– explain the structure and functions of an operating system, – illustrate key operating system aspects by concrete example, and – prepare you for future courses. . .
Introduction to Operating Systems - McGraw Hill Education
understanding operating systems. You only have to know how to turn it on, call up the application program you wish to us. , perform tasks, and turn it off. If you want to get the most out of the …
What is an Operating System? Simple Batch Systems, Multiprogramming and Time Sharing systems. Personal Computer Systems, Parallel Systems, Distributed Systems and Real time Systems. Operating System Structures: Operating System Services, System components, Protection system, Operating System Services, system calls
What is an Operating System? An operating system is a program that acts as an interface between the user and the computer hardware and controls the execution of all kinds of programs. 2. What is the function of an operating System? 3. Define Memory Management. Memory management refers to management of Primary Memory or Main Memory.
Where’s the OS? • Structure: how is the OS organized? • Concurrency: how are parallel activities created and controlled? • Sharing: how are resources shared? • Naming: how are resources named by users? • Protection: how are distrusting parties protected from each other? • Security: how to authenticate, authorize, and ensure privacy?
What is an operating system? What are the primary functions of an operating system? 0x001af38... RC ... ... ... General idea of usage is to ”orchestrate” services to develop application. Why do we need distributed control algorithms? An algorithm is sometimes called protocol if it specifies coordination more than computation.
• Operating system definition – Software to manage a computer’s resources for its users and applications • OS roles – Referee, illusionist, and glue • Core ideas – Protection, concurrency, resource allocation, virtualization, reliable storage
What is an Operating System? Why? Decouple responsibilities. Key question: how do we name other applications? Need to output the result somewhere. Let the user choose! How would we implement this with pipes? With Binder? Which is better? Want to ensure output only to secure cloud storage, e.g. Dropbox folder accessible only to instructors.
Operating System Concepts –9thEdition 2.29 Silberschatz, Galvin and Gagne ©2013 Layered Approach The operating system is divided into a number of layers (levels), each built on top of lower layers. The bottom layer (layer 0), is the hardware; the highest (layer N) is the user interface. With modularity, layers are selected such that each uses
Each of the CPU, memory, and disk is a resource of the system; it is thus the operating system’s role to manage those resources, doing so efficiently or fairly or in-deed with many other possible goals in mind. To understand the role of the OS a little bit better, let’s take a look at some examples. Figure 2.1 depicts our first program.