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The performance of a pipelined processor suffers if _______.
  • a)
    The pipeline stages have different delays.
  • b)
    Consecutive instructions are dependent on each other.
  • c)
    The pipeline stages share hardware resources,
  • d)
    All of these
Correct answer is option 'D'. Can you explain this answer?
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The performance of a pipelined processor suffers if _______.a)The pipe...
The performance of a pipelined processor depends upon delays of different stage and its hardware resources also it depends upon consecutive instructions format.
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The performance of a pipelined processor suffers if _______.a)The pipe...
Pipelined Processor Performance

A pipelined processor is a type of microprocessor that uses a pipeline to increase its processing speed. The pipeline divides the processor into several stages, each of which performs a different operation on the data. However, the performance of a pipelined processor suffers if:

1. The Pipeline Stages Have Different Delays

If the pipeline stages have different delays, it can cause the processor to slow down. This is because the processor has to wait for the slowest stage to complete before it can move on to the next stage. This delay is known as pipeline bubble or pipeline stall.

2. Consecutive Instructions are Dependent on Each Other

If two consecutive instructions are dependent on each other, it can cause a pipeline stall. This is because the processor has to wait for the first instruction to complete before it can execute the second instruction. This delay can slow down the processor.

3. The Pipeline Stages Share Hardware Resources

If the pipeline stages share hardware resources, it can cause a pipeline stall. This is because the processor has to wait for the hardware resource to become available before it can execute the next instruction. This delay can slow down the processor.

Conclusion

In conclusion, the performance of a pipelined processor suffers if the pipeline stages have different delays, consecutive instructions are dependent on each other, and the pipeline stages share hardware resources. It is important to design the pipeline carefully to avoid these issues and maximize the performance of the processor.
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Instruction execution in a processor is divided into 5 stages.Instruction Fetch(IF), Instruction Decode (ID), Operand Fetch(OF), Execute(EX), and Write Back(WB),These stages take5,4,20, 10and3nanoseconds (ns) respectively. A pipelined implementation of the processor requires buffering between each pair of consecutive stages with a delay of2 ns. Two pipelined implementations of the processor are contemplated:(i) a nave pipeline implementation (NP) with 5 stages and(ii) an efficient pipeline (EP) where the OF stage id divided into stages OF1 and OF2 with execution times of 12 ns and 8 ns respectively.The speedup (correct to two decimals places) achieved by EP over NP in executing 20 independent instructions with no hazards is ________________.Note:This questions appeared as Numerical Answer Type.

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The performance of a pipelined processor suffers if _______.a)The pipeline stages have different delays.b)Consecutive instructions are dependent on each other.c)The pipeline stages share hardware resources,d)All of theseCorrect answer is option 'D'. Can you explain this answer?
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