The main disadvantage of direct mapping of cache organization is that

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The main disadvantage of direct mapping of cache organization is that

Vivek Kumar · Accepted Answer

the cache hit ratio is degreaded if two or more blocks used alternatively map onto the same block frame in the cache. Explanation: Explanation: In Direct Mapping, every block of main memory has exactly one specific line in the cache where it can be stored. This relationship is defined by the formula: The Problem (Thrashing): Because multiple main memory blocks map to the same single cache line, a conflict occurs if a program needs to access two different blocks that happen to map to the same spot. If the program alternates between these two blocks, the CPU will constantly kick one out to bring the other in. This leads to a massive drop in the hit ratio, even if the rest of the cache is completely empty.

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