not require complex algorithms for scheduling, and the overhead of the scheduler is minimal. It also provides guaranteed response times, making it suitable for real-time systems.

However, the IEE scheduler has some limitations. It assumes that all tasks have equal priority and does not support dynamic prioritization. It also does not provide support for synchronization between tasks or handling of priority inversion problems. Therefore, it is not suitable for all types of real-time systems.