CPU SCHEDULING | OPERATING SYSTEM | LECTURE 02 BY DR. ASHISH KUMAR | AKGEC

CPU SCHEDULING | OPERATING SYSTEM | LECTURE 02 BY DR. ASHISH KUMAR | AKGEC

by Dr. Ashish Kumar

Formal & Physical Sciences Computing & Cybersecurity UComputing and Information TechnologyUYComputer science
🎙 Dr. Ashish Kumar 👥 22K 📅 September 4, 2026 ⏱ 25 min 👁 1 📄 lecture 🧭 2026-09-04
Available in: English (current) Français

Keywords

CPU schedulingprocess statesscheduling criteriaschedulersthreads

Summary

This lecture, part of an operating systems course, introduces the fundamental concepts of CPU scheduling. The instructor, Dr. Ashish Kumar, begins by defining scheduling and its importance in managing process execution and maximizing CPU utilization. He explains the need for scheduling in multiprogramming environments, highlighting issues like CPU idle time and potential deadlocks. The lecture covers the purpose of scheduling, including maximizing CPU utilization, ensuring fairness, and minimizing turnaround, waiting, and response times. It lists common scheduling algorithms such as First Come First Serve, Round Robin, and Shortest Job First, and distinguishes between preemptive and non-preemptive approaches. The core of the lecture focuses on CPU scheduling criteria: CPU utilization, throughput, turnaround time, waiting time, response time, and completion time, with definitions and formulas. The instructor then explains process states (new, ready, running, waiting, terminated) and the role of long-term, short-term, and medium-term schedulers. Finally, it compares user-level and kernel-level threads, and processes versus threads, emphasizing their characteristics and differences. The lecture is a basic introduction, suitable for undergraduate students, but lacks detailed examples or advanced topics.

176 words

Critical Evaluation

Value of the Information & Strength of the Argument

The lecture provides a solid, albeit basic, overview of CPU scheduling concepts. Its value lies in its clear enumeration of scheduling criteria and process states, which are essential for understanding OS operations. The argumentation is straightforward, presenting definitions and formulas without deep analysis. The instructor uses analogies (e.g., comparing turnaround time to time spent in college) to illustrate concepts, which aids comprehension. However, the lecture does not critically evaluate different scheduling algorithms or discuss their trade-offs in depth. The explanation of preemptive vs. non-preemptive scheduling is brief and could be more detailed. Overall, the content is informative for beginners but lacks the depth expected for a more advanced audience.

Scientific Rigor, Source Quality, Title Accuracy

The lecture is scientifically accurate, presenting standard definitions and concepts from operating systems. The instructor does not cite specific sources, but the content aligns with common textbooks like Silberschatz’s ‘Operating System Concepts’. The title accurately reflects the content, which is a lecture on CPU scheduling. The presentation is somewhat disorganized, with the instructor occasionally losing his train of thought, but the information is correct. No external sources are cited, and the only links provided are to the college website and the course playlist, which are not directly referenced in the lecture. The video has very few views and no comments, so no public feedback is available.

230 words

Title / Content Match

The title accurately reflects the content: a lecture on CPU scheduling in operating systems.

Quality & Reliability

6/10

Content is a standard academic lecture on CPU scheduling, covering fundamental concepts and criteria. The information is accurate and aligns with established OS textbooks, but lacks depth and critical analysis. The presentation is somewhat disorganized and contains verbal repetitions, but the core definitions and formulas are correct.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Concurring Sources

  • Operating System Concepts by Silberschatz, Galvin, Gagne — Standard textbook covering CPU scheduling concepts in depth.

Contribution & Novelties

The lecture provides a standard introduction to CPU scheduling, covering definitions and criteria. Its novelty is limited, as it follows a typical textbook structure. The main contribution is the clear enumeration of scheduling criteria and process states, which can serve as a study guide for students.

Pour aller plus loin :

87 words

Radar Profile

The radar profile shows moderate scores across all dimensions, indicating a balanced but not exceptional lecture. The quantity of information is adequate, but the quality and technical depth are average, reflecting the introductory nature of the content. The reliability is acceptable, as the information is accurate but not deeply sourced.

Reliability 6/10