What are coherence protocols?
Coherence protocols are mechanisms that ensure consistency in shared data across multiple caches in a computing system.
Why are they important in multi-core processors?
They are crucial because they help maintain data integrity and prevent issues like stale data when multiple cores access shared resources.
Can you give an example of a coherence protocol?
Sure! One common example is the MESI protocol, which stands for Modified, Exclusive, Shared, and Invalid states.
How does the MESI protocol work?
The MESI protocol uses these four states to manage cache lines, ensuring that any changes in one cache are reflected in others.
What happens if coherence protocols fail?
If they fail, it can lead to data corruption, inconsistencies, and unpredictable behavior in applications.
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