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Program for FIFO page replacement algorithm admin We are a group of young techies trying to provide the best study material for all Electronic and Computer science students. Hello Friends, here's C implementation of Shortest Remaining Time CPU Scheduling Algorithm.To run this program in windows simply copy and paste the program into notepad save it with any name you want with extension '.c'.To run this program under linux just remove '#include,getch(); and clrscr();' from the program and save it with extension '.c'.Program developed and tested by Niraj. Round Robin Scheduling Program in C. Shortest remaining time first (SRTF), is a scheduling method that is a preemptive version of shortest job next scheduling. In this scheduling algorithm. Enter the burst times in order: n'. C program to Implement Morse code to text conversion and vice-versa. C Program for Priority CPU Scheduling Algorithm 49 Responses to “C program for Priority Scheduling”. 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.
Let us learn how to implement preemptive priority scheduling algorithm in C programming with its explanation, output, advantages, disadvantages and much more.
What is Preemptive Priority Scheduling Algorithm?
The preemptive priority scheduling algorithm is a popular operating system process management and job scheduling algorithm.
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Every job that enters the job queue is assigned a priority based on which its execution takes place. As simple it sounds, the processes with a higher priority will be executed first and then the processes with the lower priorities will be executed.
If there are multiple processes in the queue with the same priority, then such jobs are executed in the order of their arrival often called as first come first served. Tom clancy under fire grant blackwood youtube.
In this preemptive implementation of priority scheduling program in C, we consider the arrival time of the processes.
Since this is a preemptive job scheduling algorithm, the CPU can leave the process midway. The current state of the process will be saved by the context switch.
The system can then search for another process with a higher priority in the ready queue or waiting queue and start its execution.
Once the CPU comes back to the previous incomplete process, the job is resumed from where it was earlier paused.
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Advantages
- Preemptive priority scheduling is much more efficient as compared to the non-preemptive version.
- This priority job scheduling algorithm is quite simple to implement.
- The aging technique is implemented to reduce the starvation of lower priority processes.
- The average turnaround time and waiting time is efficient.
Disadvantages
- Indefinite blockage of the lower priority jobs.
- For a system failure occurs, the unfinished lower priority jobs are removed from the system and cannot be recovered.
Note: This implementation of preemptive priority scheduling program in C with arrival time is compiled with GNU GCC compiler using Linux terminal on Linux Ubuntu operating system.
Preemptive Priority Scheduling Algorithm in C Programming
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72 74 76 | { intarrival_time,burst_time,ct,waiting_time,turnaround_time,priority; }process_queue[10]; intlimit; voidArrival_Time_Sorting() structprocess temp; for(i=0;i<limit-1;i++) for(j=i+1;j<limit;j++) if(process_queue[i].arrival_time>process_queue[j].arrival_time) temp=process_queue[i]; process_queue[j]=temp; } } voidmain() inti,time=0,burst_time=0,largest; floatwait_time=0,turnaround_time=0,average_waiting_time,average_turnaround_time; scanf('%d',&limit); { printf('nEnter Details For Process[%C]:n',process_queue[i].process_name); scanf('%d',&process_queue[i].arrival_time); scanf('%d',&process_queue[i].burst_time); scanf('%d',&process_queue[i].priority); burst_time=burst_time+process_queue[i].burst_time; Arrival_Time_Sorting(); printf('nProcess NametArrival TimetBurst TimetPrioritytWaiting Time'); for(time=process_queue[0].arrival_time;time<burst_time;) largest=9; { if(process_queue[i].arrival_time<=time&&process_queue[i].status!=1&&process_queue[i].priority>process_queue[largest].priority) largest=i; } process_queue[largest].ct=time; process_queue[largest].waiting_time=process_queue[largest].ct-process_queue[largest].arrival_time-process_queue[largest].burst_time; process_queue[largest].turnaround_time=process_queue[largest].ct-process_queue[largest].arrival_time; wait_time=wait_time+process_queue[largest].waiting_time; turnaround_time=turnaround_time+process_queue[largest].turnaround_time; printf('n%ctt%dtt%dtt%dtt%d',process_queue[largest].process_name,process_queue[largest].arrival_time,process_queue[largest].burst_time,process_queue[largest].priority,process_queue[largest].waiting_time); average_waiting_time=wait_time/limit; printf('nnAverage waiting time:t%fn',average_waiting_time); printf('Average Turnaround Time:t%fn',average_turnaround_time); |
Output
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Priority Scheduling Algorithm In C
CPU Scheduling Algorithms |
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Preemptive Shortest Job First Algorithm |
FCFS Algorithm |
Shortest Job First Algorithm |
Round Robin Algorithm |
Priority Scheduling Algorithm |
Multi-Level Feedback Queue Algorithm |
C SCAN CPU Scheduling Algorithm C Program |
SCAN Scheduling Algorithm C Program |
Shortest Seek Time First Algorithm |