Directory-based cache and snooping-based cache are two ways to organize cache structure. They are designed to share memory in multiple caches efficiently. While update scheme and invalidation scheme are two methods to ensure cache coherence. Whether to reserve the cache lines in other caches when modifying the current one is the difference between them.
These two concepts are orthogonal, and they can pair up freely.
Directory-based cache and snooping-based cache are two ways to organize cache structure. They are designed to share memory in multiple caches efficiently. While update scheme and invalidation scheme are two methods to ensure cache coherence. Whether to reserve the cache lines in other caches when modifying the current one is the difference between them.
These two concepts are orthogonal, and they can pair up freely.
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