Friday, February 24, 2012

OS’s scheduler

First-come first-served (FCFS)
Shortest-job next (SJN)
Shortest remaining time (SRT)
Round-robin (RR), quantum = 1
Round-robin (RR), quantum = 5

RR is a preemptive scheduler, which is designed especially for time-sharing systems. In other words, it does not wait for a process to finish or give up control. In RR, each process is given a time slot to run. If the process does not finish, it will “get back in line” and receive another time slot until it has completed.

Scheduling
Round-Robin Scheduling

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