C Program For Srtf Cpu Scheduling Algorithm

23.01.2020by

Let us learn how to implement priority scheduling algorithm in C programming with its explanation, output, advantages, disadvantages and much more.

A simple program demonstrating the preemptive and non-preemptive CPU scheduling algorithms (First Come First Serve, Shortest Process First, Shortest Remaining Time First, Priority Scheduling - both preemptive and non-preemptive, and Round Robin. Shortest Remaining Time First ( SRTF ) or preemptive sjf cpu scheduling in c On-campus and online computer science courses to Learn the basic concepts of Computer Science.This tutorial will cover c,c++, java, data structure and algorithm,computer graphics,microprocessor,analysis of algorithms,Digital Logic Design and Analysis,computer. C++ Program For PRIORITY WITH PREEMPTIVE Scheduling Algorithm Priority Based Scheduling Priority scheduling is a non-preemptive algorithm and one of the most common scheduling algorithms in batch systems. Each process is assigned a priority. Process with highest priority is to be executed first and so on. Os Scheduling algorithm source code. Rate this: Please. Scheduling algorithm source code Fifo and RR I wanted my system with charts. The programming language C + + esi.spinas@gmail.com Posted 29-Feb-12 7:53am. Add a Solution.

What is Non-Preemptive Priority Scheduling Algorithm?

The priority scheduling algorithm is one of the most common algorithms for scheduling jobs in batch systems.

Cpu scheduling algorithm examples

Every process is assigned a number which denotes the priority, and based on this priority the processes are executed. Therefore, the process having the highest priority (1) is executed first and then the priority 2, 3 and so on.

C Program For Srtf Cpu Scheduling Algorithm

There can be some scenarios where more two or more processes may have the same priority. In this case, the processes are executed based on First In First Out order or in other words, First Come First Serve.

We do not consider the arrival time of the jobs in this non-preemptive priority scheduling algorithm. This means that unless a job gets completely executed, the CPU won’t leave the current job before it completes its execution.

Scheduling Algorithms In Os

Only once the process gets out of the job queue after successful execution, the CPU is allowed to process another job from the queue.

Advantages

  • This algorithm is very simple to implement.
  • The aging technique is implemented to reduce the starvation of lower priority processes.

Disadvantages

  • Starvation or indefinite blockage of the lower priority processes.
  • Since this is a non-preemptive implementation, the waiting time is comparatively higher.
  • The average turnaround time is higher as compared to the preemptive priority scheduling algorithm.
  • If a system failure occurs, all the unfinished lower priority jobs get vanished from the system.

Note: This implementation of non-preemptive priority scheduling program in C without arrival time is compiled with GNU GCC compiler using Linux terminal on Linux Ubuntu operating system.

Junior

C Program To Implement Non-Preemptive Priority Scheduling Algorithm

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{
intburst_time[20],process[20],waiting_time[20],turnaround_time[20],priority[20];
floataverage_wait_time,average_turnaround_time;
scanf('%d',&limit);
printf('nEnter Burst Time and Priority For %d Processesn',limit);
{
printf('Process Burst Time:t');
printf('Process Priority:t');
process[i]=i+1;
for(i=0;i<limit;i++)
position=i;
{
{
}
temp=priority[i];
priority[position]=temp;
burst_time[i]=burst_time[position];
temp=process[i];
process[position]=temp;
waiting_time[0]=0;
{
for(j=0;j<i;j++)
waiting_time[i]=waiting_time[i]+burst_time[j];
sum=sum+waiting_time[i];
average_wait_time=sum/limit;
printf('nProcess IDttBurst Timet Waiting Timet Turnaround Timen');
{
sum=sum+turnaround_time[i];
printf('nProcess[%d]tt%dtt %dtt %dn',process[i],burst_time[i],waiting_time[i],turnaround_time[i]);
average_turnaround_time=sum/limit;
printf('nAverage Waiting Time:t%f',average_wait_time);
printf('nAverage Turnaround Time:t%fn',average_turnaround_time);
}

C Program For Priority Cpu Scheduling Algorithm With Arrival Time

Output

If you have any doubts about the implementation of non-preemptive priority scheduling in C programming, let us know about it in the comment section. For more details, check Wikipedia.

Cpu Scheduling Algorithm Examples

CPU Scheduling Algorithms
Preemptive Shortest Job First Algorithm
Circular SCAN Scheduling Algorithm
FCFS Scheduling Algorithm
Round Robin Algorithm
Multi-Level Feedback Queue Algorithm
SCAN Disk Scheduling Algorithm
Shortest Job First Algorithm
Shortest Seek Time First Algorithm
Preemptive Priority Algorithm
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