PPT-On the Duality of Operating System Structures

1 Hugh C Lauer Xerox Corporation Palo Alto Californi a Roger M Needham Cambridge University Cambridge England Proc Second International Symposium on Operating Systems IRIA Oct 1978. 1 What is the purpose of system calls Answer System calls allow userlevel processes to request services of the operating system 22 What are the 64257ve major activities of an operating system with regard to process management Answer The 64257ve major LP Duality YiZhang Yi Outline Outline DualofLPs Dual Strong Duality No gap: primal optimal, dual opitmal Nogap:primalinfeasibledualunbounded No infeasible No gap: primal unbounded, dual infeasible Ifi . C. ontents. What is an Operating System. ?. Operating System Objectives. Services Provided by the Operating System. . Functions of an Operating System on a Network. Types of Operating Systems. Simple Batch Systems. CS 3100 Operating-System Structures. 1. Objectives. To describe the services an operating system provides to users, processes, and other systems. To discuss the various ways of structuring an operating system. A program that controls the execution of application programs. An interface between applications and hardware. 2. Operating System Objectives. Convenience. Makes the computer more convenient to use. Efficiency. Eighth Edition. By William Stallings. Operating Systems:. Internals and Design Principles. System Access Threats. Intruders . Malicious Software. Programs that exploit vulnerabilities in computing systems. The programs that control and maintain the operation of the computer and its devices. The two parts of system software are the Operating System (OS) and utility programs.. Operating system (OS) (sometimes called the platform) coordinates all activities among computer hardware resources, applications and the user.. The programs that control and maintain the operation of the computer and its devices. The two parts of system software are the Operating System (OS) and utility programs.. Operating system (OS) (sometimes called the platform) coordinates all activities among computer hardware resources, applications and the user.. Chapter 3 Operating Systems Concepts 1 A Computer Model An operating system has to deal with the fact that a computer is made up of a CPU, random access memory (RAM), input/output (I/O) devices, and long-term storage. System Principles . Peter Reiher. . Outline. Administrative materials. Introduction to the course. Why study operating systems?. Basics of operating systems. Administrative Issues. Instructor and TAs. System Principles . Peter Reiher. . Outline. Administrative materials. Introduction to the course. Why study operating systems?. Basics of operating systems. Administrative Issues. Instructor and TAs. HISTORY OF OPERATING SYS. TEM. The First Generation (1945-55) . The Second Generation (1955-65) . The Third Generation (1965-1980) . The Fourth Generation (1980-Present). 2. 1.. The First Generation (1945-55) . Lecture . 2. C. Operating System Structures . 2. References for . Lecture:. Abraham . Silberschatz. , Peter Bear Galvin and Greg Gagne, Operating System Concepts, 9th Edition, . Chapter . 2. . Contents of Lecture. – D1-branes in 2d black hole and their dual . Yasuaki. . Hikida. (Keio University). Refs.. [1] YH, V. . Schomerus. (DESY), JHEP0710(2007)064.. [2] YH, V. . Schomerus. (DESY), JHEP0903(2009)095..