1 votes 1 votes A translational look aside buffer is a hardware device used for speeding up the conversation from virtual address to physical address. Consider a memory management unit where a memory reference takes 500 nanoseconds; TLB (Translation Look aside Buffer) reference takes 40 nanoseconds; and the hit-rate achieved with the use of TLB is 80%. The speed-up (in %) we gained using TLB technique compared to the pure paging with no TLB ________. Operating System paging operating-system + – Shivangi Parashar 2 asked Nov 27, 2018 Shivangi Parashar 2 1.4k views answer comment Share Follow See all 6 Comments See all 6 6 Comments reply Soumya Tiwari commented Nov 27, 2018 reply Follow Share 64% .....? What's the ans given. 0 votes 0 votes Shivangi Parashar 2 commented Nov 27, 2018 reply Follow Share Elaborate it please. 0 votes 0 votes Soumya Tiwari commented Nov 27, 2018 reply Follow Share Is it correct? 0 votes 0 votes AakanshaF commented Nov 27, 2018 reply Follow Share is it 56 %? 0 votes 0 votes Hemanth_13 commented Nov 27, 2018 reply Follow Share @soumya Shouldn't it be 100/64 ?? 0 votes 0 votes Soumya Tiwari commented Nov 27, 2018 reply Follow Share Yes thanks :) You are correct it should be Speedup=(Execution time without TLB)/(Execution Time with TLB) =1000/640 Correct me if I'm wrong! 0 votes 0 votes Please log in or register to add a comment.
1 votes 1 votes without TLB, total time=2*memory access time=2*500ns=1000ns with TLB, total time=0.8(500+40)+0.2(40+1000)=640ns speed up=1000/640=1.56 diksha2512 answered Nov 27, 2018 diksha2512 comment Share Follow See all 0 reply Please log in or register to add a comment.