Operating Systems
Courses in operating systems cover the design of the components of an operating system—scheduler, memory manager, file system, etc. Only a small fraction of programmers ever write this kind of code, though. On the other hand, they can access many features of the OS using system calls such as fork, wait, exec, etc. This level of programming is not generally covered in any course. In Chapter 8, we describe process management, and how programmers can make use of the process control features of Unix and Linux.
Other Topics
We cover a wide range of systems topics, all from a programmer's perspective. Besides those mentioned above, these include machine-level programming, optimizing compilers, processor architecture, linking, performance measurement, virtual memory, I/O, network programming and concurrency. In viewing what to cover about a subject and how to present it, we have used the filter “How could a sophisticated application programmer make use of this material?”
Key Points
The material in this book has direct value for programmers. Students find that it explains many of the mysterious problems they've already encountered, that it helps them write and debug code more efficiently, and that their programs are more reliable and efficient. Even if this is the only systems course they ever take, they will have achieved a higher level of competence than many entry-level programmers.
The material in this book is unique. Much of it is not presented in any other book or taught in previous courses. Instead, a traditional coverage of systems requires programmers to figure out on their own how the characteristics of the systems they study in builder-centric courses can be exploited to improve their programs. Programmers must struggle through confusing Unix man pages or read advanced systems programming books just to use the simple process control functions provided by Unix.
The book provides a solid foundation for builder-centric courses. We believe that more advanced systems courses should present systems from a builder's perspective. Students will be much better oriented to the needs and constraints of these systems by first studying them from a programmer's perspective. At Carnegie Mellon, our Introduction to Computer Systems course has become a prequisite for courses in both CS and ECE covering: operating systems, networking, compilers, computer graphics, computer architecture, and embedded system design.
Copyright © 2011, 2015 Randal E. Bryant and David R. O'Hallaron翻译以上英文为中文
这篇博客是作者首次分享自己的学习经历和个人项目的总结。主要内容包括：整理所学知识点；阶段性项目总结；分享对自己有帮助的知识。
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