Cache Coherence: MESI Protocol and Data Transfers

This lecture covers the MESI protocol used for cache coherence in a system with multiple processors and caches. It explains the four states of the MESI protocol (Modified, Exclusive, Shared, Invalid) and the transitions between them. Examples are provided to illustrate how the protocol works in practice, including scenarios where data is read from or written to caches. The lecture also discusses the implications of enabling cache-to-cache communication under the MESI protocol, highlighting the potential benefits in terms of data transfer efficiency and performance.