What are the criteria for process scheduling?
CPU Scheduling Criteria
- CPU utilisation – The main objective of any CPU scheduling algorithm is to keep the CPU as busy as possible.
- Throughput – A measure of the work done by CPU is the number of processes being executed and completed per unit time.
- Turnaround time –
- Waiting time –
- Response time –
What are different types of scheduling criteria?
Six types of process scheduling algorithms are: First Come First Serve (FCFS), 2) Shortest-Job-First (SJF) Scheduling, 3) Shortest Remaining Time, 4) Priority Scheduling, 5) Round Robin Scheduling, 6) Multilevel Queue Scheduling.
What are the characteristics of a good process scheduler?
Characteristics include Utilization of CPU, Response time, Throughput, Turnaround time, Waiting time and fairness.
What are the different criteria for measuring the performance of scheduling mechanism?
Throughput: The measure of work done in a unit time interval. Turnaround Time (tat): The sum of time spent waiting to get into the ready queue, execution time and I/O time. Waiting Time (wt): Time spent in ready queue. Processor scheduling algorithms only affect the time spent waiting in the ready queue.
What is a process scheduler state the characteristics of a good process scheduler?
Various criteria or characteristics that help in designing a good scheduling algorithm are: CPU Utilization − A scheduling algorithm should be designed so that CPU remains busy as possible. It should make efficient use of CPU. Throughput − Throughput is the amount of work completed in a unit of time.
What is the role of process scheduler?
It is also called as CPU scheduler. Its main objective is to increase system performance in accordance with the chosen set of criteria. It is the change of ready state to running state of the process. CPU scheduler selects a process among the processes that are ready to execute and allocates CPU to one of them.
What are the performance criteria of a scheduling algorithm?
Scheduling Algorithm Optimization Criteria: Maximize throughput. Minimize turnaround time. Minimize waiting time. Minimize response time.
What is a process scheduling policy?
An operating system uses process scheduling to ensure that processes execute efficiently and have reduced wait times. The goal of process scheduling policies is to use CPU resources wisely, increase throughput, reduce wait time, increase response and turnaround times.
Why process scheduling is required?
Process scheduling allows OS to allocate a time interval of CPU execution for each process. Another important reason for using a process scheduling system is that it keeps the CPU busy all the time. This allows you to get the minimum response time for programs.
What are the criteria for a CPU scheduling algorithm?
The criteria include the following: The main objective of any CPU scheduling algorithm is to keep the CPU as busy as possible. Theoretically, CPU utilisation can range from 0 to 100 but in a real-time system, it varies from 40 to 90 percent depending on the load upon the system.
What is process scheduling in Linux?
Process Scheduling is an OS task that schedules processes of different states like ready, waiting, and running. Process scheduling allows OS to allocate a time interval of CPU execution for each process. Another important reason for using a process scheduling system is that it keeps the CPU busy all the time.
Does a scheduling algorithm affect the time required to complete the process?
A scheduling algorithm does not affect the time required to complete the process once it starts execution. It only affects the waiting time of a process i.e. time spent by a process waiting in the ready queue.
What is the purpose of system scheduling?
Scheduling is a process which allows one process to use the CPU while the execution of another process is on hold (in waiting state) due to unavailability of any resource like I/O etc. 2. The aim of scheduling is to make the system efficient, fast and fair.