Xiaokun's Architecture Exploration Notes
Jan 9, 2020 · Fundamentals
Why CPU Caches Matter: Levels, Coherence, and Memory Barriers
CPU caches, organized into L1‑L3 levels, accelerate memory access by exploiting locality, but their independent copies can cause data inconsistency across cores; coherence protocols such as MESI and memory‑barrier instructions ensure that reads and writes remain ordered and visible across all processors.
CacheMESIcoherence
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