What is cache coherency in multicore systems?
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What is cache coherency in multicore systems?
Cache coherency refers to the consistency of data stored in local caches of a multicore system. It ensures that changes in one cache are reflected in others.
Why is cache coherency important?
It's crucial for maintaining data integrity and performance in multicore systems, preventing stale data access.
What are the common protocols used for cache coherency?
Common protocols include MESI, MOESI, and MSI, which manage how caches communicate and maintain consistency.
Can you explain the MESI protocol?
Sure! MESI stands for Modified, Exclusive, Shared, and Invalid. It helps manage the state of cache lines to ensure coherency.
What challenges do developers face with cache coherency?
Developers face challenges like increased latency, complexity in protocol design, and performance bottlenecks due to coherency traffic.
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