Architectures and Processors forum Clean and Invalidate Cache Memory

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Clean and Invalidate Cache Memory

techguyz over 11 years ago

Hi experts,

Wat is the key difference between clean and invalidate the cache memory ?

How it is related to eviction of data into the external memory ?

What happens if any one of the operations alone carried out ?

Top replies

Martin Weidmann over 11 years ago +1 verified

Invalidate simply marks a cache line as "invalid", meaning you won't hit upon. Clean causes the contents of the cache line to be written back to memory (or the next level of cache), but only if the cache...