multi-core processor and parallel programming

8/9/2019 Multi-Core Processor and Parallel Programming

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Presented By:

Kumar GauravDeepak Kumar

MultiMulti--CoreCoreProcessor and ParallelProcessor and Parallel

ProgrammingProgramming


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AgendaAgenda

Introduction

History

Hardware Model

Software Model

Programming Principle

Programming Platform Simulation


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INTRODUCTION


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What is MultiWhat is Multi--Core ProcessorCore Processor

Essentials for a Multi-Core Processor A device with more than one CPU core on a single die

Which coherently shares a common virtual memory space

An MIMD (Multiple Input Multiple Data) device

Some devices with multiple core but are not

Multi-core. GPGPU MPPA


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Why MultiWhy Multi--CoreCore

Single CPU were not getting faster the way they used

to.

All the possible alternate designs have been used and

Caches grew to cover most of the die and we were still

far behind Moores Law.

If the CPU and DSPs maintained the Moores laws rate

then today we would have CPUs or DSPs of 15Ghz

Fortunately Moores laws Continued capacity growth

had made single-chip parallel computing possible.

Multi-Core has become the most common form of

Parallel Computing.

Performance increases have dropped sharply by 20%

per yr.


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ContinueContinue

Parallel Computing could follow the Moores

law.

Parallel Computers are programmed in software

and not in hardware


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HISTORY


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Production.Production.

Burrough D825

1 to 4 CPUs /1 to 16 memories

http://ed.thelen.org/comp-hist/BRL64-b.html

IBM 3084 Mainframe

4 systems / 370CPUs

http://www.03.IBM.com/history/exhibits/mainframe/mainframe_PP3084.html

Sun 360MP

Up to 4 SPARC CPUs

http://en.wikipedia.org/wiki/sun_microsystems


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Todays MultiTodays Multi--CoresCores

Multi-core processors are today available forgeneral purpose or use in Embedded application

x86 multi-cores, such as Intels core 2 duo are

aimed for both general as well as embedded

purposes.

Arm Cortex A-9 MPCore, are specialized forembedded use.


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Hardware & Software Model


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How To build Parallel ComputersHow To build Parallel Computers

Parallel or Serial Instruction Streams

Parallel or Serials Data Streams

Shared or Distributed memory

Homogenous or Heterogeneous CPU.


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Continue..Continue..

Multi-cores

Parallel

Instruction

Streams

Shared

Memory

Homoge

-neousCPU

Parallel

Data

Streams


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ContinueContinue


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Building Memory for ParallelBuilding Memory for Parallel

ComputersComputers

Distributed MemoryEach CPUs have its Own local Memory

CPUs Communicate by sending message

Shared Memory

All CPUs Share a Common Memory

CPUs communicate through Several variables in

Memory


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Building CPU for ParallelBuilding CPU for Parallel

ComputersComputers

Homogeneous CPUs

All CPUs are sameAny code can run on any CPU

Heterogeneous CPU

Mixed Different Types of processors each optimized

for different applications

GP CPU-Codes

DSP- signal processing

FPU-Arithmetic Throughput

GPU- Graphics


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multi-core processor and parallel programming

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