試題詳解

1.3 (2%) To solve the cache coherence problem, Snoopy protocol is the simplest. Regarding the Snoopy coherence protocol, what is the following description true?
(A) Any CPU should invalidate the cache block if it receives a write miss signal to the data in the local cache block from the bus.
(B) Any CPU should invalidate the cache block if it receives a read miss signal to the data in the local cache block from the bus.
(C) The Snoopy coherence protocol is an atomic operation.
(D) The Snoopy coherence protocol is proper to apply to a single-core system.