Lecture Operating systems: Chapter 5 - Dhananjay M. Dhamdhere

This chapter begins by discussing how an application creates processes through system calls and how the presence of many processes achieves concurrency and parallelism within the application. It then describes how the operating system manages a process - how it uses the notion of process state to keep track of what a process is doing and how it reflects the effect of an event on states of affected processes. The chapter also introduces the notion of threads, describes their benefits, and illustr

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Chapter 5 Processes and Threads Copyright © 2008 Introduction • Processes and Programs • Implementing Processes • Threads • Case Studies of Processes and Threads Operating Systems, by Dhananjay Dhamdherehamdhere 5.2 2 Copyright © 2008 Processes and Programs • What Is a Process? • Relationships between Processes and Programs • Child Processes • Concurrency and Parallelism Operating Systems, by Dhananjay Dhamdherehamdhere 5.3 3 Copyright © 2008 What Is a Process? • A process comprises six components: – (id, code, data, stack, resources, CPU state) Operating Systems, by Dhananjay Dhamdherehamdhere 5.4 4 Copyright © 2008 Relationships between Processes and Programs • A program is a set of functions and procedures – Functions may be separate processes, or they may constitute the code part of a single process Operating Systems, by Dhananjay Dhamdherehamdhere 5.5 5 Copyright © 2008 ... - tailieumienphi.vn

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