Computer Organisation and Architecture - Vol 3 | 17. FIFO Page Replacement by Abraham | Learn Smarter
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17. FIFO Page Replacement

The chapter covers various page replacement algorithms used in operating systems, emphasizing the mechanics and effectiveness of FIFO, Optimal, and LRU strategies. It addresses the challenges and solutions surrounding these algorithms, particularly in tracking page usage to minimize page faults. It also discusses approximation techniques for LRU and introduces the modified clock replacement algorithm, highlighting their practical applications and limitations.

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Sections

  • 17.1

    Fifo Page Replacement

    The FIFO (First-In-First-Out) page replacement algorithm replaces the oldest page in memory based on the order they were loaded, but it is not efficient as it does not consider the frequency of page usage.

    Learning Practice

  • 17.1.1

    Compulsory Misses

    This section discusses compulsory misses in caching and page replacement strategies in computer memory management.

    Learning Practice

  • 17.1.2

    Fault Rate

    This section discusses the concepts of page faults and fault rates in memory management algorithms.

    Learning Practice

  • 17.1.3

    Limitations Of Fifo

    This section explores the limitations of the FIFO page replacement algorithm, highlighting its inefficiency in managing memory utilization.

    Learning Practice

  • 17.2

    Optimal Page Replacement Algorithm

    This section discusses the optimal page replacement algorithm and its comparison with the FIFO and LRU methods, highlighting how it minimizes page faults.

    Learning Practice

  • 17.2.1

    Concept Of Optimal Replacement

    The section explores various page replacement algorithms including FIFO and Optimal Replacement, discussing their mechanics and efficiency in managing memory accesses.

    Learning Practice

  • 17.2.2

    Comparison With Fifo

    This section compares the First-In-First-Out (FIFO) page replacement algorithm with other approaches like optimal and least recently used (LRU) methods, highlighting their strengths and weaknesses.

    Learning Practice

  • 17.3

    Least Recently Used (Lru)

    This section explains the Least Recently Used (LRU) page replacement algorithm, its functioning, and its performance compared to other algorithms.

    Learning Practice

  • 17.3.1

    Implementation Challenges

    This section discusses the challenges related to memory page replacement algorithms, emphasizing the implications of different strategies.

    Learning Practice

  • 17.3.2

    Counter-Based Solution

    This section discusses counter-based methods for implementing page replacement algorithms, focusing on the Least Recently Used (LRU) approach and its approximations.

    Learning Practice

  • 17.3.3

    Stack-Based Solution

    This section discusses various page replacement algorithms used in operating systems, including FIFO, Optimal page replacement, LRU and its approximations.

    Learning Practice

  • 17.3.4

    Approximate Lru Techniques

    This section discusses various page replacement techniques, particularly focusing on Approximate Least Recently Used (LRU) methods and their significance in memory management.

    Learning Practice

  • 17.4

    Reference Bit Technique

    This section introduces various page replacement strategies used in memory management, specifically focusing on the Reference Bit Technique.

    Learning Practice

  • 17.4.1

    Reference Bit Strategy

    This section discusses various page replacement strategies for managing memory in computer systems, including the FIFO algorithm, optimal page replacement, and LRU strategies.

    Learning Practice

  • 17.4.2

    Sampled Lru Algorithm

    This section discusses the Sampled LRU (Least Recently Used) algorithm for page replacement in memory management, exploring its implementation challenges and how it approximates the optimal page replacement strategy.

    Learning Practice

  • 17.5

    Clock Replacement Algorithm

    This section covers various page replacement algorithms, focusing on the Clock Replacement Algorithm and comparing it to others like FIFO and Optimal Replacement.

    Learning Practice

  • 17.5.1

    Second Chance Page Replacement

    This section explores different page replacement algorithms, emphasizing the Second Chance Page Replacement method and its practical implications in memory management.

    Learning Practice

  • 17.5.2

    Conclusion On Clock Algorithm

    This section discusses the performance and evaluation of various page replacement algorithms, particularly focusing on the Clock and Least Recently Used (LRU) algorithms.

    Learning Practice

  • 17.6

    Modified Clock Algorithm

    The section covers the Modified Clock Algorithm, an improved page replacement strategy that utilizes reference bits and dirty bits to optimize memory management.

    Learning Practice

  • 17.6.1

    Dirty Pages Handling

    This section explains the concepts of page replacement algorithms in memory management, particularly focusing on dirty pages, and their impact on system performance.

    Learning Practice

References

32 part c.pdf

Class Notes

Memorization

What we have learnt

  • The FIFO algorithm replaces...
  • The Optimal Page Replacemen...
  • The Least Recently Used (LR...

Final Test

Revision Tests