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(Based on text: David A. Patterson & John L. Hennessy, Computer Organization and Design: The Hardware/Software Interface, 3rd Ed., Morgan Kaufmann, 2007)
IntroductioIntroductionn
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COURSE CONTENTSCOURSE CONTENTS IntroductionIntroduction Instructions Computer Arithmetic Performance Processor: Datapath Processor: Control Pipelining Techniques Memory Input/Output Devices
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INTRODUCTIONINTRODUCTION
Overview the Computer Systems Evolution of Memory and Processor Historical Perspective Levels of Representation
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A Desktop A Desktop ComputerComputer
A desktop computer (left figure) Motherboard, I/O interface board, board for memory chips, power
supply, disk drives (right figure)
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Inside a PCInside a PC
Patterson & Henessey, Morgan Kaufmann 2007
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PC PC MotherboardMotherboard
Intel Pentium 4 processor - upper left, covered by metal fins (heat sink) Main memory DRAM – middle, small board perpendicular to mother board (DIMMs) The rest – mostly connectors for external I/O devices
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Processor Chip - Processor Chip - 11
Earlier Intel Pentium Chip
Data
cache
Instruction
cache
Bus
Integer
data-
path
Floating-
point
data-path
BranchControl
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Processor Chip - Processor Chip - 22
Intel Pentium 4Intel Pentium 4 – die photo (Henessey & Patterson, Morgan Kaufmann 2003)
Intel Pentium 4 with 3 GHz - package (intel 2003)
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Processor Chip - Processor Chip - 33
Intel Pentium 4
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Hardware / Hardware / SoftwareSoftware
Hardware: physical components
System software: operating system, compiler, ....
Application software: PowerPoint, spreadsheet, ...
System software
Application software
Hardware
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Five Classic Components Five Classic Components of of a Computer + Networka Computer + Network
Datapath:Datapath: performs arithmetic & logic operation
Control:Control: tells datapath, memory, I/O what to do according to instructions
Memory:Memory: stores programs + datacache (SRAM): small & fastDRAM: main memoryoptical disk (CD, DVD), magnetic disk, FLASH, magnetic tapes: secondary, nonvolatile
Input:Input: inputs instructions, data, etc.; e.g. keyboard, mouse (electromech optical), disk...
Output:Output: outputs results, information, etc.; e.g. monitor (flat-panel LCDs or CRT), printer, disk, …
Network:Network: communicates with other computers, resource sharing, non-local accesses; e.g. LAN, Internet, ...
Input Output
Datapath
Memory
Control
CPU
Network
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A Historical A Historical PerspectivePerspective
1946: J. Presper Eckert & John Mauchly (U. Penn.) announced ENIAC (Electronic Numerical Integrator and Calculator). It used vacuum tubes and performed 1900 adds/sec
John von Neumann joined Eckert & Mauchly and built EDVAC (Electronic Discrete Variable Automatic Computer), a stored-program computer
1948: U. Manchester built Mark-I, first operational, stored-program computer
1949: Maurice Wilkes (Camb. U.) built EDSAC (Electronic Delay Storage Automatic Calculator), first full-scale, operational, stored-program computer
1940s: Other pioneers include Konrad Zuse (Germany), Alan Turing (UK) 1940s: Howard Aiken (Harvard) built Mark-III & Mark-IV, with separate
memories for instructions & data, hence Harvard Architecture 1947: Whirlwind started at MIT, using magnetic core memory 1951: 1st successful commercial computer, UNIVAC I (Universal
Automatic Computer), built and sold (Remington-Rand / Eckert-Mauchly Computer Corp.)
1952: IBM shipped IBM 701
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A Historical A Historical PerspectivePerspective
1964: IBM Syst/360. IBM/360 architectures dominated large computer market
1965: DEC unveiled PDP-8, 1st commercial minicomputer 1971: Intel invented 1st microprocessor, Intel 4004 1963: Seymour Cray at CDC announced CDC 6600, 1st supercomputer 1976: Cray announced Cray-I, then fastest supercomputer No single fountainhead for personal computer 1977: Apple II by Steve Jobs & Steve Wozniak set stds for low cost high
volume 1981: IBM announced IBM PC and became the best-selling computer of
any kind; its success gave Intel the most popular microprocessor and Microsoft the most popular operating system
1990s: Multimedia, networks, Internet, embedded processors, graphics, etc.
2000 - : Wireless & mobile (e.g. cell phone), 3-D graphics, multimedia (e.g. video), Internet, GHz processors, embedded, dual-core, quad-core, multi-core, etc.
90s, 2000 - : Architectural techniques: Superscalar, dynamic pipelining, speculative execution, VLIW, multithreading, multi-core arch, etc.
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Intel 80x86 Intel 80x86 HistoryHistory
1978: Intel announced 8086 16-bit architecture (an extension to 8080 8-bit)
1980: Intel announced 8087 floating point co-processor 1982: Intel announced 80286, with address-space extended to 24 bits 1985: Intel announced 80386, a 32-bit architecture 1989: Intel 80486, with improved performance, pipelining 1992: Intel Pentium, improved performance 1995: Intel Pentium Pro, improved performance (> 100 MHz) 1997: MMX extension, set of instructions to accelerate multimedia &
communication applications 1998: Intel Pentium II 1999: Intel Pentium III 2000: Intel Pentium III > 1 GHz, competition from AMD, Pentium IV
(11/00) 2002: Intel Pentium IV > 3 GHz (3.06 GHz) with multithreading and 0.13
micron technology 2005: Intel Pentium D (dual-core version of Pentium 4 Extreme) - 2
independent execution units onto same processor 2006-07: Intel Quad-Core, 65 nm technology
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TechnologTechnology Trends - y Trends - 11
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Technology Trends Technology Trends - 2- 2
Moore’s law: transistor capacity doubles every 18-24 months
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Multithreading & Multi-core Multithreading & Multi-core CPUsCPUs
Threads (threads of execution) - a program forks itself into 2 or more simultaneously (or pseudo-simultaneously) running tasks
Multiple threads can be executed in parallel on many computers:
Single processor - by time slicing when a single processor switches between different threads, so fast as to give the illusion of simultaneity
Multiprocessor or multi-core system - achieved via multiprocessing, different threads & processes run simultaneously on different processors or cores.
Multi-core CPUs: Multi-chip approach - cores are made by different chips that are put
together in a single package. Cores communicate using front side bus. L2 cache is separated
Monolithic approach - Cores are manufactured in only one chip, do not need to use front side bus. Memory cache is shared between the two cores. Better performance
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Levels of Levels of RepresentationRepresentation
temp = v[k];v[k] = v[k+1];v[k+1] = temp;
lw $15, 0($2)lw $16, 4($2)sw $16, 0($2)sw $15, 4($2)
00000000101000010000000000011000
High level language program
Compiler
Assembly language program
Assembler
Object: Machine language modu.
Object: Library routine (machine lang.)Linker
Executable: Machine language prog.
Loader Memory
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SUMMARYSUMMARY
Overview the computer systems Five classic components of a
computer Evolution of memory and
processor Computer technology trends Levels of representation