If the associativity of a processor cache is doubled while keeping the capacity and block size unchanged, which one of the following is guaranteed to be NOT affected? , If the associativity of a processor cache is doubled while keeping the capacity and block size unchanged, which one of the following is guaranteed to be NOT affected?

Solution

D. Width of processor to main memory data bus

Explanation

When associativity is doubled, then the set offset will be effected, accordingly, the number of bits used for TAG comparator be effected.

Width of set index decoder also will be effected when set offset is changed.

Width of wag selection multiplexer wil be effected when the block offset is changed.

With of processor to main memory data bus is guaranteed to be NOT effected.