COMPUTER SYSTEMS An Integrated Approach to Architecture and Operating Systems Chapter 1 Introduction ©Copyright 2008 Umakishore Ramachandran and William.

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COMPUTER SYSTEMS An Integrated Approach to Architecture and Operating Systems Chapter 1 Introduction ©Copyright 2008 Umakishore Ramachandran and William D. Leahy Jr.

What’s Inside the Box?

Levels of Abstraction

Hardware Software Interface

From Electrons & Holes to a Multiplayer Video Game

The Role of the Operating System Resource manager Provide consistent interface to resources Job scheduler

Client Application (Halo 3) Player clicks mouse cursor on target

Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application Player clicks mouse cursor on target It's a mouse interrupt!

Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application It's a mouse interrupt! CLIENT Player clicks mouse cursor on target

Client Application creates message to send to server application Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application It's a mouse interrupt! CLIENT Player clicks mouse cursor on target

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application It's a mouse interrupt! CLIENT Player clicks mouse cursor on target

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application OS: Receives Message sends to server application It's a mouse interrupt! Got a message! CLIENT Player clicks mouse cursor on target SERVER

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application OS: Receives Message sends to server application Application examines message and state of game and determines Master Chief dies! Sends message back to client. It's a mouse interrupt! Got a message! CLIENT Player clicks mouse cursor on target SERVER

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application OS: Receives Message sends to server application Application examines message and state of game and determines Master Chief dies! Sends message back to client. OS: Sends Message to client It's a mouse interrupt! Got a message! CLIENT Player clicks mouse cursor on target SERVER

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application OS: Receives Message sends to server application Application examines message and state of game and determines Master Chief dies! Sends message back to client. OS: Sends Message to client It's a mouse interrupt! Got a message! CLIENT Player clicks mouse cursor on target SERVER OS: Receives message and sends it to application

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application OS: Receives Message sends to server application Application examines message and state of game and determines Master Chief dies! Sends message back to client. OS: Sends Message to client It's a mouse interrupt! Got a message! CLIENT Player clicks mouse cursor on target SERVER OS: Receives message and sends it to application ClientApplication generates required images, etc. Sends I/O requests to OS

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application OS: Receives Message sends to server application Application examines message and state of game and determines Master Chief dies! Sends message back to client. OS: Sends Message to client OS changes I/O devices to show Master Chief blowing up!!! It's a mouse interrupt! Got a message! CLIENT ut oh! Player clicks mouse cursor on target SERVER OS: Receives message and sends it to application ClientApplication generates required images, etc. Sends I/O requests to OS

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application OS: Receives Message sends to server application Application examines message and state of game and determines Master Chief dies! Sends message back to client. OS: Sends Message to client OS changes I/O devices to show Master Chief blowing up!!! It's a mouse interrupt! Got a message! CLIENT ut oh! Player clicks mouse cursor on target SERVER BAM!!! OS: Receives message and sends it to application ClientApplication generates required images, etc. Sends I/O requests to OS

Client Application creates message to send to server application OS: Sends Message to server Client Application (Halo 3) OS: Recognizes interrupt Sends it to client application OS: Receives Message sends to server application Application examines message and state of game and determines Master Chief dies! Sends message back to client. OS: Sends Message to client OS changes I/O devices to show Master Chief blowing up!!! It's a mouse interrupt! Got a message! CLIENT ut oh! Player clicks mouse cursor on target SERVER BAM!!! OS: Receives message and sends it to application ClientApplication generates required images, etc. Sends I/O requests to OS

What’s Happening Inside the Box? Processor Memory I/O Parallelism Networking

Layers of Abstraction Application (Algorithms expressed in High Level Language)System software (Compiler, OS, etc.)Computer ArchitectureMachine Organization (Datapath and Control)Sequential and Combinational Logic ElementsLogic GatesTransistors Solid-State Physics (Electrons and Holes)

Where Does This Course Fit? Advanced Topics in Operating Systems Advanced Topics in Computer Architecture Advanced Topics in Computer Networks Integrated Approach to Computer Architecture and Operating Systems Fundamentals of Digital Electronic & Logic Design Fundamentals of Programming

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