Its main disadvantage is that there is a fixed cache location for any given block. The direct mapping technique is simple and inexpensive to implement. J= main memory block which is to be mapped. The simplest technique, known as direct mapping, maps each block of main memory into only one possible cache line. Three techniques can be used: direct, associative, and set associative. ![]() The choice of the mapping function dictates how the cache is organized. ![]() Needed for determining which main memory block currently occupies a cache line. Needed for mapping main memory blocks into cache lines. ![]() Because there are fewer cache lines than main memory blocks, an algorithm is
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