Operating System

Operating System

1. Organization

   • Memory
     • CPU
       • Main Memory
     • Graphics Adapter
     • I/O
       • Disk Controller
       • USB Controller
       • System Call
       • Device Status Table

2. Architecture

   • Multiprocessors
     • Parallel Systems
     • Tightly-coupled Systems
     • Advantages
       • Increase Throughput
       • Economy of scale
       • Increased Reliability
         • Graceful Degradation
         • Fault Tolerance
     • Types
       • Asymmetric
       • Symmetric

3. Structure

   • Users
   • Multiprogramming
     • Job Scheduling
     • Timesharing / Multitasking
       • Interactive
         • Response Time < 1 Sec.
         • Process
         • CPU Scheduling
         • Swapping
         • Virtual Memory

4. Operation

   • I/O - CPU Concurrently
   • Device Type Controller
     • Local Buffer
     • CPU - Interrupt
       • Interrupt Vector
       • Interrupt Driven

5. Management

   • Process
   • Memory
   • Storage
     • Main Memory
     • Secondary Storage
     • Magnetic Disk
       • Tracks
       • Sectors
     • Hierarchy
       • Speed
       • Cost
       • Volatility
     • Caching

6. Protection / Security

   • Priviledge Scalation

7. Systems

   • Distributed
   • Special-Purpose

8. Open Source

   • DRM
   • FSF
   • GNU / GPL