GATE Computer Science (CS) 2020 Solved Papers

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Question : 54 of 65

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Consider a paging system that uses a 1-level page table residing in main memory and a TLB for address translation. Each main memory access takes 100 ns. TLB lookup takes 20 ns. Each page transfer to/from the disk takes 5000 ns. Assume that the TLB hit ratio is

95\%

, page fault rate is

10\%

. Assume that for

20\%

of the total page faults, a dirty page has to be written back to disk before required page is read in from disk. TLB update time is negligible. The average memory access time is ns (round off to 1 decimal places) is

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