操作系统英文版课件：第3章 进程描述和控制.pdf

Chapter 03 Process Description and Control 进程描述和控制 Learning Objectives  Define the term process and explain the relationship between processes and process control blocks  Explain the concept of a process state and discuss the state transitions the processes undergo  List and describe the purpose of the data structures and data structure elements used by an OS to manage processes  Assess the requirements for process control by the OS  Understand the issues involved in the execution of OS code Dr. GuoJun LIU Operating System Slides-3 Outline  What Is a Process?  Process States  Process Description  Process Control  Execution of the Operating System Dr. GuoJun LIU Operating System Slides-4 The concept of process is fundamental to the structure of modern computer operating systems. Its evolution in analyzing problems of synchronization, deadlock, and scheduling in operating systems has been a major intellectual contribution of computer science. -- WHAT CAN BE AUTOMATED?: THE COMPUTER SCIENCE AND ENGINEERING RESEARCH STUDY, MIT Press, 1980 Summary of Earlier Concepts  A computer platform  The OS was developed to consists of a collection of provide a convenient, hardware resources feature-rich, secure, and consistent interface for  Computer applications are applications to use developed to perform some task  We can think of the OS as providing a uniform,  It is inefficient for