What are the main challenges of cache coherence in multi-core systems?

What are the main challenges of cache coherence in multi-core systems?

The main challenges include maintaining consistency, managing latency, and handling scalability as cores increase.

Can you explain how cache coherence protocols work?

Cache coherence protocols ensure that multiple caches reflect the same data by using mechanisms like MESI or MOESI.

What are the differences between snooping and directory-based protocols?

Snooping protocols rely on all caches monitoring the bus, while directory-based protocols use a central directory to track cache states.

How do these challenges affect system performance?

They can lead to increased latency, reduced throughput, and higher power consumption, impacting overall performance.

What solutions are there to improve cache coherence?

Solutions include optimizing protocols, using shared memory architectures, and implementing hardware support for better coherence.