Question

A 5-stage pipeline processor executes 100 instruction and takes 144 cycles for execution because of some hazards in pipeline. A new solution is implemented to reduce the hazard's impact by 60%. How many extra cycles the new pipeline takes as compared to the pipeline execution without hazards?

Answer 1

option (a)

$\text{Pipeline cycles without hazards}=(k+n-1)\text{k = number of stages}\text{n = number of instructions}=5+100-1=104\text{Pipeline cycles with hazard = 144 (given)}\text{Extra cycles because of hazard}=144-104=40\text{Extra cycles in new pipeline}=40\ast 40\%=16$