Java Program for First Come First Serve (FCFS) Scheduling.
Shortest Job First (SJF) is a pre-emptive Scheduling Algorithm for execution Process in Minimum time order means, a process has a minimum time for execution execute first and then second minimum time taking process. SJF is an alternative for FCFS cause it reduces the average waiting time and also good for Batch systems.
The CPU PRIORITY scheduling algorithm is implemented using the C Program. The Scheduling program tested with 3 processes.
Scheduling Algorithm: First Come First Serve (fcfs) Java Program Code Scheduling algorithm is used by CPU scheduler to select a process. There are many types of scheduling algorithm but we will discuss about the most common algorithm FCFS i.e. First come and First Serve. By applying this scheduling algorithm, the CPU makes sure that the process which is run by user are lined in queue.
In this tutorial, we will learn about first come first serve scheduling (FCFS) algorithm in operating system. We have already learnt about basics terms, formulas of CPU Scheduling in previous post. As the name suggests, the process which comes first in the ready queue will be executed first, in first come first serve scheduling algorithm.
The process that requests the CPU first is allocated the CPU first. This is quickly implemented with a FIFO(First Comes Firts Serve) queue for handling all the tasks. As the process come in, they are put at the last of the queue. As the CPU complate each task it will removes from the beginning of the queue and heads on to the next upcomming task. Certain Term Related to the FCFS Algorithm.
First come first serve (FCFS) scheduling algorithm simply schedules the jobs according to their arrival time. The job which comes first in the ready queue will get the CPU first. The lesser the arrival time of the job, the sooner will the job get the CPU. FCFS scheduling may cause the problem of starvation if the burst time of the first process is the longest among all the jobs.
First Come First Served (FCFS) is an Operating System process scheduling algorithm. It is non-preemptive in scheduling algorithm. Jobs are executed on first come, first serve basis. It is easy to understand and implement but poor in performance, as average wait time is high. Implementation of FCFS scheduling algorithm in python is given below.