If the CPU scheduling policy is Round Robin with time quantum = 2, calculate the average waiting time and average turn around time. Consider the set of 6 processes whose arrival time and burst time are given below- If the CPU scheduling policy is Round Robin with time quantum = 3, calculate the average waiting time and average turn around time.

How to find completion time of a given process in round robin?

We are given n-processes with their completion times in form of an array. We need to find the time instant when a given process p ends if the scheduling process is round robin and time slice is 1-sec. note : Array index start with 0. Brute Force : The basic approach for solving this problem is to apply round robin algorithm with time slice 1.

When did Tobin come up with the Q ratio?

The data for Tobin’s original (1977) paper covered the years 1960 to 1974, a period for which Q seemed to explain investment pretty well. But looking at other time periods, the Q fails to predict over- or undervalued markets or firms.

How many burst units are needed for round robin?

Their burst CPU time requirements are 4, 1, 8, 1 time units respectively. The completion time of A under round robin scheduling with time slice of one time unit is- Clearly, completion time of process A = 9 unit. Thus, Option (D) is correct. Get more notes and other study material of Operating System.

What do you need to know about round robin scheduling?

There is Low throughput. 3. A round-robin scheduler generally employs time-sharing, giving each job a time slot or quantum. There is Context Switches. 4. While performing a round-robin scheduling,a particular time quantum is alloted to different jobs.

How to calculate average waiting time for round robin?

Step 6) P2 has a burst time of 3. It has already executed for 2 interval. At time=9, P2 completes execution. Then, P3 starts execution till it completes. Step 7) Let’s calculate the average waiting time for above example.

How is the CPU assigned in round robin?

Operating System. In Round Robin Scheduling, CPU is assigned to the process on the basis of FCFS for a fixed amount of time. This fixed amount of time is called as time quantum or time slice. After the time quantum expires, the running process is preempted and sent to the ready queue. Then, the processor is assigned to the next arrived process.