1.1.2 Types of Processor Flashcards

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1
Q

What are the key facts about CISC?

A

Complex Instruction Set Computing

  • Each Instruction may take multiple clock cycles
  • Instructions are different sizes (bits)
  • Complicated processor design - circuitry is expensive
  • More instructions than RISC (larger instruction set)
  • Some instructions in CISC will rarely get used
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2
Q

What are the key facts about RISC?

A

Reduced Instruction Set Computing / Computer

  • Each Instruction will take one clock cycle
  • Instructions are the same size (bits)
  • Simple processor design (Less transistors), so cheaper to produce
  • Less instructions than CISC
  • Most Instructions are used regularly (due to limited range)
  • Produces less heat and uses less power than CISC
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3
Q

What are the key facts about a GPU?

A

GPU - Graphics Processing Unit

Is a co-processor specialised in rendering graphics

Specialist instructions available

1000s of cores that can apply the same instruction to multiple pieces of data simultaneously

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4
Q

What is parallel processing?

A

Will allow multiple separate jobs to run concurrently.

Can be achieved through multiple processors or distributed across multiple cores in a single CPU or GPU.

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5
Q

What is a multicore system?

A

More than one processing unit in a single processor

Each core can independently process instructions at the same time.

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6
Q

What are some limitations of parallel processing?

A

Writing algorithms for parallel processing is more challenging.

Some tasks cannot be done in parallel due to relying on each others output

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