Essentials of Computer Organization and Architecture
Essentials of Computer Organization and Architecture
5th Edition
ISBN: 9781284123036
Author: Linda Null
Publisher: Jones & Bartlett Learning
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Chapter 9, Problem 17E
Program Plan Intro

Program-level parallelism:

The process of decentralization of a single program and executing it on multiple processors is known as program-level parallelism. It includes shorter real time.

Example: parallel computer

Single Instruction Multiple DataStream (SIMD):

  • The SIMD uses single Control Unit (CU) to fetch the instructions from the store.
  • It is used for high speed performance.
  • It executes large size of data by decentralizing them.
  • The code of the variable is executed depending on its processor id.
  • It performs same operation or task on different types of data.
  • Example: vector computers, array processor, Graphics Processing Unit (GPS)

Multiple Instruction Multiple DataStream (MIMD):

  • MIMD includes multiple processors that possess inter connection.
  • It follows parallel architecture.
  • It is used for message passing.
  • It is decentralized to two groups,
    • Shared memory
    • Distributed memory
  • It includes the examples like sequent computers, BNN butterfly and many such.

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