What is dynamic scheduler?

A dynamic scheduler is an operating system component responsible for scheduling the execution of processes/threads on a multi-core processor. Unlike a static scheduler, a dynamic scheduler is designed to adjust its scheduling policy based on the current execution environment, such as the number of available CPU cores, the workload distribution, and the priority of the processes.

The dynamic scheduler uses various algorithms to allocate CPU time to processes, including round-robin, priority-based, and fair-share scheduling. These algorithms ensure that the operating system can respond to various workloads efficiently. Additionally, the dynamic scheduler can migrate threads between processors in a multi-core environment, which maximizes CPU utilization and improves performance.

The dynamic scheduling algorithm is responsive to the changes in the system state like CPU and I/O usage, available memory, and completion of processes. It tries to minimize the waiting time of the processes that are ready to execute and maximize the overall throughput of the system. The dynamic scheduler is prevalent in modern operating systems and is an essential component for efficient multi-tasking and high-performance computing.