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Different thinking leads to different Scheduler designs. If we want to proportionally distribute CPU resources, we have the Lottery Scheduler and Stride Scheduler. Another approach is to evenly distribute CPU resources to all processes, which led us to develop the Completely Fair Scheduler.

The Multi-level Feedback Queue (MLFQ) is a design that balances turnaround time and response time.

Different Schedulers have their strengths and weaknesses, and one should choose a Scheduler based on the specific scenario.

The Limited Direct Execution Protocol requires processes to have permissions to perform system-level operations.

Operating systems provide many system calls to create or manage processes.