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Python Parallel Programming Cookbook by Giancarlo Zaccone

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The parallel computing memory architecture

Based on the number of instructions and data that can be processed simultaneously, computer systems are classified into four categories:

  • Single instruction, single data (SISD)
  • Single instruction, multiple data (SIMD)
  • Multiple instruction, single data (MISD)
  • Multiple instruction, multiple data (MIMD)

This classification is known as Flynn's taxonomy.

The parallel computing memory architecture

SISD

The SISD computing system is a uniprocessor machine. It executes a single instruction that operates on a single data stream. In SISD, machine instructions are processed sequentially.

In a clock cycle, the CPU executes the following operations:

  • Fetch: The CPU fetches ...

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