CPU Scheduling Program in C In the beginning of the program, I define a class name ‘ cpuschedule’, the class contains seven public methods. Getdata method contains the user input for no. Of process and burst time for process. Fcfs method calculates First come First served Algorithm and show the Total and Average Weighting Time.
Sjf method calculates Shortest job First Algorithm, SjfNp is Shortest job First Algorithm with Non Preemptive, SjfP is Shortest job First Algorithm with Preemption and RoundRobin method is Round Robin Algorithm and show the Total and Average Weighting Time. The main function, in the main function there is a infinity loop with a termination point. When the user enters an choice the with the following number the program goes to the corresponding method call the Algorithm or User Input for calculation. Method definition: Fcfs ( ): Step 1: it loops through all the burst time process. Step 2: now it store weight in the array.
Step 3: after that, the third loop in the method calculates the total weight time and we can divide the total time with the no. Of process to find the average time. Sjf ( ): Step 1: firstly the program loops through the time for process then Step 2: it sort the burst time process and Step 3: calculate the weight by adding the previous value of weight and the burst time which stored inside the array.
Priority Scheduling Example
Step 4: finally the total weighting time is calculate by adding the current time and weight SjfNp ( ): Step 1: in the beginning of the method it prints out the burst time for the process and gets the input from the arrival time of the process. Step 2: after that the burst array and arrival time array sort their position by ascending order. Step 3: now program prints the burst time and arrival time. Step 4: the total weighting time is calculate by adding the current time with the result of weight subtracting by the arrival time. Step 5: finally the average weight calculation, total weight divide by the number of processes. Priority ( ) Step 1: shows Burst time and get input from the priority for process from the user Step 2: it calculate the weight by w=w+Bi if current value of P equals to j Step 3: then the method loop through the current time and adding the time with all weights in the array to find the total time and divide by the processes will show the average time.
Priority Cpu Scheduling
Huawei g6 u10 4.4.2 version 4.0. SjfP ( ): Step 1: in the beginning of the method it prints out the burst time for the process and gets the input from the arrival time of the process and we calculate assign the biggest value of arrival time in the time variable. Step 2: now while the t is less than Time and if arrival time is less or equal t and burst time not equals zero then the program prints the weight. Next for burst time is zero the program loop through with the condition of j is less then n and the flag is not equal zero and if ( S j != 'F' && B i B j && A j.
Here you will get C/C program for first come first served (fcfs) scheduling algorithm. What is First Come First Served (FCFS) Scheduling Algorithm? First Come First Served (FCFS) is a Non-Preemptive scheduling algorithm. FIFO (First In First Out) strategy assigns priority to process in the order in which they request the processor.
The process that requests the CPU first is allocated the CPU first. This is easily implemented with a FIFO queue for managing the tasks. As the process come in, they are put at the end of the queue. As the CPU finishes each task, it removes it from the start of the queue and heads on to the next task.
Also Read: C Program. ↓. tina Hi Neeraj.
Thanks for your helpful example here. Im trying to program for FCFS. All related examples online I found are for 1 server (machine) N processes (job). Like in your example, 3 process would be processed in sequence by one server.
However, in my case, I have several servers (let’s say I have 10 machines) and 100 processes (jobs). I know about the arrival time of each job, i know how long each job would be finished (all machines have the same speed).
Now I need to get a machine-job match based on FCFS. The difference of my case with yours is that I cannot assignment all jobs to a single machine. The constraints in my case is that for each job, it has its own several specific machines MAC to be assignment to. (1 job – 1 machine (this machine should be from MAC). So in my case, firstly I would make a list of jobs based on their arrival time; Then I would assign the first job with earlier arrival time to one of its suitable machines; Do the same to the second coming, the third and more. I’m new in programming and wondering if you have programmed for similar cases. Any suggestions would be greatly appreciated.
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