# UGCNET-Oct2020-II: 18

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Consider a single-level page table system, with the page table stored in the memory. If the hit rate to TLB is $80\%$, and it takes $15$ nanoseconds to search the $TLB$, and $150$ nanoseconds to access the main memory, then what is the effective memory access time, in nanoseconds?

1. $185$
2. $195$
3. $205$
4. $175$

recategorized

EMAT= Hit (TLB access time +Main Memory access time)+Miss(TLB access time+2*Main memory access time )

= 0.8(15+150)+ 0.2(15+300)

=132+63 =195 ns

option 2 right ans

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