NotesDefintion
All coherence transactions involve at least two steps, and some involve three. The parties involved are the Requester, the Directory, and occasionally the Owner.
| High-level description of MESI directory protocol. In each transition, the cache controller that requests the transaction is denoted “Req.” |
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| Figure 8.6 https://pages.cs.wisc.edu/~markhill/papers/primer2020_2nd_edition.pdf |
