Book Image

C++ System Programming Cookbook

By : Onorato Vaticone
Book Image

C++ System Programming Cookbook

By: Onorato Vaticone

Overview of this book

C++ is the preferred language for system programming due to its efficient low-level computation, data abstraction, and object-oriented features. System programming is about designing and writing computer programs that interact closely with the underlying operating system and allow computer hardware to interface with the programmer and the user. The C++ System Programming Cookbook will serve as a reference for developers who want to have ready-to-use solutions for the essential aspects of system programming using the latest C++ standards wherever possible. This C++ book starts out by giving you an overview of system programming and refreshing your C++ knowledge. Moving ahead, you will learn how to deal with threads and processes, before going on to discover recipes for how to manage memory. The concluding chapters will then help you understand how processes communicate and how to interact with the console (console I/O). Finally, you will learn how to deal with time interfaces, signals, and CPU scheduling. By the end of the book, you will become adept at developing robust systems applications using C++.
Table of Contents (13 chapters)

Learning about processor affinity

In a multi-processor environment, the scheduler has to deal with task allocation on multiple processors or cores. From a Linux perspective, processes and threads are the same thing; both are represented by the struct task_struct kernel structure. There may be the need to force two or more tasks (that is, threads or processes) to run on the same processor to leverage, for example, the cache by avoiding the cache invalidation. This recipe will teach you how to set a hard affinity on a task.

How to do it...

In this recipe, we'll develop a small piece of software in which we'll force it to run on a CPU:

  1. On a shell, open a new source file called schedAffinity.cpp. What we want is...