What are the disadvantages of the MESI protocol?
The MESI protocol, while efficient, has several disadvantages including increased complexity, potential for deadlock, and higher overhead.
Can you explain the complexity issue?
Sure! The complexity arises from the need to manage multiple states for cache lines, which can complicate the design and implementation.
What about the deadlock problem?
Deadlock can occur when multiple processors are waiting for each other to release cache lines, leading to a standstill.
Are there any performance impacts?
Yes, the overhead of maintaining coherence can lead to performance degradation, especially in systems with many processors.
What alternatives exist to the MESI protocol?
Alternatives include the MOESI protocol, which adds an 'Owned' state, and directory-based protocols that can reduce overhead.
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