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What is a 4 way cache?
Assume a four-way set, that is, each location in the cache stores four lines of data, and each line contains 16 bytes. Then, for a total cache data size of 8 KB, there will be 128 locations, since 128 locations × 4 lines/location × 16 bytes/line = 8 KB.
Which cache mapping technique is best?
Set associative cache mapping combines the best of direct and associative cache mapping techniques. Usually, the cache memory can store a reasonable number of blocks at any given time, but this number is small compared to the total number of blocks in the main memory.
How many sets are in a 4 way associative cache?
Four-Way Set Associative Cache 28 = 256 sets each with four ways (each with one block).
How is cache offset calculated?
The block offset is just the memory address mod 2n. For example, we can find address 13 in a 4-block, 2-byte per block cache. — The block address is 13 / 2 = 6, so the index is then 6 mod 4 = 2. — The block offset would be 13 mod 2 = 1.
What’s the difference between cache way and cache set?
The cache you are referring to is known as set associative cache. The whole cache is divided into sets and each set contains 4 cache lines (hence 4 way cache). So the relationship stands like this : cache size = number of sets in cache * number of cache lines in each set * cache line size. Your cache size is 32KB, it is 4 way
What is the name of the 4 way cache?
The cache you are referring to is known as set associative cache. The whole cache is divided into sets and each set contains 4 cache lines(hence 4 way cache).
How big is a two way set associative cache?
Organization of two-way set-associative cache Assume a four-way set, that is, each location in the cache stores four lines of data, and each line contains 16 bytes. Then, for a total cache data size of 8 KB, there will be 128 locations, since 128 locations × 4 lines/location × 16 bytes/line = 8 KB.
How are two lines of data stored in a cache?
As before, we assume that a line of data comprises 16 bytes, but now two lines of data are stored in each cache location. The two lines in each cache location are collectively called a set. Now, when two addresses from the microcomputer map to the same cache set, both lines of data can be stored in the set.