FCFS · SJF · Round Robin · Priority · Compare
CPU Scheduling Algorithms Comparison
Run FCFS, SJF, Round Robin, and Priority Scheduling using the same process input and compare their results.
| PID | Arrival | Burst | Priority |
|---|
CPU Scheduling Algorithms
CPU scheduling determines which process should use the CPU when multiple processes are ready to run. Different scheduling algorithms use different rules to select the next process.
This calculator compares four common CPU scheduling algorithms: FCFS, SJF, Round Robin, and Priority Scheduling.
FCFS vs SJF
FCFS (First Come First Serve) executes processes according to their arrival order. SJF (Shortest Job First) selects the available process with the shortest burst time.
SJF can provide a lower average waiting time, while FCFS is simpler because it only needs the arrival order.
FCFS vs Round Robin
FCFS allows a process to run until it finishes. Round Robin is preemptive and gives each process a fixed time quantum before moving to the next process.
SJF vs Priority Scheduling
SJF selects a process based on its burst time, while Priority Scheduling selects a process based on its assigned priority.
Round Robin vs Priority Scheduling
Round Robin focuses on giving processes a fair share of CPU time, while Priority Scheduling focuses on executing higher-priority processes first.
CPU Scheduling Comparison
| Algorithm | Type | Selection | Preemptive |
|---|---|---|---|
| FCFS | Queue | Arrival order | No |
| SJF | Shortest job | Shortest burst | No |
| Round Robin | Time sharing | Time quantum | Yes |
| Priority | Priority based | Priority value | No |
Which CPU Scheduling Algorithm Is Best?
There is no single best CPU scheduling algorithm for every situation. The appropriate algorithm depends on factors such as waiting time, response time, fairness, process length, and system requirements.
Related CPU Scheduling Calculators
Use the individual FCFS Calculator, SJF Calculator, Round Robin Calculator, or Priority Scheduling Calculator .