Chrome OS is a consumer Stateless Operating System. It was designed for the era of the Internet.

1. Mark ( Chatchai )
Wangwiwattana
Computer Science
Lyle School of Engineer
Southern Methodist University
Chrome OS
The Stateless Operating System

2. http://hothardware.com
Released 2007
The beginning of netbooks era
Asus EEEPC 700

4. Chrome devices blur the line between
laptops and mobile devices

5. Acer C720 Chromebook

6. Stateless OS
1. If you throw a computer out the window, you should be able to recreate
its software, configuration, and user data bit-for-bit identically on a new
piece of hardware.
2. In any managed deployment from school workstation lab to enterprise
server room, single computers should never be modified. Instead, all
computers that need the modification should be modified in a single
step.
The idea is proposed in 2004 by Red Hat.
http://citethisbook.net/Red_Hat_Introduction_to_Stateless_Linux.html

7. Chromium OS Overview

8. Simplicity Security
Speed
Chrome OS was Designed with These Three Principles

9. Simplicity

10. Chrome OS in 2009

11. Chrome OS in 2010

12. Chrome OS in 2014
with Aura
Windows Manager
● OpenGL/ES
● XComposite extension
● ICCCM( Inter-Client Communication
Conventions Manual)
● EWHM( Extened Window Manager).

13. Speed
CPU & Memory Init
Hardware Init
Load & Start Bootloader
Load & Start Kernel
Splash Screen
Hardware Init
Splash Screen
Random Stuff
Login
Startup Application
Antivirus
Browser
Login
CPU & Memory Init
Hardware Init
Load & Start Bootloader
Load & Start Kernel
Splash Screen
Hardware Init
Splash Screen
Random Stuff
Login
Startup Application
Antivirus
Browser
Login
Traditional Desktop OS Chrome OS
Fast Boot

14. Speed
Memory
Management

15. Swap
Linux Main Memory Swap Partition

16. Swap
Chrome OS Main Memory Swap

17. Discard
Chrome OS Main Memory Swap
& Reload

18. Memory Management
10 MB
Softwall Hardwall

19. Discard
Chrome OS Main Memory Swap
& Reload
- Extend SSD Life
- Fast

20. The Downside of This Technique
It’s hard to decide what tabs to be killed.
Ex.
Music Player
Note Taking App

21. Chrome OS
Tab Priority
1. Internal pages like new tab page,
bookmarks, etc.
2. Tabs selected a long time ago
3. Tabs selected recently
4. Tabs playing audio
5. Apps running in a window
6. Pinned tabs
7. The selected tab

22. Main Memory Swap
Compressed
Memory Pull
ZSwap
ZSwap
Chrome OS

23. Security
● Verified Boot
● Auto Update and System Partitions
● Sandbox
● Encrypted User Data
● Read-only Root

24. Security
Verified Boot
Malware

25. Traditional OS
System Access

26. Security
Sandbox
Read Only

27. Security
Auto Update
& System
Partitions
Root B
State Partition
Store User Data
*Root A
* Bootable
Partition
Same SizeRead Only
Encrypted

28. Future of Chrome OS

29. Future of Chrome OS
Support Native
Android App
http://www.omgchrome.com/android-apps-notifications-call-alerts-chromebook/

30. Future of Chrome OS
East Unlock
http://www.omgchrome.com/android-apps-notifications-call-alerts-chromebook/

31. Simplicity
Security
Speed
Summary of Chrome OS
Stateless Linux
Nothing But Web
Discarding Tabs
Fast Boot
Zswap
Auto-Update
Verified Boot
Sandbox
Encrypted User’s Data
Read-Only Root
Same Experience Everywhere

32. Chrome OS is a totally rethought computer that lets you stop
worrying about your computer, so you can focus on the internet,
which is what most of us use our computers for nowadays,
anyways. -- Google
Questions