What is cache coherence and why is it important in multi-core systems?
Cache coherence ensures that multiple caches in a multi-core system reflect the most recent writes to shared data, preventing inconsistencies.
What are the common protocols used for maintaining cache coherence?
Common protocols include MESI (Modified, Exclusive, Shared, Invalid), MOESI, and MSI, each with different states for cache lines.
Can you explain how the MESI protocol works?
Sure! The MESI protocol uses four states for cache lines: Modified, Exclusive, Shared, and Invalid, to manage data consistency.
What challenges might I face when implementing cache coherence?
Challenges include increased latency, complexity in protocol design, and potential performance bottlenecks due to coherence traffic.
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