b. Assume a system that uses virtual memory with a single level page table and a translation lookaside buffer (TLB): i. Briefly explain the functionality of the TLB. ii. Assuming that the memory access time is 90ns, the time the operating system takes to search the TLB is 15ns, the TLB hit rate is 98%, the page fault rate is 20% and the time to fetch a page from the drive is 8ms. What is the average expected access time to main memory?

Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter11: Operating Systems
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question 3b

b. Assume a system that uses virtual memory with a single level page table and a translation
lookaside buffer (TLB):
i. Briefly explain the functionality of the TLB.
ii. Assuming that the memory access time is 90ns, the time the operating system takes
to search the TLB is 15ns, the TLB hit rate is 98%, the page fault rate is 20% and the
time to fetch a page from the drive is 8ms. What is the average expected access time
to main memory?
Transcribed Image Text:b. Assume a system that uses virtual memory with a single level page table and a translation lookaside buffer (TLB): i. Briefly explain the functionality of the TLB. ii. Assuming that the memory access time is 90ns, the time the operating system takes to search the TLB is 15ns, the TLB hit rate is 98%, the page fault rate is 20% and the time to fetch a page from the drive is 8ms. What is the average expected access time to main memory?
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