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Hands-On System Programming with Linux
book

Hands-On System Programming with Linux

by Kaiwan N. Billimoria, Tigran Aivazian
October 2018
Beginner content levelBeginner
794 pages
19h 23m
English
Packt Publishing
Content preview from Hands-On System Programming with Linux

Virtual memory

Unfortunately, the term virtual memory (VM) is often misunderstood or hazily understood, at best, by a large proportion of engineers. In this section, we attempt to clarify what this term and its associated terminologies (such as memory pyramid, addressing, and paging) really mean; it's important for developers to clearly understand this key area.

First, what is a process? A process is an instance of a program in execution. A program is a binary executable file: a dead, disk object. For example, take the cat program:$ ls -l /bin/cat -rwxr-xr-x 1 root root 36784 Nov 10 23:26 /bin/cat $ When we run cat it becomes a live runtime schedulable entity, which, in the Unix universe, we call a process.

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Publisher Resources

ISBN: 9781788998475Supplemental Content