TLB misses

gate_forum asked Jan 13, 2019 • recategorized Jul 22, 2022 by Shubham Sharma 2

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1 votes

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muthu kumar asked Dec 16, 2018

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Os TLB question
How they calculated time for number of levels?

How they calculated time for number of levels?

muthu kumar

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muthu kumar asked Dec 16, 2018

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rahuljai asked Dec 3, 2018

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TLB OS
Why the formula used here is not P(10) + (1-P)(50) = 20 ?; A computer keeps its page tables in memory. The time required to read a word from the page table is 50ns. To reduce this overhead, the computer has a TLB, which holds 32 (virtual page, physical page frame) pairs and can ... : 10ns + (1 - p) 50ns = 20ns p =4/5 = .80 The TLB hit rate has to be 80% for a mean access time of 20ns.

Why the formula used here is not P(10) + (1-P)(50) = 20 ?;A computer keeps its page tables in memory. The time required to read a word from the pagetable is 50ns. To redu...

rahuljai

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rahuljai asked Dec 3, 2018

5 votes

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habedo007 asked Aug 8, 2017

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Multilevel TLB performance
A computer has a 128-entry $L_1$ TLB, 1024-entry $L_2$ TLB, and uses page size of 4KB. A program reads a 1MB array, one byte at a time from start to end, 10 times. Assuming the TLBs are directly mapped and initially empty, and no other memory is accessed, find TLB hits and misses of both $L_1$ and $L_2$ TLB (array is page aligned).

A computer has a 128-entry $L_1$ TLB, 1024-entry $L_2$ TLB, and uses page size of 4KB. A program reads a 1MB array, one byte at a time from start to end, 10 times. Assumi...

habedo007

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habedo007 asked Aug 8, 2017

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Neal Caffery asked Jan 17, 2017

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tlb segmentation paging
Consider a memory system consists of a single external cache with an access time of 30ns and a hit rate of 0.85, and a main memory with an access time of 80ns. Now we add virtual memory to the system. The TLB is implemented internal to the processor chip and takes ... memory access time of the system with virtual memory?( Marks: 0.00 ) 8ns 30ns 40ns 51ns

Consider a memory system consists of a single external cache with an access time of 30ns and a hit rate of 0.85, and a main memory with an access time of 80ns. Now we add...

Neal Caffery

912 views

Neal Caffery asked Jan 17, 2017

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TLB misses

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