SLR1-1.1- Pipe-lining

Question 1

What type of technique is pipe-lining?

Answer 1

Pipelining is a technique which can be used by a processor to improve performance

Question 2

What is pipe-lining?

Answer 2

• The concurrent processing of multiple instructions.
• One instruction is fetched whilst the previous is decoded and the previous one to that is executed.
• If branching, the whole pipeline has to be flushed.
  This increases the speed of execution.

Question 3

Why is it efficient to use pipe-lining?

Answer 3

• Can make use of the various registers in the CPU
• It allows different parts of instructions across multiple stages to be held in different registers at the same time

Question 4

What two types of pipe-line is processor pipe-lining split into?

Answer 4

1) Instruction pipeline
2) Arithmetic pipeline

Question 5

What is is Instruction pipeline?

Answer 5

It consists of stages in which an instruction must move through the processor

Question 6

What is Arithmetic pipeline?

Answer 6

It consists of the parts of an arithmetic operation that can be broken down and overlapped as they are carried out

Question 7

Why is pipelining very common in processors nowadays?

Answer 7

It allows multiple instructions to be executed at the same time

Question 8

What is a limitation of pipelining?

Answer 8

A program with lots of branch instructions may not benefit much from the effects of pipelining