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Cs 152 L1 Intro.1 Patterson Fall 97 ©UCB ECE 366 Computer Architecture Lecture 1-2 Shantanu Dutt (http://www.ece.uic.edu/~dutt) Adapted from (with adds.

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Presentation on theme: "Cs 152 L1 Intro.1 Patterson Fall 97 ©UCB ECE 366 Computer Architecture Lecture 1-2 Shantanu Dutt (http://www.ece.uic.edu/~dutt) Adapted from (with adds."— Presentation transcript:

1 cs 152 L1 Intro.1 Patterson Fall 97 ©UCB ECE 366 Computer Architecture Lecture 1-2 Shantanu Dutt (http://www.ece.uic.edu/~dutt) Adapted from (with adds and deletes): CS152 Computer Architecture and Engineering Lecture 1 August 27, 1997 Dave Patterson (http.cs.berkeley.edu/~patterson) lecture slides: http://www-inst.eecs.berkeley.edu/~cs152/

2 cs 152 L1 Intro.2 Patterson Fall 97 ©UCB Overview °Intro to Computer Architecture °Administrative Matters °Course Style, Philosophy and Structure °Organization and Anatomy of a Computer

3 cs 152 L1 Intro.3 Patterson Fall 97 ©UCB What is “Computer Architecture” Computer Architecture = Instruction Set Architecture + Machine Organization

4 cs 152 L1 Intro.4 Patterson Fall 97 ©UCB Instruction Set Architecture (subset of Computer Arch.)... the attributes of a [computing] system as seen by the programmer, i.e. the conceptual structure and functional behavior, as distinct from the organization of the data flows and controls the logic design, and the physical implementation. – Amdahl, Blaaw, and Brooks, 1964SOFTWARE -- Organization of Programmable Storage -- Data Types & Data Structures: Encodings & Representations -- Instruction Set -- Instruction Formats -- Modes of Addressing and Accessing Data Items and Instructions -- Exceptional Conditions

5 cs 152 L1 Intro.5 Patterson Fall 97 ©UCB The Instruction Set: a Critical Interface instruction set software hardware

6 cs 152 L1 Intro.6 Patterson Fall 97 ©UCB Example ISAs (Instruction Set Architectures) °Digital Alpha(v1, v3)1992-97 °HP PA-RISC(v1.1, v2.0)1986-96 °Sun Sparc(v8, v9)1987-95 °SGI MIPS(MIPS I, II, III, IV, V)1986-96 °Intel(8086,80286,80386,1978-96 80486,Pentium, MMX,...)

7 cs 152 L1 Intro.7 Patterson Fall 97 ©UCB MIPS R3000 Instruction Set Architecture (Summary) °Instruction Categories Load/Store Computational Jump and Branch Floating Point -coprocessor Memory Management Special R0 - R31 PC HI LO OP rs rt rdsafunct rs rt immediate jump target 3 Instruction Formats: all 32 bits wide Registers Q: How many already familiar with MIPS ISA?

8 cs 152 L1 Intro.8 Patterson Fall 97 ©UCB Organization Logic Designer's View ISA Level FUs & Interconnect °Capabilities & Performance Characteristics of Principal Functional Units (FUs) (e.g., Registers, ALU, Shifters, Logic Units,...) ° Advanced design and analysis of FUs for opt. (speed, power) °Ways in which these components are interconnected °Information flows between components °Logic and means by which such information flow is controlled. °Choreography of FUs to realize the ISA °Register Transfer Level (RTL) Description

9 cs 152 L1 Intro.9 Patterson Fall 97 ©UCB Example Organization °TI SuperSPARC tm TMS390Z50 in Sun SPARCstation20 Floating-point Unit Integer Unit Inst Cache Ref MMU Data Cache Store Buffer Bus Interface SuperSPARC L2 $ CC MBus Module MBus L64852 MBus control M-S Adapter SBus DRAM Controller SBus DMA SCSI Ethernet STDIO serial kbd mouse audio RTC Boot PROM Floppy SBus Cards

10 cs 152 L1 Intro.10 Patterson Fall 97 ©UCB What is “Computer Architecture”? I/O systemInstr. Set Proc. Compiler Operating System Application Digital Design Circuit Design Instruction Set Architecture Firmware °Coordination of many levels of abstraction (mainly within the oval; NOTE: Arithmetic ckts fall into both architecture and digital design). °Under a rapidly changing set of forces °Design, Measurement, and Evaluation Datapath & Control Layout

11 cs 152 L1 Intro.11 Patterson Fall 97 ©UCB Forces on Computer Architecture Computer Architecture Technology Programming Languages Operating Systems History Applications

12 cs 152 L1 Intro.12 Patterson Fall 97 ©UCB Technology °In ~1985 the single-chip processor (32-bit) and the single-board computer emerged => workstations, personal computers, multiprocessors have been riding this wave since °In the 2002+ timeframe, these may well look like mainframes compared single-chip computer (maybe 2 chips) DRAM YearSize 198064 Kb 1983256 Kb 19861 Mb 19894 Mb 199216 Mb 199664 Mb 1999256 Mb 20021 Gb Microprocessor Logic DensityDRAM chip capacity

13 cs 152 L1 Intro.13 Patterson Fall 97 ©UCB Technology => dramatic change °Processor logic capacity: about 30% per year clock rate: about 20% per year So… advanced functions (e.g., multimedia functions in some Pentiums) and high-speed features (multiple pipelines, larger caches) °Memory DRAM capacity: about 60% per year (4x every 3 years) Memory speed: about 10% per year Cost per bit: improves about 25% per year So… larger memory => more challenging applications (e.g., atmospheric modeling, astrophysics modeling) °Disk capacity: about 60% per year So … huge disk capacities => large data storage (video, music files, large data for various applications)

14 cs 152 L1 Intro.14 Patterson Fall 97 ©UCB Performance Trends Microprocessors Minicomputers Mainframes Supercomputers 1995 Year 19901970197519801985 Log of Performance

15 cs 152 L1 Intro.15 Patterson Fall 97 ©UCB Processor Performance (SPEC) RISC introduction Did RISC win the technology battle and lose the market war? performance now improves ­ 50% per year (2x every 1.5 years)

16 cs 152 L1 Intro.16 Patterson Fall 97 ©UCB Applications and Languages °CAD, CAM, CAE,... °Lotus, DOS,... °Multimedia,... °The Web,... °JAVA,... °Large Scientific Computations °???

17 cs 152 L1 Intro.17 Patterson Fall 97 ©UCB Measurement and Evaluation Architecture is an iterative process -- searching the space of possible designs -- at all levels of computer systems Good Ideas Mediocre Ideas Bad Ideas Cost / Performance Analysis Design Analysis Creativity

18 cs 152 L1 Intro.18 Patterson Fall 97 ©UCB Why do Computer Architecture? °CHANGE °It’s exciting! °It has never been more exciting! °It impacts every other aspect of electrical engineering and computer science

19 cs 152 L1 Intro.19 Patterson Fall 97 ©UCB ECE 366: Course Content Computer Architecture -Instruction Set -Computer Organization -Hardware Components (Basic & Adv.) -Hierarchy of Components -Interfaces bet. Components -Data and Control Flow -Logic Designer’s View (FSM, Arithmetic Ckts, Impl.) ­ “Building Architect” & “Construction Engineer”

20 cs 152 L1 Intro.20 Patterson Fall 97 ©UCB CE 366: So what's in it for me? °In-depth understanding of the inner-workings of modern computers, their evolution, and trade-offs present at the hardware/software boundary. Insight into fast/slow operations that are easy/hard to implementation hardware °Experience with the design process in the context of a large complex (hardware) design. Functional Spec --> Control & Datapath --> Physical implementation

21 cs 152 L1 Intro.21 Patterson Fall 97 ©UCB My Goal °Show you how to understand modern computer architecture in its rapidly changing form. °Show you how to design by leading you through the process on challenging design problems °Show you how and why (rationale) of designs--v. important °Hopefully, be able to guide you to think about and analyze designs and alternatives °so... ask questions come to office hours go back and fully understand past lectures be prepared for the next lecture...

22 cs 152 L1 Intro.22 Patterson Fall 97 ©UCB Grading °Grade breakdown Final Exam: 40% Midterm Exam20% CU Design Projects:20% Homework Assignments20% °No late homeworks or projects: °Grade deterination around average grade will be a B at least half to one-third std-devn above average will be A set expectations accordingly

23 cs 152 L1 Intro.23 Patterson Fall 97 ©UCB Course Problems °Can’t make midterm only for before-the-fact demonstrable emergency °Forgot to turn in homework/ Dog ate computer need to be fair to the other students; no late hws °What is cheating? Studying together in groups is encouraged Work must be your own Common examples of cheating: running out of time on a assignment and then pick up output, take homework from box and copy, person asks to borrow solution “just to take a look”, copying an exam question,... Better off to do the assignment for your own understanding Cheating on assignment, projects will be seriously detrimental to your understanding of material and thus on your midterm & final exam performance Plus penalties Do not do it; it is unethical, dishonest and not good for anyone, the perpetrator in particular

24 cs 152 L1 Intro.24 Patterson Fall 97 ©UCB Class decides on penalties for cheating; staff enforces °HWs: 0 for problem 0 for homework assignment subtract full value for assignment subtract 2X full value for assignment °Projects (groups: only penalize individuals?) 0 for problem 0 for homework assignment subtract full value for assignment subtract 2X full value for assignment °Exams 0 for problem 0 for exam

25 cs 152 L1 Intro.25 Patterson Fall 97 ©UCB Things We Hope You Will Learn fromProjects °Keep it simple and make it work Fully test everything individually and then together Retest everything whenever you make any changes Last minute changes are big “no nos” °Group dynamics. Communication is the key to success: Be open with others of your expectations and your problems Everybody should be there on design meetings when key decisions are made and jobs are assigned °Planning is very important: Promise what you can deliver; deliver more you promise Murphy’s Law: things DO break at the last minute -Don’t make your plan based on the best case scenarios -Freeze you design and don’t make last minute changes °Never give up! It is not over until you give up.

26 cs 152 L1 Intro.26 Patterson Fall 97 ©UCB What you should know from prereqs (see syllabus) °Read and write basic C programs °Read and write in an assembly language °Logic design logical equations, schematic diagrams, FSMs, components

27 cs 152 L1 Intro.27 Patterson Fall 97 ©UCB Levels of Representation High Level Language Program Assembly Language Program Machine Language Program Control Signal Specification Compiler Assembler Machine Interpretation 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) 0000 1001 1100 0110 1010 1111 0101 1000 1010 1111 0101 1000 0000 1001 1100 0110 1100 0110 1010 1111 0101 1000 0000 1001 0101 1000 0000 1001 1100 0110 1010 1111 °°°° ALUOP[0:3] <= InstReg[9:11] & MASK

28 cs 152 L1 Intro.28 Patterson Fall 97 ©UCB Levels of Organization SPARCstation 20 Processor Computer Control Datapath MemoryDevices Input Output Workstation Design Target: 25% of cost on Processor 25% of cost on Memory (minimum memory size) Rest on I/O devices, power supplies, box

29 cs 152 L1 Intro.29 Patterson Fall 97 ©UCB Execution Cycle Instruction Fetch Instruction Decode Operand Fetch Execute Result Store Next Instruction Obtain instruction from program storage Determine required actions and instruction size Locate and obtain operand data Compute result value or status Deposit results in storage for later use Determine successor instruction; can generally be combined w/ Decode

30 cs 152 L1 Intro.30 Patterson Fall 97 ©UCB The SPARCstation 20 Memory Controller SIMM Bus Memory SIMMs Slot 1MBu s Slot 0MBu s MSBI Slot 1SBusSlot 0SBusSlot 3SBusSlot 2SBus MBus SECMACIO Disk Tape SCSI Bus SBus Keyboard & Mouse Floppy Disk External Bus SPARCstation 20

31 cs 152 L1 Intro.31 Patterson Fall 97 ©UCB The Underlying Interconnect SPARCstation 20 Memory Controller SIMM Bus MSBI Processor/Mem Bus: MBus SECMACIO Standard I/O Bus: Sun’s High Speed I/O Bus: SBus Low Speed I/O Bus: External Bus SCSI Bus

32 cs 152 L1 Intro.32 Patterson Fall 97 ©UCB Processor and Caches SPARCstation 20 Slot 1MBu s Slot 0MBu s MBus Module External Cache DatapathRegisters Internal Cache Control Processor

33 cs 152 L1 Intro.33 Patterson Fall 97 ©UCB Memory SPARCstation 20 Memory Controller Memory SIMM Bus SIMM Slot 0SIMM Slot 1SIMM Slot 2SIMM Slot 3SIMM Slot 4SIMM Slot 5SIMM Slot 6SIMM Slot 7 DRAM SIMM DRAM

34 cs 152 L1 Intro.34 Patterson Fall 97 ©UCB Input and Output (I/O) Devices SPARCstation 20 Slot 1SBusSlot 0SBusSlot 3SBusSlot 2SBus SECMACIO Disk Tape SCSI Bus SBus Keyboard & Mouse Floppy Disk External Bus °SCSI Bus: Standard I/O Devices °SBus: High Speed I/O Devices °External Bus: Low Speed I/O Device

35 cs 152 L1 Intro.35 Patterson Fall 97 ©UCB Standard I/O Devices SPARCstation 20 Disk Tape SCSI Bus °SCSI = Small Computer Systems Interface °A standard interface (IBM, Apple, HP, Sun... etc.) °Computers and I/O devices communicate with each other °The hard disk is one I/O device resides on the SCSI Bus

36 cs 152 L1 Intro.36 Patterson Fall 97 ©UCB High Speed I/O Devices SPARCstation 20 Slot 1SBusSlot 0SBusSlot 3SBusSlot 2SBus °SBus is SUN’s own high speed I/O bus °SS20 has four SBus slots where we can plug in I/O devices °Example: graphics accelerator, video adaptor,... etc. °High speed and low speed are relative terms

37 cs 152 L1 Intro.37 Patterson Fall 97 ©UCB Slow Speed I/O Devices SPARCstation 20 Keyboard & Mouse Floppy Disk External Bus °The are only four SBus slots in SS20--”seats” are expensive °The speed of some I/O devices is limited by human reaction time--very very slow by computer standard °Examples: Keyboard and mouse °No reason to use up one of the expensive SBus slot

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