calculate the effective access time

Question

This is a paragraph from Operating System Concepts, 9th edition by Silberschatz et al:

The percentage of times that the page number of interest is found i

Answer 1

General Formula for EAT

Hit ratio = a

Main Memory access time = m

Associative Lookup (TLB access) = e

EAT = (m + e) a + (2m + e) (1 - a)

    = 2m - ma + e