Question

3. 12+2-4 points] We are comparing the two caches in Problem 1 and Problem 2. Suppose both caphes have a hit time of 2 cycles. The cache in Problem 1 has a miss penalty of 15 cycles. The one in Problem 2 has a miss penalty of 25 cycles. Calculate the total time taken (in cycles) for all accesses, for each cache. Which cache is better- the one in Problem 1 or Problem 2? 3. 12+2-4 points] We are comparing the two caches in Problem 1 and Problem 2. Suppose both caphes have a hit time of 2 cycles. The cache in Problem 1 has a miss penalty of 15 cycles. The one in Problem 2 has a miss penalty of 25 cycles. Calculate the total time taken (in cycles) for all accesses, for each cache. Which cache is better- the one in Problem 1 or Problem 2? - 10 points 1. [3 +2+5 ] Suppose we have a 2KB direct-mapped data cache with 4-byte blocks. (a) Show how a 32-bit memory address is divided into tag, index and offset. Show clearly how many bits are in each field. (b) How many total bits are there in this cache? (c) Consider this address trace: 0x404c4958 0x404c46d8 0x404c4944 0x404c86d8 0x40544944 For this cache, for each address in the above trace, show the tag, index and offset in binary. Indicate whether each reference is a hit or a miss. What is the miss rate? 2. 13+2+5-10 points] Suppose we have a 2KB 8-way set-associative data cache with 32-byte blocks. a) Show how a 32-bit memory address is divided into tag, index and offset. Show clearly how many bits are in each field. (8 points) b) How many total bits are there in this cache? c) Consider this address trace: 0x48034760 0x48014554 0x48014560 0x48014760 0x48014558 For this cache, for each address in the above trace, show the tag, index and offset in binary. Indicate whether each reference is a hit or a miss. What is the miss rate? Doblem 2 Sunpose bo

Answer 1

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