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CGS 3763 Operating System Concepts Fall 2014 Euripides Montagne

CGS 3763 Operating System Concepts Fall 2014 Euripides Montagne. TODAY ’ S AGENDA. Go over course syllabus. What is an operating system? Class make up - who ’ s enrolled Major or Minor? Computer Science, IT or MIS Other computer science courses: CGS 1060 is minimum prerequisite

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CGS 3763 Operating System Concepts Fall 2014 Euripides Montagne

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  1. CGS 3763Operating System ConceptsFall 2014Euripides Montagne

  2. TODAY’S AGENDA • Go over course syllabus. • What is an operating system? • Class make up - who’s enrolled • Major or Minor? • Computer Science, IT or MIS • Other computer science courses: • CGS 1060 is minimum prerequisite • CGS 3269 would be very helpful • Programming experience will also be helpful although no programming projects required for this course

  3. SYLLABUS OVERVIEW • Office Hours • Euripides Montagne: HEC 217 MWF 11:00 a.m. to 12:00 (Noon) (HEC 217) T 2:00 p.m. to 3:00 p.m. (HEC 217) Email • eurip@eecs.ucf.edu (include CGS3763 in subject line) • Be professional in your correspondence • Website • http://www.eecs.ucf.edu/~eurip (there you will find a link to CGS3763) • Be sure to take notes in class • Text Book • Operating System Principles and Practice, 2e, Thomas Anderson and Michael Dahlin, 2014, Recursive Books, Ltd.

  4. SYLLABUS OVERVIEW • TA • Amir Mazaheri • Office hours: Wed: 10:00 a.m. to 12:00 p.m. (HEC 254) Email: amirmazaheri1990@gmail.com • (include CGS3763 in subject line) • Be professional in your correspondence

  5. SYLLABUS OVERVIEW (cont.) • Class Times • Mon, Wed & Fri, 1:30 p.m. - 2:20 p.m., CB2 206 • Final Exam • http://www.registrar.sdes.ucf.edu/calendar/exam/2014/fall/ • It will be comprehensive • Other Dates • Withdrawal deadline: Monday, October 27, 2014 • Classes end: Monday, December 1, 2014

  6. SYLLABUS OVERVIEW (cont.) • Attendance • Not taken but strongly encouraged • Homework exercises will be assigned • Turned in during class or Webcourses. • Answers given in class only. • Tests & Exams • Closed book, closed notes • Essay • Simple calculators only • Academic Behavior • Cheating or other forms of academic dishonesty will not be tolerated • Please turn off all cell phones, tablets and laptops in class.

  7. SYLLABUS OVERVIEW (cont.) • Grading Based on: • Homework 20% • First Midterm 25% • Second Midterm 25% • Final Exam 30% • Guaranteed Grading Scale: •   A 90 – 100% (88 – 89) = A- (86 - 87) = B+ • B 80 – 85% (78 – 79) = B- (76 – 77) = C+ • C 70 – 75% (68 – 69) = C- (66 – 67) = D+ • D 60 – 65% (58 – 59) = D- • F Otherwise

  8. SYLLABUS OVERVIEW (cont.) • Take advantage of multiple resources • Classroom lectures • Required text book • Lecture slides and review exercises • Publishers web site and slides • Use the internet or other text books • See me during office hours or email

  9. COURSE CONTENT • Not a course in Windows, Mac or Unix. • Not a point & click, “how to” course. • Instead we will look at the basic concepts that underlie these and other operating systems. • Processes & threads, • CPU scheduling, • memory and secondary storage management, • protection and security, • distributed systems • Why? • Dispel some of the mystery - understand what happens when you point and click. • Learn new algorithms - many OS concepts can be applied to other disciplines.

  10. TENTATIVE COURSE CALENDAR • Introduction • Computer System Structures • Operating System Structures • Processes • Threads • First Midterm (September 24 and 26) • CPU Scheduling • Process Synchronization • Deadlocks • Basic Memory Management • Second Midterm (October 29 and 31)

  11. TENTATIVE COURSE CALENDAR (cont.) • Virtual Memory • File Systems • Mass Storage Structures • Final Exam (December 8) • See UCF’s final exam schedules posted at: http://www.registrar.sdes.ucf.edu/calendar/exam/2014/fall/

  12. WHAT IS AN OPERATING SYSTEM? • Definition varies depending on who you ask: • resource allocator • master control program • everything vendor ships with the computer • program that is always running (kernel)

  13. WHAT IS AN OPERATING SYSTEM? • For purposes of our class an operating system: 1) is the interface or intermediary between a user/application and the computer hardware 2) provides an environment in which the user can execute programs conveniently and • application and/or system software 3) manages the computer’s resources efficiently • memory, disk space, CPU time, I/O, software, etc. • Often an OS is a tradeoff between convenience and efficiency • Windows (GUI) vs. Unix (command interpreter)

  14. OS AS INTERMEDIARY • We’ll discuss hardware later in Chapter 2. • What’s an application? • Software to accomplish a task • Spread sheet, word processor, browser, email • What about system software? • Depending on who you ask, can be considered application programs, a computer resource, or part of the OS

  15. WHAT IS A PROCESS?

  16. WHAT IS A PROCESS (cont.) • A process: • is a program in execution. • has a process control block (PCB) • The PCB has a program counter (PC) • A process can have one or more threads. • A thread is sometimes known as a lightweight process

  17. RUNNING MULTIPLE PROGRAMS • Parallel/Simultaneous Execution • Two or more processes performing the same activity at the same time • Requires two or more of the same resource (e.g., processors, printers, disk drives) • Concurrent Execution • Two or more processes executing at the same time but doing different activities on different devices. • Processes take turns using single shared resource • Gives the illusion of parallel processing

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