Chapter#8 || Main Memory part 1 || Operating System

Chapter 8: Memory Management || outline
Background
Swapping
Contiguous Memory Allocation
Segmentation
Paging
Structure of the Page Table
Example: The Intel 32 and 64-bit Architectures
Example: ARM Architecture
Objectives of this chapter
To provide a detailed description of various ways of organizing memory hardware
To discuss various memory-management techniques, including paging and segmentation
To provide a detailed description of the Intel Pentium, which supports both pure segmentation and segmentation with paging
Background
Program must be brought (from disk) into memory and placed within a process for it to be run
Main memory and registers are only storage CPU can access directly
Memory unit only sees a stream of addresses + read requests, or address + data and write requests
Register access in one CPU clock (or less)
Main memory can take many cycles, causing a stall
Cache sits between main memory and CPU registers
Protection of memory required to ensure correct operation