Prerequisite:Round Robin Scheduling with arrival time as 0
Round-robin Scheduling algorithm (RR) is designed especially for a time-sharing system.It is similar to FCFS scheduling, but preempted is added to switch between processes.A small unit of time called a time quantum is defined.a time quantum is generally from 10 to 100 milliseconds.The CPU scheduler goes around the ready queue, allocating the CPU to each process for a time interval of up to 1. Round Robin is a CPU scheduling algorithm where each process is assigned a fixed time slot in a cyclic way. It is simple, easy to implement, and starvation-free as all processes get fair share of CPU. One of the most commonly used technique in CPU scheduling as a core.
Round robin scheduling algorithm is used to schedule process fairly each job a time slot or quantum and the interrupting the job if it is not completed by then the job come after the other job which are arrived in the quantum time that make these scheduling fairly
Note:
Advantages:
Disadvantages:
Quantum time is 3 this means each process is only executing for 3 units of time at a time.
How to compute these process requests:-
After all these we get the three times which are:
How to implement in programming language
Below is the implementation of the above approach:
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Round Robin is a CPU scheduling algorithm where each process is assigned a fixed time slot in a cyclic way.
Illustration:
How to compute below times in Round Robin using a program?
In this post, we have assumed arrival times as 0, so turn around and completion times are same.
The tricky part is to compute waiting times. Once waiting times are computed, turn around times can be quickly computed.
Steps to find waiting times of all processes:
Once we have waiting times, we can compute turn around time tat[i] of a process as sum of waiting and burst times, i.e., wt[i] + bt[i]
Below is implementation of above steps.
C/C++
Java
Python3
C#
Output:
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