SJF CPU Scheduling Visualizer

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FCFS

SJF

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SJF Algorithm Flowchart

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1. Arrival Time

Processes arrive at specific time units

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2. Burst Time

Each process has execution duration

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3. Selection

Pick shortest burst time from ready queue

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4. Execution

Execute selected process to completion

FCFS (First Come First Serve)

✅ Simple implementation
❌ Can cause convoy effect
❌ Higher average waiting time
⚖️ Fair but not efficient

                    SJF (Shortest Job First)
                    ✅ Minimizes waiting time
✅ Optimal algorithm
⚠️ Requires burst time knowledge
💡 Better efficiency

                

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🤔 Which algorithm will have a lower Average Waiting Time?

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Performance Dashboard

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CPU Utilization

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Throughput

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SJF Efficiency

Algorithm Insights

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Best Case for SJF

When processes have varying burst times, SJF minimizes average waiting time.

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SJF Limitation

Requires knowing burst time in advance. Can lead to starvation of long processes.

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When to Use FCFS

Simple to implement. Best when all processes have similar burst times or fairness is priority.

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Key Takeaway

SJF is optimal for minimizing average wait time but FCFS is simpler and fairer.