What are the different cache coherence techniques used in multiprocessor systems?
The main cache coherence techniques include directory-based, snooping, and MESI protocols. Each has its own advantages.
Can you explain how the MESI protocol works?
Sure! MESI stands for Modified, Exclusive, Shared, and Invalid. It helps maintain coherence by tracking the state of each cache line.
What are the pros and cons of using a directory-based approach?
Directory-based approaches can reduce traffic by keeping track of which caches have copies of data, but they can introduce latency.
How do these techniques impact system performance?
The choice of cache coherence technique can significantly affect performance, as it influences latency, bandwidth usage, and scalability.
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