A program takes 15 seconds to execute There are 1010 instruc

A program takes 15 seconds to execute. There are 10^10 instructions with a CPI of 1.5. What is the clock cycle time?^

Solution

Execution time = 15 seconds

Instruction count = 10¹⁰

CPI = 1.5

Clock cycle time = Execution time / (Instruction count * CPI)

Substitute corrsponding values.

Clock cycle time = 15 sec / (10¹⁰ * 1.5)

Clock cycle time = 1 * 10^-9 ps