L-5.9: What is Paging | Memory management | Operating System

About this Video

• Video Title: L-5.9: What is Paging | Memory management | Operating System
• Channel: Gate Smashers
• Speakers: (Speaker name not provided in transcript)
• Duration: 00:25:54

Introduction

This video explains paging in operating system memory management. It details how a process is divided into pages, loaded into main memory frames, and how the Memory Management Unit (MMU) uses page tables to translate logical addresses (generated by the CPU) into physical addresses to access data.

Key Takeaways

• Paging: Dividing a process into equally sized pages and loading them into main memory frames. Page size and frame size are identical for efficient allocation.
• Page Tables: Data structures used by the MMU to map logical addresses (generated by the CPU) to physical addresses in main memory. Each process has its own page table. Each entry in a page table contains the frame number where the corresponding page resides.
• Logical Address: The address generated by the CPU. It's composed of a page number and a page offset.
• Physical Address: The actual location of a byte in main memory. It consists of a frame number and a frame offset. The number of bits to represent it depends on main memory size.
• Memory Management Unit (MMU): Hardware that translates logical addresses to physical addresses using page tables.