What is the impact of cache coherence on latency in computer systems?

What is the impact of cache coherence on latency in computer systems?

Cache coherence ensures that multiple caches in a system reflect the most recent data. This can reduce latency by minimizing the need for memory access.

Can you explain how cache coherence protocols work?

Sure! Cache coherence protocols, like MESI, manage how caches communicate to maintain consistency, which can affect latency.

What are the different types of cache coherence protocols?

There are several types, including directory-based and snoopy protocols, each with its own impact on latency and performance.

How does latency change with different cache sizes?

Larger caches can reduce latency by storing more data closer to the CPU, but they may also introduce complexity in coherence.

What are the trade-offs between cache coherence and performance?

The trade-offs include increased complexity and potential latency due to coherence management versus improved data access times.