A Simple Example And Overview
Explore how paging works as a memory management technique by examining a simple example of virtual and physical memory mapping. Understand the role of page tables, virtual page numbers, offsets, and the translation process that converts virtual addresses to physical addresses. This lesson also highlights the advantages of paging such as flexibility and simplicity in managing memory.
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To help make this approach more clear, let’s illustrate it with a simple example.
Example
The figure below presents an example of a tiny address space, only 64 bytes total in size, with four 16-byte pages (virtual pages 0, 1, 2, and 3).
Real address spaces are much bigger, of course, commonly 32 bits and thus 4-GB of address space or even 64 bits; in the course, we’ll often use tiny examples to make them easier to digest.
Physical memory, as shown in the figure below, also consists of a number of fixed-sized slots, in this case, eight page frames (making ...
As you can see in the diagram, the pages of the virtual address space have been ...