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Operating system basics

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  • Operating System Basics .What is an Operating System • Resource Manager - Resource include: CPU, memory, disk, network - OS allocates and de-allocates these resources • Virtual Machine - provides an abstraction of a larger (or

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  • Basic Concepts Scheduling Criteria Scheduling Algorithms Multiple-Processor Scheduling Real-Time Scheduling Thread Scheduling Operating Systems Examples Java Thread Scheduling Algorithm Evaluation Silberschatz, Galvin and Gagne ©2005 .Basic Concepts Maximum CPU utilization obtained with multiprogramming CPU–I/O Burst Cycle – Process execution consists of a cycle of CPU execution and I/O wait CPU burst distribution Silberschatz, Galvin and Gagne ©2005 .Alternating Sequence of CPU And I/O Bursts...

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  • To provide a grand tour of the major operating systems components To provide coverage of basic computer system organization Operating System Concepts – 7th Edition, Jan 12, 2005 Silberschatz, Galvin and Gagne ©2005 .What is an Operating System? A program that acts as an intermediary between a user of a computer and the computer hardware. Operating system goals: Execute user programs and make solving user problems easier. Make the computer system convenient to use. Use the computer hardware in an efficient manner....

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  • Lecture Operating System: Chapter 09 - Security presented The security environment, Basics of cryptography, User authentication, Attacks from inside the system, Attacks from outside the system, Protection mechanisms, Trusted systems.

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  • An operating system is a type of system software that acts as the master controller for all activities that take place within a computer system

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  • Lecture Operating System: Chapter 04 - Memory management presented basic memory management, swapping, virtual memory, page replacement algorithms, modeling page replacement algorithms, design issues for paging systems, implementation issues, segmentation.

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  • ating systems written in C, a high-level programming language, and its natural portability and low price made it a popular choice among universities. Initially, two main dialects of Unix existed: one produced by AT&T known as System V, and one developed at UC Berkeley and known as BSD. In recent years, many other dialects have been created, including the highly popular Linux operating system and the new Mac OS X (a derivative of BSD).

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  • After studying this chapter, you should be able to: Describe the basic elements of a computer system and their interrelationship, eplain the steps taken by a processor to execute an instruction, discuss the evolution of operating systems for early simple batch systems to modern complex systems.

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  • .This lesson includes the following sections: • Average Access Time • File Compression • Data-Transfer Rate • Drive-Interface Standards .Average Access Time • In storage devices, average access

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  • Operating System: Chapter 4 - Memory Management provides about Basic memory management, Swapping, Virtual memory, Page replacement algorithms, Modeling page replacement algorithms, Design issues for paging systems, Implementation issues, Segmentation.

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  • Lecture Operating system concepts (Sixth ed) - Chapter 1: Introduction. In this chapter, you will learn to: To describe the basic organization of computer systems, to provide a grand tour of the major components of operating systems, to give an overview of the many types of computing environments, to explore several open-source operating systems.

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  • The role of the operating system in computer I/O is to manage and control I/O operations and I/O devices. Although related topics appear in other chapters, here we bring together the pieces to paint a complete picture of I/O. First, we describe the basics of I/O hardware. Next, we discuss the I/O services provided by the operating system and the embodiment of these services in the application I/O interface. Then, we explain how the operating system bridges the gap between the hardware interface and the application interface.

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  • Lecture "Operating system - Chapter 4: Memory management" has contents: Basic memory management, swapping, virtual memory, page replacement algorithms, modeling page replacement algorithms, design issues for paging systems, implementation issues, segmentation.

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  • Lecture "Operating system - Chapter 9: Security" has contents: The security environment, basics of cryptography, user authentication, attacks from inside the system, attacks from outside the system, protection mechanisms, trusted systems.

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  • In this chapter, the following content will be discussed: Basic concepts, scheduling criteria, scheduling algorithms, thread scheduling, multiple-processor scheduling, real-time CPU scheduling, operating systems examples, algorithm evaluation.

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  • Module 1 - Introduction. In this chapter, you will learn to: To describe the basic organization of computer systems, to provide a grand tour of the major components of operating systems, to give an overview of the many types of computing environments, to explore several open-source operating systems.

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  • Module 2 - Computer-system structures. Chapter 2 discusses the general structure of computer systems. It may be a good idea to review the basic concepts of machine organization and assembly language programming. The students should be comfortable with the concepts of memory, CPU, registers, I/O, interrupts, instructions, and the instruction execution cycle. Since the operating system is the interface between the hardware and user programs, a good understanding of operating systems requires an understanding of both hardware and programs.

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  • Module 5 - CPU scheduling. CPU scheduling is the basis of multiprogrammed operating systems. By switching the CPU among processes, the operating system can make the computer more productive. In this chapter, we introduce the basic scheduling concepts and discuss in great length CPU scheduling. FCFS, SJF, Round-Robin, Priority, and the other scheduling algorithms should be familiar to the students.

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  • In this chapter, you will learn to: To describe the basic organization of computer systems, to provide a grand tour of the major components of operating systems, to give an overview of the many types of computing environments, to explore several open-source operating systems.

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  • In this chapter, you will learn to: To describe the basic organization of computer systems, to provide a grand tour of the major components of operating systems, to give an overview of the many types of computing environments, to explore several open-source operating systems.

    ppt35p nanhankhuoctai10 23-07-2020 6 0   Download

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