Example
P, a 33 MIP processor gets 30% LD instructions. Then, P makes 107 load requests/second.
Assume L1 and L2 together serve 95% of the requests. Then, Main Memory serves 5 x 105 requests/second.
Assume Disk can serve 50 requests/second.
Main Memory Disk Requests Program Hit Rate per second Execution Time
100% 0 1.0 (normalized) 99.999% 5 . 99.99% 50 . 99.9% 50 . 90.0% 50 .