Question

Consider a pipeline which takes 7 cycles to executes $1^{st}$ instruction. the same task can be completed in a non - pipelined system with x cycles. For 994 instruction the speed up of pipeline is 4.97 as compared to the non-pipeline system. The value of x is __________.

Answer 1

option (c)

Number of cycles needed to complete $1^{st}$ instruction in pipeline

= number of segments (k)

= 7

k = 7

pipeline time = k + n - 1 = 7 + 994 - 1 = 1000

non-pipeline time = 994 * x

$\text{Speed up}=\frac{994x}{1000}$

$4.97=\frac{994x}{1000}$

x = 5