Q49,paper3,D 12. Let f be the fraction of a computation (in terms of time) that is parallelizable, P the number of processors in the system, and sp the speed up achievable in comparison with sequential execution – then the sp can be calculated using the relation :

((        (A)1/(1 – f – f/P)

(B) P/(P – f(P + 1))

(C) 1/(1 – f + f/P)

(D) P/(P + f(P – 1))

Answer c

Explanation.

 Definition of Amadhl law.