• Dates: 1/14/03 and 1/16/03.
• Reading: Ch1, Ch2 (very briefly), Ch3.

General information about CSE 5343/7343

• General course information: See the online syllabus for the following information:
  • objective
  • professor/office hours/etc.
  • textbook
  • course work and grading
  • rules and responsibilities
  • topics and schedule
• what you will learn: OS and Sys S/w
• what is OS?
• what you will not learn: details of specific OS's
• what you are expected to know already:
  • general CS knowledge (CSE 2353, 3358 etc.)
  • programming knowledge: (as in CSE 1341 and 2341)
  • computer organization/architecture (Ch2, and CSE 2340)
• what are the followups:
  • Advanced OS (CSE 8343)
  • other advanced course in CS/CpE/SE programs

What is OS

• what is a computer system?
  • hardware + software (+ network)
  • hardware = ?
    computation + storage + interface
  • software = ?
    purpose, language, development
  • layered structure
• OS as part of a computer system
  • layers or hierarchies: Fig. 1.1 (p.4)
    alternative view: wrapped around ("onion")
  • main functions?
    to upper layer: service provider, convenience + usability
    to lower layer: resource manager, correctness + efficiency
  • historical perspectives on its main functions
    shifting focus
  • where does it fit in?
• what does it contain?
  topics to be covered in CSE 5343/7343

History and Structure of OS

• many features, evolved over time
• connection to hardware technology/computer architecture?
  • time-line?
  • components and organization: computer architecture, Ch2
    process/CPU management
    memory and storage management
• connection to software technology?
  • language and compiler
  • development technology
  • shifting focus
• general: single user -> batch -> time sharing
• diversity: parallel, real-time, distributed OS
• OS services and features
  • basic execution and resource management
  • human/machine interface:
    command interpreter (high level) and
    system calls (low level)
  • implication of multiprogramming:
    protection and security, IPC, etc.
  • feature migration (& timeline): Fig. 1.6 (p.20)
  • services listed in Ch3.2:
    primary: execution, I/O, files, communication, error detection
    secondary: resource allocation, accounting, protection
• OS structure
  • many components: process, memory, I/O, IPC, etc.
    how to organize them? => OS structure
  • simple (not-much) structure: DOS, original UNIX
  • layered approach
    connection to software technology SD/SP
    use of kernels
    API defined by system calls
    Mach and microkernel
    basic idea: support/dependencies/divide-and-conquer
• OS structure diagrams: Fig 3.6 - 3.10 (pp.75-80)
• virtual machine concept Fig 3.11, p.81
• Java virtual machine Fig 3.12, p.85