What is CPU scheduling?

CPU scheduling is the process by which the operating system determines which process runs at a given time. It's a fundamental concept in operating systems that ensures efficient CPU utilization and fair resource allocation among competing processes.

Which CPU scheduling algorithms are supported?

Our visualizer supports FCFS (First Come First Served), SJF (Shortest Job First) both preemptive and non-preemptive, Round Robin with custom time quantum, and Priority Scheduling in both preemptive and non-preemptive modes. All algorithms include Gantt chart visualization.

How do I calculate waiting time and turnaround time?

The CPU Scheduling Visualizer automatically calculates waiting time and turnaround time for each process. Waiting time is the total time a process waits in the ready queue, and turnaround time is the time from submission to completion. Simply input your processes and click submit to see the results.

What is the difference between preemptive and non-preemptive scheduling?

In preemptive scheduling, a running process can be interrupted and moved to the ready queue if a higher priority process arrives. In non-preemptive scheduling, once a process starts executing, it runs to completion without interruption. Our visualizer demonstrates both types clearly with animations.

Is this CPU scheduling visualizer free to use?

Yes! The CPU Scheduling Visualizer is completely free to use. No registration or sign-up required. Simply visit the website and start learning CPU scheduling algorithms with interactive Gantt charts and performance metrics.

How can this tool help with GATE exam preparation?

This visualizer helps GATE aspirants understand CPU scheduling algorithms through hands-on practice. You can input custom process data, visualize Gantt charts, and verify your manual calculations of waiting time and turnaround time - all essential skills for GATE Operating Systems questions.

What is Round Robin time quantum?

Time quantum (or time slice) in Round Robin scheduling is the fixed amount of CPU time allocated to each process. Our visualizer allows you to set custom time quantum values to see how different values affect average waiting time and turnaround time.

About Us | CPU Scheduling Visualizer

Our Story

The CPU Scheduling Visualizer was born out of a simple observation: many computer science students struggle to understand CPU scheduling algorithms when taught through traditional textbooks and lectures alone. These algorithms are fundamental to operating systems, yet their abstract nature makes them difficult to grasp.

We believed there had to be a better way. What if students could see these algorithms in action? What if they could input their own process data and watch the scheduling unfold in real-time? That's the vision that drove us to create this tool.

Today, our CPU Scheduling Visualizer is used by thousands of students, educators, and professionals worldwide. Whether you're preparing for your operating systems exam, studying for GATE, or reviewing concepts for a technical interview, our tool provides an intuitive way to understand and compare different scheduling algorithms.

Our Mission

Our mission is to make computer science education more accessible and engaging through interactive visualization tools. We believe that:

Visual learning accelerates understanding: Seeing an algorithm work step-by-step is far more effective than reading about it in a textbook.
Education should be free: Quality learning resources should be available to everyone, regardless of their financial situation.
Practice makes perfect: By allowing users to experiment with different inputs and algorithms, we enable deeper learning through hands-on experience.
Technology should simplify, not complicate: Our tool is designed to be intuitive and user-friendly, requiring no prior setup or technical knowledge.

What We Offer

🖥️ Interactive Visualization

Watch CPU scheduling algorithms execute in real-time with animated Gantt charts that clearly show process execution order and timing.

📊 Multiple Algorithms

Support for FCFS, SJF (preemptive and non-preemptive), Round Robin, and Priority Scheduling (preemptive and non-preemptive).

📈 Performance Metrics

Automatic calculation of average waiting time, turnaround time, and other key performance metrics for each process.

🔄 Algorithm Comparison

Compare the performance of different algorithms side-by-side using the same process data to understand trade-offs.

📄 PDF Export

Export your results as professional PDF documents, perfect for assignments, study notes, or documentation.

💰 Completely Free

No registration, no hidden fees, no premium features locked behind a paywall. Our tool is 100% free for everyone.

Who We Help

Our CPU Scheduling Visualizer is designed to support:

Computer science and IT students studying operating systems
GATE and other competitive exam aspirants
Software engineers preparing for technical interviews
University professors and teachers creating course materials
Self-learners exploring computer science fundamentals
Researchers comparing scheduling algorithm performance