Assume the percentage of time that could be spent in IO for

Assume the percentage of time that could be spent in I/O for a computer is %15. Now, we speed up the CPU by a factor of 10, while neglecting I/O. How much speedup will this machine really get?

Solution

let the time taken by cpu is 100.

for I/O time taken is 15.

total =115

Speeding up Cpu by 10 so it becomes 90.I/O is still 15

total =105

Improvement =10

% improvement=(10/115)*100 =8.69%