Skip to main content

Scheduling Algorithms

There are various algorithms which are used by the Operating System to schedule the processes on the processor in an efficient way.

The Purpose of a Scheduling algorithm

Maximum CPU utilization
Fare allocation of CPU
Maximum throughput
Minimum turnaround time
Minimum waiting time
Minimum response time

There are the following algorithms which can be used to schedule the jobs.

1. First Come First Serve

It is the simplest algorithm to implement. The process with the minimal arrival time will get the CPU first. The lesser the arrival time, the sooner will the process gets the CPU. It is the non-preemptive type of scheduling.

2. Round Robin

In the Round Robin scheduling algorithm, the OS defines a time quantum (slice). All the processes will get executed in the cyclic way. Each of the process will get the CPU for a small amount of time (called time quantum) and then get back to the ready queue to wait for its next turn. It is a preemptive type of scheduling.

3. Shortest Job First

The job with the shortest burst time will get the CPU first. The lesser the burst time, the sooner will the process get the CPU. It is the non-preemptive type of scheduling.

4. Shortest remaining time first

It is the preemptive form of SJF. In this algorithm, the OS schedules the Job according to the remaining time of the execution.

5. Priority based scheduling

In this algorithm, the priority will be assigned to each of the processes. The higher the priority, the sooner will the process get the CPU. If the priority of the two processes is same then they will be scheduled according to their arrival time.

6. Highest Response Ratio Next

In this scheduling Algorithm, the process with highest response ratio will be scheduled next. This reduces the starvation in the system.

Comments

Post a Comment

Popular posts from this blog

Spring Security with JWT for REST API

Spring is considered a trusted framework in the Java ecosystem and is widely used. It’s no longer valid to refer to Spring as a framework, as it’s more of an umbrella term that covers various frameworks. One of these frameworks is Spring Security , which is a powerful and customizable authentication and authorization framework. It is considered the de facto standard for securing Spring-based applications. Despite its popularity, I must admit that when it comes to single-page applications , it’s not simple and straightforward to configure. I suspect the reason is that it started more as an MVC application -oriented framework, where webpage rendering happens on the server-side and communication is session-based. If the back end is based on Java and Spring, it makes sense to use Spring Security for authentication/authorization and configure it for stateless communication. While there are a lot of articles explaining how this is done, for me, it was still frustrating to set it up for the f...
Post a Comment
Read more

How to answer conflict-resolution interview questions

QUESTION 1: How do you deal with conflict? People aren’t going to get along with each other all the time. It’s just a fact. Employers want to know that you can respond to conflict diplomatically, says job-search and interview coach Thea Kelley. If you’re a my-way-or-the-highway type of personality, you’re not going to get very far in the interview. Start off by emphasizing communication and respectfulness as a means to conflict resolution. For example, “I always take the person aside and discuss the issue privately. I listen actively to make sure I understand the other person’s point of view, and I work with the person to develop a solution together.” Stress that even if you both don’t completely agree on the end result, you tried to at least meet each other halfway. Pro tip: “Don’t non verbally communicate resentment when telling a story,” Kelley advises. “Aggressive body language and tone of voice can show that you harbor bad feelings.” QUESTION 2: Tell me about a time when you had ...
Post a Comment
Read more

Programming C : Hello world

 1. Hello world #Hello World #include<stdio.h> //This line describe about to include header file of standard input and output.  void main(void) //main is a function with void datatype   { printf("Hello World"); }  Output : Hello World How "Hello, World!" program works? The  #include <stdio.h>  is a preprocessor command. This command tells compiler to include the contents of  stdio.h  (standard input and output) file in the program. The  stdio.h  file contains functions such as  scanf()  and  print()  to take input and display output respectively. If you use  printf()  function without writing  #include <stdio.h> , the program will not be compiled. The execution of a C program starts from the  main()  function. The  printf()  is a library function to send formatted output to the screen. In this program, the  printf()  displays  Hello, World!  text...
Post a Comment
Read more