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https://en.wikipedia.org/wiki/Cache_coherence
Theoretically, coherence can be performed at the load/store granularity. However, in practice it is generally performed at the granularity of cache blocks.[3]
https://www.geeksforgeeks.org/cache-coherence/
Cache coherence is the discipline that ensures that changes in the values of shared operands are propagated throughout the system in a timely fashion.
http://tutorials.jenkov.com/java-concurrency/cache-coherence-in-java-concurrency.html