A program executes 15 billion instructions. You are running this program in two systems: System A: has a processor with 3 GHz and an average CPI of 2.0 System B: has an average CPI 1.2 and execution time is 1.5 X more than system A. What is the clock speed of processor in system B.

Clock speed of B = 7.5 GHz

Given:

Processor speed of A = 3 GHz

Average CPI of A = 2

Average CPI of B = 1.2

Execution time of B is 1.5 times then A

Find:

Clock speed of B

Computation:

Execution time = CPI × Processor speed × Instructions

Execution time of B = 1.5[Execution time of A]

1.2 × Clock speed of B[15 billion] = 1.5[2 × 3][15 billion]

Clock speed of B = 7.5 GHz

this seems to be in the wrong category. but i'll take some free points my dude

posting this in wrong category will result in people seeing it who won't know the answer.