2 votes 2 votes closed with the note: got the answer 5 stage pipeline → 3,6,5,8,4 latencies(in ns).What is average CPI of non pipelined CPU when speed up achieved by to pipeline is 4 ? (ans = 1.23) CO and Architecture co-and-architecture pipelining made-easy-test-series + – Satbir asked Jan 16, 2019 closed Sep 21, 2019 by Satbir Satbir 847 views comment Share Follow See all 6 Comments See all 6 6 Comments reply Hirak commented May 23, 2019 reply Follow Share @Satbir have u solved it by now? 0 votes 0 votes Hirak commented May 23, 2019 reply Follow Share @srestha Help! 0 votes 0 votes srestha commented May 23, 2019 reply Follow Share ans not matching right?? 0 votes 0 votes Hirak commented May 23, 2019 reply Follow Share Not able to understand the proper approach and formula to be used.. 0 votes 0 votes srestha commented May 23, 2019 reply Follow Share just formula need to use $Speedup=\frac{time for NonPipeline\times CPI_{np}}{time for Pipeline\times CPI_{pipe}}$ $4=\frac{26\times CPI}{8\times 1}$ Now find $CPI_{non-pipe}$ Pipeline CPI=1(known) 0 votes 0 votes Hirak commented May 23, 2019 reply Follow Share Thanks a Ton.. :) 1 votes 1 votes Please log in or register to add a comment.
Best answer 1 votes 1 votes We know ,Speed up=Time for Non-pipeline/Time for pipeline=Tnp * CPInp/Tp* CPIp We know,CPI for pipeline =1 Tnp=3+6+5+8+4=26 Tp=max(3,6,5,8,4)=8,Speedup=4(given) Putting the values ,we get CPI np=1.2 Akash Ghosh answered Sep 21, 2019 selected Sep 21, 2019 by Satbir Akash Ghosh comment Share Follow See all 0 reply Please log in or register to add a comment.