Book Image

Parallel Programming with Python

By : Jan Palach, Jan Palach V Cruz da Silva
Book Image

Parallel Programming with Python

By: Jan Palach, Jan Palach V Cruz da Silva

Overview of this book

Table of Contents (16 chapters)
Parallel Programming with Python
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Index

Understanding the concept of a process


We must understand processes in operating systems as containers for programs in execution and their resources. All that is referring to a program in execution can be managed by means of the process it represents—its data area, its child processes, its estates, as well as its communication with other processes.

Understanding the process model

Processes have associated information and resources that allow their manipulation and control. The operating system has a structure called the Process Control Block (PCB), which stores information referring to processes. For instance, the PCB might store the following information:

  • Process ID: This is the unique integer value (unsigned) and which identifies a process within the operational system

  • Program counter: This contains the address of the next program instruction to be executed

  • I/O information: This is a list of open files and devices associated with the process

  • Memory allocation: This stores information about...