computer organization and computer architecture...
TRANSCRIPT
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NAS 2011 July 28-30, 2011
Computer Organization and
Computer Architecture Education
Safwat Zaky
Edward S. Rogers Sr. Department of Electrical and
Computer Engineering
University of Toronto
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NAS 2011 July 28-30, 2011
A long and Fascinating Journey
1946: INIAC
30 tons
18,000 vacuum
tubes
5000 additions per
second
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Today, MacBook Air
1.06 kg
Dual core, 2GB
memory, 250 GB
flash disc
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NAS 2011 July 28-30, 2011
The Travelling Salesman Problem
1954: Solved for the optimum route to visit 49
locations
1987: 532 locations
1998: 13,509 locations
2006: 85,900 locations
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NAS 2011 July 28-30, 2011
Continuous Innovation
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Computerarchitecture
Hardware
TechnologySoftware
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NAS 2011 July 28-30, 2011
Is a course on computer
architecture needed?
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NAS 2011 July 28-30, 2011
CcomC
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Operating system,
Compiler
Applications
Microelectronics
Digital design
Computer organization and architecture
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NAS 2011 July 28-30, 2011
Bob Colwell (Intel’s chief architect on the
Pentium project) is quoted to have said
“I can tell you with certainty that I did not really
know how computers worked until I had to write
in assembly … Only then did it truly dawn on me
… what a compiler is targeting”
A. Clements, ASEE/IEEE Frontiers in Education Conf., 2008
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NAS 2011 July 28-30, 2011
“Computer architecture is a key component of
computer engineering … It is difficult to design
an operating system well without knowledge of
the underlying architecture. Moreover, the
computer designer must have an understanding
of software in order to implement the optimum
architecture.”
IEEE CE Curriculum Report, 2004
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NAS 2011 July 28-30, 2011
Introduction to System Integration
A course on computer organization/architecture
provides an excellent introduction to system
integration and the issues involved
It is usually the first course to do so
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NAS 2011 July 28-30, 2011
Students learn about interactions & trade-offs
Hardware Software
Parallel Serial
Cache size Miss rate Access time
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NAS 2011 July 28-30, 2011
Course Content
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NAS 2011 July 28-30, 2011
Basic content
Digital systems
Data representation
ISA
Processor and memory organization
I/O subsystem
Computer arithmetic
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NAS 2011 July 28-30, 2011
Adequate detail
While preparing the first edition of Computer
Organization (1978) we wrote:
“Block diagrams are indispensable … However,
it is important that they be supplemented with
adequate details to encourage the student to dig
underneath the surface.”
Zaky, Hamacher and Vranesic, IEEE Trans. On Education, Feb. 1977.
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NAS 2011 July 28-30, 2011
Integration and Breadth of Coverage
An integrated view of hardware and software
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Operating system,
Compiler, Networks
Digital design
Computer organization and architecture
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NAS 2011 July 28-30, 2011
Organization of a RAM chip
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NAS 2011 July 28-30, 2011
An output interface
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NAS 2011 July 28-30, 2011
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Detail
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NAS 2011 July 28-30, 2011
Generation of an
object program
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NAS 2011 July 28-30, 2011
Processor scheduling
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NAS 2011 July 28-30, 2011
IEEE/ACM Curricula
ACM 1968 CS
IEEE/ACM 1991 CS
2001 CS
2004 CE
2008 CS (Update)
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NAS 2011 July 28-30, 2011
CC1991 - Architecture
Digital logic
Digital systems
Machine-level representation of data
Assembly-level machine organization
Memory system organization and architecture
Interfacing and communication
Alternative architectures
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NAS 2011 July 28-30, 2011
CC2001
Much increased emphasis on performance
Branch prediction, multithreading, superscaler
Architecture for networks and distributed
systems
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NAS 2011 July 28-30, 2011
CC2008 Update
Multiprocessing, Instruction level parallelism:
Superscaler, VLIW, EPIC
run-time vs. compile time
SIMD, MIMD, multithreading, multicore, GPU
Expanded content for the I/O section, modern
buses (USB, PCIe)
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NAS 2011 July 28-30, 2011
CC2008 -- Elective
A new elective section: Devices
Transducers
Multimedia encoding and decoding
More on application domains:
Mobile applications
Ubiquitous computing
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NAS 2011 July 28-30, 2011
CCCE 2004 Architecture and Organization
Same basic content
More emphasis of interfacing and processor
design
Needs updating
Embedded systems
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NAS 2011 July 28-30, 2011
Recent Books: Patt& Patel
LC-2, later LC-3, processor has a simplified ISA,
16 instructions, 5 addressing modes
Highly suitable for a broad introduction in a
Freshman course, covering logic, programming
and processor architecture
Y. Patt and S.J. Patel, “Introduction to Computing Systems: from bits & gates to C and Beyond,” McGraw-Hill, 2004
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NAS 2011 July 28-30, 2011
Hamacher et al.
… (basic material)
System software
I/O subsystem (USB, PCIe, …)
Embedded systems
System-on-a-chip – a case study
Parallel processing and performance
Hamacher, Vranesic, Zaky &Manjikian, Computer Organization and Embedded Systems, 6th edition, 2011
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NAS 2011 July 28-30, 2011
ISA’s of commercial computers
Appendices
Logic circuits
The AlteraNios II processor
The ColdFire processor
The ARM processor
The Intel IA-32 architecture
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NAS 2011 July 28-30, 2011
Ramachandran& Leahy
A course at Georgia Tech takes a very broad
approach, integrating significant material on
architecture, operating systems and networks
Ramachandran and Leahy, WCAE – 2007
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NAS 2011 July 28-30, 2011
… (basic material)
Operating systems
Memory management
File systems
Networks and protocols
Ramachandran and Leahy, “Computer Systems, An Integrated Approach to Architecture and Operating Systems,” Addison Wesley, 2011
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NAS 2011 July 28-30, 2011
Motivating Students
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NAS 2011 July 28-30, 2011
The computer architecture course has been
described as “boring” for students
Part of the challenge is that the computer is
becoming increasingly invisible
Students are looking for:
Relevance
Value
Good learning experience
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NAS 2011 July 28-30, 2011
What do students see?
Pervasive/ubiquitous/embedded computing
Social networking
Energy concerns
Danger of fragmentation of material and creating
survey-style courses
Fundamentals must be covered in depth
But show how architecture supports applications
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NAS 2011 July 28-30, 2011
Ubiquitous Computing
1991, Mark Weiser (Xerox Park):
“The most profound technologies are those that
disappear. They weave themselves into the
fabric of everyday life …”
Tabs, pads and boards
Embedded systems
Scientific American, September 1991
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NAS 2011 July 28-30, 2011
Role of I/O
Key enabling technologies are communications
and input/output subsystems
Plug and play PCI, USB
High speed PCI express (PCIe)
Networks Protocol stack
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NAS 2011 July 28-30, 2011
Wireless -- Bluetooth
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Smart phone
Microwave oven Laptop
Printer
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NAS 2011 July 28-30, 2011
Embedded Systems
Rapidly-expanding applications
Many job opportunities
CE: may emphasize interconnections,
interfacing and FPGA implementations
CS: Use of high-level languages
Real-time software
There are many familiar examples
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NAS 2011 July 28-30, 2011
Digital camera
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NAS 2011 July 28-30, 2011
Microwave Oven
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NAS 2011 July 28-30, 2011
Optical position sensor
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NAS 2011 July 28-30, 2011
Solenoid actuator
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NAS 2011 July 28-30, 2011
Energy-efficient Computing
Students are increasingly aware of the issue
Mobile computing
Conservation
An introductory discussion would provide
interest and motivation
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NAS 2011 July 28-30, 2011
A good example for the benefits of multicore and
many-core architectures
Several examples in special section in Trans.
Comp., Dec. 2005
Choose topics that relate to the instructor’s
research
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NAS 2011 July 28-30, 2011
Learning experience
Importance of laboratory
Preferably with real hardware
Many universities developed laboratory setups,
often using FPGA’s, e.g. U. of Washington
M. Holland et al, “Harnessing FPGAs for Computer Architecture Education”, MSE’03
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NAS 2011 July 28-30, 2011
FPGA-based Setups
FPGA manufacturers (particularly Altera and
Xilinx) offer well-equipped boards, with FPGA
chips, memory, displays, switches, connectors,
etc., specifically for university laboratories
Support software and documentation, including
experiments
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NAS 2011 July 28-30, 2011
Experience at Georgia Tech
The Systems course includes 60-90 hours of
unsupervised laboratory
Student surveys at the beginning and end of
semester showed significant increase in
students enthusiasm
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NAS 2011 July 28-30, 2011
Experience at ECE, U of T
“Computer Organization” is offered in Second
Year, CE and EE
Includes a substantial laboratory component
using Altera FPGA boards
It is a key factor in attracting students to
Computer Engineering
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NAS 2011 July 28-30, 2011
Concluding Remarks
Computer architecture is a key course that
provides a reference model, linking software and
hardware
To provide motivation and spur innovation,
course should connect basic material to recent
developments and exciting applications
Today, this means emphasizing parallel
processing, I/O subsystems and embedded
computing
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NAS 2011 July 28-30, 2011
Questions/Comments
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