The TLB hit ratio is 98%. It takes 20 nanoseconds to search the TLB and 100 nanoseconds to access…
A TLB hit takes 20 + 100 = 120 nanoseconds. A miss takes 20 + 100 + 100 = 220 nanoseconds because the page-table entry must also be read from memory. The effective time is…
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The TLB hit ratio is 98%. It takes 20 nanoseconds to search the TLB and 100 nanoseconds to access memory. What will be the effective memory access time ?
Answer and explanation
Correct answer B
A TLB hit takes 20 + 100 = 120 nanoseconds. A miss takes 20 + 100 + 100 = 220 nanoseconds because the page-table entry must also be read from memory. The effective time is 0.98 × 120 + 0.02 × 220 = 122 nanoseconds.
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Madhya Pradesh SET (MP SET)