Segmentation with Paging

Duration: 4 min

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Module outline

  1. About Course: About the Course
  2. Paper 1 | General Studies: State Wise GK
  3. Paper 1 | Information and Communication Technology: Role of Internet and Web Services, Security in Mobile and Wireless Computing
  4. Paper 1 | Current Affairs: GK- Current Affairs
  5. Paper 2 | Discrete Mathematical Structure: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Probability
  6. Paper 2 | Digital Computer Organization And Architecture: Number System, Number Representation, Sequential Circuits, Combinational Circuit, Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Register Transfer and Microoperations, Control Unit Design, Programming the Basic Computer
  7. Paper 2 | C Programming: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling
  8. Paper 2 | Programming Languages & Object-Oriented Programming Concepts: Java, OOPS with C++, Java Fundamentals, Array, String, IO & References
  9. Paper 2 | Python: Introduction to Python, Tokens, Variables, Data Types, I/O, Operators & Expressions, Control Flow & Looping, Collections & Strings, Functions & Modules, File Handling & Data Analysis
  10. Paper 2 | Data Structure And Algorithms: Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Minimum Spanning Trees, Advanced Algorithms
  11. Paper 2 | Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Unix OS
  12. Paper 2 | Theory Of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory
  13. Paper 2 | Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  14. Paper 2 | Database Management System: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, Relational Algebra, SQL, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization, Enhanced Data Models
  15. Paper 2 | Computer Network And Information Security: Introduction to CN, Data Communication, Application Layer, Hardware basics, Cyber Threats and Malware Attacks, Network Security, 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
  16. Paper 2 | Software Engineering: Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  17. Paper 2 | Current Trends & Technologies: Emerging Tech Trends, Approaches to AI, Search Algorithms, Game Playing, Knowledge Representation, Planning, Multi Agent Systems, Fuzzy Sets, Natural Language Processing, Artificial Neural Networks, Genetic Algorithms, Artificial Intelligence, Data Warehousing & Mining, Electronic Data Interchange and E-Commerce, Terms & Abbreviations
  18. Paper 2 | Full Length Mock Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The lecture introduces the concept of Segmentation with Paging, a memory management scheme designed to address the external fragmentation issues found in pure segmentation. The instructor explains that while segmentation divides a process into variable-sized logical units, these segments are further subdivided into fixed-size pages. This hybrid approach combines the logical organization of segmentation with the physical efficiency of paging. The core mechanism involves a two-level address translation process where a logical address is split into a segment number, a page number, and an offset. The instructor contrasts this with multilevel paging, highlighting that segmentation with paging allows for variable partition sizes within segments, unlike the fixed sizes in pure paging. The diagram illustrates the flow from logical address to physical address through segment and page tables.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor begins by presenting the slide titled 'Segmentation with Paging.' He explains the motivation behind this scheme, stating that segmentation suffers from external fragmentation, so it is better to divide segments into pages as their size increases. The on-screen text explicitly notes, 'Since segmentation also suffers from external fragmentation, it is better to divide the segments into pages as the segments size increases.' He describes the structure where a process is divided into segments, and segments are further divided into pages. He notes a similarity to multilevel paging but emphasizes a key difference: 'because here when page table is divided the size of partition can be different.' The diagram shows a logical address structure with fields for Segment No, Page No, and Offset, along with a Segment Table Base Register (STBR).

  2. 2:00 – 3:50 02:00-03:50

    The instructor details the address translation flow using the diagram. He points to the 'CPU' box and the 'Logical Address' fields. He explains that the 'Segment No' is added to the 'STBR' (Segment Table Base Register) to locate the correct entry in the 'Segment Table.' This entry points to a specific 'Page Table.' The 'Page No' is then used to index into this page table to find the 'Frame No.' Finally, the 'Frame No' and 'Offset' are combined to create the 'Physical Address.' He draws on the right side of the screen to visualize how segments map to pages and then to frames in 'Main Memory,' illustrating that different segments can have different page table sizes. The bottom text reads 'Translating Logical Address into Physical Address,' reinforcing the process being demonstrated.

The lesson effectively bridges the gap between segmentation and paging. By using a segment table to point to individual page tables, the system gains the flexibility of variable-sized segments while maintaining the non-contiguous, fixed-size allocation of pages. This structure allows for efficient memory management where the overhead of fragmentation is reduced, and the logical view of the program (segments) is preserved. The visual tracing of the address bits through the tables reinforces the hardware mechanism required for this translation, showing how the CPU uses the STBR and segment number to find the correct page table before calculating the final physical address.

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