CPU and IO Bound Process

Duration: 3 min

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Module outline

  1. Quantitative Ability: Percentage, Profit and Loss, Ratio and Proportion (Ratios), Average, Time and Work, Speed Time and Distance, Simple Interest and Compound Interest, Age Problems, Number System, Divisibility Rules, HCF LCM, Algebra, Permutation and Combination, Probability, Data Interpretation, Logarithm, Sequence and Series (Series), Powers and Exponents (Surds and Indices), Speed Mathematics and Basic Mathematics
  2. Logical Reasoning: Seating Arrangements, Puzzle Solving (Puzzles), Data Arrangement, Coding Decoding, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Data Sufficiency, Venn Diagram, Inequality, Series (Number and Letter Series) (Numerical Relations and Reasoning), Logical Sequence Of Words, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Analogy, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning)
  3. Verbal Ability: Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Subject Verb Agreement (Verb Noun Agreement), Tenses, Articles, Preposition, Conjunction, Modals, Active Passive Voice (Voice), Direct and Indirect Speech, Vocabulary, Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Sentence Completion (Fill in the blanks), Sentence Correction (Error Correction), Cloze Test (Cloze Passage), Facts, Inference and Judgements
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  7. OOPs (Technical): Object Oriented Programming (OOPS)
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  9. SQL (Technical): SQL
  10. Operating Systems (Technical): Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Windows OS, Linux OS, Security, Distributed Systems, Virtual Machines
  11. Computer Networks (Technical): Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security, Mobile Technology, Cloud Computing and IoT, Cyber and Info Security
  12. Software Engineering (Technical): Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  13. Coding/Automata Round: Coding Questions by Yash Sir, C Programming by Yash Sir, Programming in C++, Java, Python for Placements by Yash Sir, Pseudo Codes
  14. Personality / Behavioral Assessment: Behavioral Assessment (Behavioral Competency Profiling) (Psychometric Test)
  15. Writing Assessment: English Writing Ability
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video lecture provides a comprehensive overview of process execution cycles, specifically focusing on the distinction between CPU-bound and I/O-bound processes. The instructor explains that a process execution consists of a cycle involving CPU execution or wait states and I/O execution or wait states. He defines CPU-bound processes as those that generate I/O requests infrequently and spend more time doing computations, while I/O-bound processes spend more time doing I/O. The lecture concludes by discussing the importance of the Long-Term Scheduler in selecting a good process mix to ensure system balance and performance.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor introduces the concept of process execution cycles using a slide titled "CPU Bound and I/O Bound Processes." He explains that a process execution consists of a cycle of CPU execution or wait and I/O execution or wait. The slide text notes that normally a process alternates between two states, beginning with a CPU burst that may be followed by an I/O burst, then another CPU and I/O burst, and so on. He emphasizes that eventually, the process will end up on a CPU burst, keeping the process switching between CPU and I/O during execution. He physically underlines the text "CPU execution or wait" and circles the title terms to emphasize the core concepts. At one point, he writes the word "Break" on the screen, likely illustrating a pause in execution.

  2. 2:00 – 3:25 02:00-03:25

    The slide updates to provide formal definitions. "I/O Bound Processes" are defined as processes that spend more of their time doing I/O than computations. Conversely, "CPU Bound Processes" generate I/O requests infrequently, using more of their time doing computations. The instructor highlights the importance of the long-term scheduler selecting a good process mix. He explains that if all processes are I/O bound, the ready queue will almost always be empty, leaving the short-term scheduler with little to do. Similarly, if all processes are CPU bound, the I/O waiting queue will almost always be empty, devices will go unused, and the system will be unbalanced. Thus, the LTS needs to select a good combination of I/O and CPU bound processes for best system performance. A copyright banner for "Knowledge Gate Eduventures" is visible at the bottom.

The lecture effectively bridges the gap between theoretical process cycles and practical system scheduling. By defining the characteristics of CPU-bound and I/O-bound processes, the instructor sets the stage for understanding why a balanced mix is crucial. The key takeaway is that system performance relies heavily on the Long-Term Scheduler's ability to admit a diverse set of processes, preventing resource starvation in either the CPU or the I/O devices.

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