What are the main challenges of cache coherence in multi-core processors?
The main challenges include maintaining consistency across caches, handling latency, and ensuring scalability.
Can you explain why maintaining consistency is so difficult?
Maintaining consistency is difficult because multiple cores may read and write to shared data simultaneously, leading to stale or conflicting data.
What techniques are used to address these challenges?
Techniques like directory-based coherence, snooping protocols, and cache coherence protocols like MESI are commonly used.
How do these techniques impact system performance?
They can improve performance by reducing latency and ensuring data consistency, but they may also introduce overhead.
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