Cache Basics

A cache is:
1. a small memory
2. Fast Memory between the CPU and main memory that stores frequently accesos data.


Key parameters:
Cache Line Size: Number of bytes fetched at once (e.g., 64B).

Associativity: 
1. Direct-mapped, 
2. set-associative, 
3. or fully associative.

Replacement Policy: 
1. LRU, 
2. PLRU, 
3. Round Robin, 
4. etc.

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