申論題

7. Assuming a direct-mapped cache with four-word blocks and a total size of 16 words that is initially empty, label each reference in the list as a hit or a miss and show the final contents of the cache. Please copy Table 6-1 and Table 6-2 to your answer sheet and fill in your answers. Instruction fetch Reeister read Register write time 2 ns l ns 2 ns l ns 6 ns Clock cycle time Actual CPI

7.2 If we add a secondary cache that has a 10-ns access time for either a hit or a miss and is large enough to reduce the miss rate to main memory to 2%. What is the effective CPI for the machine with the two-level cache?