1 / 18

Understanding Operating Systems: Overview and Evolution in Technology

Explore the fundamental components and evolution of operating systems, from process and memory management to networking protocols and security features. Learn about key aspects such as interrupts, file systems, device drivers, and I/O history. Dive into the history of operating systems, from the first generation to modern-day advancements in real-time, distributed, and embedded systems. Understand the different generations of operating systems and the various types of multitasking and user interfaces. Discover examples of popular operating systems like UNIX, Mac OS, Google Chrome, AmigaOS, and Microsoft Windows.

kinsey
Download Presentation

Understanding Operating Systems: Overview and Evolution in Technology

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Operating Systems Sameer Mahajan

  2. Overview • Process management • Interrupts • Memory management • File system • Device drivers • Networking (TCP/IP, UDP) • Security (Process/Memory protection) • I/O

  3. History • 1940’s First Generation – no OS • 1950’s Second Generation – single stream batch • 1960’s Third Generation – multiprogramming batch • Fourth Generation – microprocessor

  4. Types • Realtime • Single user vs. Multi user • Multi-tasking vs. Single-tasking • Distributed • Embedded

  5. Examples • UNIX – 1% • Mac OS (Lion, Snow Leaopard, Leopard, X Server) – 6% • Google chrome • AmigaOS • MS Windows (8, 7, Vista, XP, w2k8, w2k3) – 90% • Mobile Devices – iOS, Android, Windows Phone 7, Symbian

  6. Components • Kernel • Program Execution (Process) • Interrupts • Modes • Memory Management – virtual vs physical • Multitasking – scheduling • File systems – VFS • Device drivers • Networking • Security • User interface (GUI, CLI)

  7. Kernel

  8. File system • Boot block • Super block • Inode Table • Data blocks • User File Descriptor (FD) table • File Table • ls, df, mount (UNIX); Explorer (windows)

  9. File system

  10. Process • Unit of execution • User and kernel mode • Context: stack, registers, PC • thread • Virtual memory – physical memory • ps (UNIX); Process Explorer (Windows)

  11. Process Management

  12. Scheduling Algorithms • FCFS Scheduling • Round Robin Scheduling • Priority Scheduling • Multilevel Queue Scheduling • Multilevel Feedback Queue Scheduling • SJF Scheduling •  SRT Scheduling

  13. IO subsystem • Open, close, read, write • Character device – ioctl • Block device – strategy • Major, minor device number • Stream – full duplex connection • Buffer cache • Memory mapped IO

  14. Inter process communication • Messages (msg*) • Shared memory (shm*) • Semaphores (sem*) • Sockets • Pipes

  15. Windows 8 features • Metro User Interface • Internet Explorer 10 • Apps and App Store • New Hardware and Form Factors – multitude of devices (touch is primary interface) • Security Changes • Storage Changes (de-dupe, live disk repair) • Virtualization Changes

  16. Hardware Virtualization

More Related