Answer:
Achieved Instruction per cycle rate is [tex]4.11\times 10^{15}[/tex]
Solution:
As per the question:
Execution time, t = 1.4 s
No. of instructions being executed, n = 1.8 billion =
Clock speed of CPU, f = 3.2 GHz = [tex]3.2\times 10^{9} Hz[/tex]
Now, to calculate the actual issue rate achieved:
CPI (Cycle per Instruction) = [tex]\frac{t}{n\times f}[/tex]
CPI = [tex]\frac{1.4}{1.8\times 10^{6}\times 3.2\times 10^{9}}[/tex]
Instruction per cycle is given as the reciprocal of CPI:
Instruction per cycle = [tex]\frac{1.8\times 10^{6}\times 3.2\times 10^{9}}{1.4} = 4.11\times 10^{15}[/tex]
