Effective Access Time Associative Lookup =8 time unit; memory cycle time =t time unit; Hit ratio a Effective Access Time(EAT) EAT=(t+8)α+(2t+8)(1-ax) 2t +a-to ft(20ns),t(100ns),a1(80%),02(98%) TLB hit: 20+100=120 ns TLB miss:20+100+100=220ns EAT1=120*0.8+220*0.2=140ns EAT2=120*098+220*0.02=122nsEffective Access Time ◼ Associative Lookup =  time unit; memory cycle time = t time unit; Hit ratio =  • Effective Access Time (EAT) EAT = (t + )  + (2t + )(1 – ) = 2t +  – t • If (20 ns), t(100 ns), 1(80%), 2(98%): • TLB hit: 20+100=120 ns • TLB miss: 20+100+100=220 ns • EAT1 = 120*0.8 + 220 * 0.2 = 140 ns • EAT2 = 120*0.98 + 220 * 0.02 = 122 ns