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CS 423 – Operating Systems Design Lecture 1 - Introduction

CS 423 – Operating Systems Design Lecture 1 - Introduction. Klara Nahrstedt Fall 2011. Overview. Course information (personnel, policy, schedule, misc.) What is OS? What does it do? History of OS Summary. Instructor. Klara Nahrstedt PhD University of Pennsylvania in 1995 Research:

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CS 423 – Operating Systems Design Lecture 1 - Introduction

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  1. CS 423 – Operating Systems DesignLecture 1 - Introduction Klara Nahrstedt Fall 2011 CS 423 - Fall 2011

  2. Overview • Course information (personnel, policy, schedule, misc.) • What is OS? What does it do? • History of OS • Summary CS 423 - Fall 2011

  3. Instructor • Klara Nahrstedt • PhD University of Pennsylvania in 1995 • Research: • Multimedia distributed systems (overlay multicast, peer-to-peer systems, service composition), • Multimedia operating systems (soft-real-time scheduling, caching), • Multimedia networking (routing, QoS management, pricing, security), • Multimedia applications (multi-camera tele-immersive systems) • Mobile Peer-to-Peer Systems – Content Distribution • Resource Management in Wireless 802.11 Networks • Power-aware OS in mobile devices • Mobility Patterns in Mobile Learning Communities CS 423 - Fall 2011

  4. Office Assistants: Lynette Lubben (llubben@illinois.edu) for Klara Nahrstedt Teaching Assistants: Raoul Rivas (trivas@illinois.edu) Keun Soo Yim (yim6@illinois.edu) (Online TA) Class Website http://www.cs.illinois.edu/class/fa11/cs423/ Newsgroup: uiuc.class.cs423 and uiuc.class.cs423.announce Two newsgroups – one for discussion on machine problems, one for announcements Overview CS 423 - Fall 2011

  5. Required Readings for cs423 • Required Textbook: • Modern Operating Systems, Andrew S. Tanenbaum, Prentice Hall, third edition, 2008 • Recommended Textbooks: • Linux Kernel Development, Robert Love, Safari Online Book, 2010, 3rd edition. • Linux Device Drivers, Corbet, Rubini, Kroah-Hartman, O’REILLY, 2005, 3rd edition. • Pro Android 2, Hashimi, Komatineni, MacLean, Apress, 2010. • But mostly online resources CS 423 - Fall 2011

  6. Course Prerequisites • CS 241 – MUST (or similar course) • There will be a test similar to exams of cs241 (take-home exam – not graded – it is for your own evaluation) • If you can finish more than 80% of the exam, you should be fine in the class • If you cannot finish the exam with 70% and lower, then it means that you should consider sitting in cs241 or taking it first • Take-home exam will be posted on 8/26 • Solutions to take-home exam will be posted on 9/1 CS 423 - Fall 2011

  7. Facilities and Office Hours • Laboratory Facilities • CSIL- linux and windows machines, 216 SC, • Starting October 14, we will start leasing Android phones for MP3 and MP4 assignments. • Nexus-S and Droid phones • Office hours: available in web page • For online students: • we will have collaborative tool ‘elluminate’ - will be available for online TA office hours • Otherwise use with Instructor/TAs to communicate • Skype, Email, Chat – text messaging CS 423 - Fall 2011

  8. Online Students Recording links sent by email to online students There will be link from class website to the recording server for all students (protected by password after two weeks) CS 423 - Fall 2011

  9. Principles System concepts OS design Algorithms Policies Rationale Practice Goals Understand OS decisions Basis for future learning Get hands dirty Linux and/or Android About this course… CS 423 - Fall 2011

  10. Fast pace Hard material 4 MPs (programming) 2 Homework 1 Midterm and 1 Final (Comprehensive) Exam But…. Students survived past cs423! Expect (Some) Pain Source: http://en.wikipedia.org/wiki/Ben_Bernanke CS 423 - Fall 2011

  11. Grading • Final exam: 35% • Mid-exam: 20% • 2 Homework: 10% • 4 MPs: 35% • 1stMP – not graded • but absolutely essential to do – practice to work with the Linux • 2nd MP – 11% - major Linux scheduling problem • 3rd MP – 11% - resource management problem (power, file system, memory …) • Two options: Linux or Android • 4th MP – 13% - distributed load management • Two options: Linux or Android CS 423 - Fall 2011

  12. Grading policy • Gradebook system: http://compass.uiuc.edu • Late policy for MPs and Homework Assignments • No Late Policy, but there will be 3Bonus Days (can’t take all three bonus days for one MP!) • It is your responsibility! • Check announcements in lectures, newsgroups, or web pages • MPs will be done in Groups of 2-3 students • MPs done on vmware server CS 423 - Fall 2011

  13. Group Setup • Setup Groups between 8/22 and 8/24 • By evening of 8/24, you should setup groups on compass.illinois.edu (under cs423 Fall 2011 class) by filling out the form under “MP Sign up” • If there are any issues, email to the TA (Raoul Rivas - trivas@illinois.edu) • Specify name of the group members and netid of group members • David Andersen (system admin) will setup accounts on the vmware server. • Between 8/27 and 29 the TA will inform each group their login and password to start to work on the vmware server • The instructions about working on the vmware server will be also posted on class web and compass. CS 423 - Fall 2011

  14. Re-grading policy • Students have 1 week (after the grade for a Homework/MP/exam is released into compass gradebook) to request for re-grading • Re-grading requests need to be in writing to the TAs • After the re-grading period, no re-grading request will be granted for this Homework/MP/exam. CS 423 - Fall 2011

  15. Cheating Policy • Academic integrity • https://wiki.engr.illinois.edu/display/undergradProg/Honor+CodeYour homework and exams must be your own - we have a zero tolerance policy towards cheating of any kind. • FIRST OFFENSE – 0 points on any homework, exam, MP, • SECOND OFFENSE - F - failing grade in the course. • Both the cheater and the student who aided the cheater will be held responsible for the cheating • Machine problems will be graded per group, i.e., each member gets the same number of points. CS 423 - Fall 2011

  16. Lecture Format • Help you understand important and hard OS concepts • Lectures do not cover everything • Not all questions in homework or exams are from lectures (read textbook) • Students responsibility • Attend lectures • Read textbooks • Homework, MP, Exam, Interviews • Periodically check web page • Read/utilize newsgroup CS 423 - Fall 2011

  17. MPs (Deadlines) CS 423 - Fall 2011

  18. Homework & Exams • Announcement in web page/newsgroup/compass • No makeup homework • No makeup exams unless with documented medical emergency CS 423 - Fall 2011

  19. ¼ Unit Project: graduate students • Final grade is decided upon ¾ unit performance • ¼ unit project: pass or fail • Individual or group of two • Choices • Implementation project, Animation project, Survey • Proposal due: 9/16, Friday, 5pm • Write: ½ - 1 page of proposal in ascii or pdf format • Specify: (a) scope of the problem, (b) problem description, (c) deliverables, (d) timelines. • Email to klara@illinois.edu • Details in web page CS 423 - Fall 2011

  20. “Code” that: Sits between programs & hardware Sits between different programs Sits betweens different users But what does it do? to provide an orderly and controlled allocation of the processors, memories and I/O devices among the various programs competing for them What Is an OS? CS 423 - Fall 2011

  21. Resources Allocation Protection Reclamation Virtualization Services Abstraction Simplification Convenience Standardization What Is an OS? Makes computers simpler CS 423 - Fall 2011

  22. Resources Allocation Protection Reclamation Virtualization Finite resources Competing demands Examples: CPU Memory Disk Network What Is an OS? CS 423 - Fall 2011

  23. Resources Allocation Protection Reclamation Virtualization You can’t hurt me I can’t hurt you Implies some degree of safety & security What Is an OS? CS 423 - Fall 2011

  24. Resources Allocation Protection Reclamation Virtualization The OS gives The OS takes away Voluntary at run time Implied at termination Involuntary Cooperative What Is an OS? CS 423 - Fall 2011

  25. Resources Allocation Protection Reclamation Virtualization illusion of infinite, private resources Memory versus disk Timeshared CPU What Is an OS? CS 423 - Fall 2011

  26. History of Operating Systems (1) • First generation 1945 – 1955 • vacuum tubes, plug boards (no OS) • Second generation 1955 – 1965 • transistors, batch systems • Third generation 1965 – 1980 • ICs and multiprogramming • Fourth generation 1980 – present • personal computers, hand-held devices, sensors CS 423 - Fall 2011

  27. History of Operating System (1945-55) Early batch system • bring cards to 1401 • read cards to tape • put tape on 7094 which does computing • put tape on 1401 which prints output CS 423 - Fall 2011

  28. History of Operating Systems (1955-65) • Structure of a typical JCL job – 2nd generation • Single user • Programmer/User as the operator • Secure, but inefficient use of expensive resources • Low CPU utilization-slow mechanical I/O devices CS 423 - Fall 2011

  29. History of Operating Systems (1965-80) • Multiprogramming system • Three jobs in memory – 3rd generation • Spooling - use disk as a very large buffer for input/output devices • Polling/Interrupts, Timesharing CS 423 - Fall 2011

  30. The Operating System Zoo (1980-present) • Mainframe operating systems • Server operating systems • Multiprocessor operating systems • Personal computer operating systems • Real-time operating systems • Embedded operating systems • Smart card operating systems CS 423 - Fall 2011

  31. Summary • Course overview • Policy and requirement • What is OS? • OS history • Next lecture: OS architectures/system overview CS 423 - Fall 2011

  32. After this lecture… • Reading assignment: chapter 1.1-1.4 • Browse the web site • Subscribe to newsgroup • Login to csil machines, compass, … • Setup Groups: 8/22-8/26(fill out form on compass and submit the form) • Think about what are the criteria to evaluate an OS? CS 423 - Fall 2011

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