No of clock cycles

Question

Consider the following sequence of instructions executed on the five-stage pipelined processor:

Assuming there is no forwarding, calculate the number of clock cycles needed to execute above program ?

Comments

But ideally it should be 17

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yes .

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Ya exactly in gate everything will be mentioned clearly..

Answer 1

There may be 2 scenarios to this which is discussed below :

So in 1st case , no of cycle required = 17

    in 2nd case , no of cycle required  = 14

Specifically 2nd case deals with RISC pipeline..

And 1st case deals with an arbitrary 5 stage pipelined processor..

So according to the question , it is case 1..

Hence the correct answer should be 17 cycles..

Comments

Ya it is fine..

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What does $lw\; \$1, 40(\$6)$ mean?

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"you can fetch the Instruction in the sequence .. later you can execute rest of the stage. rather than fetching the sequence in the last