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Chương 8
Hệ thống bộ nhớ
Khoa KTMT Thiều Xuân Khánh 1
Nội dung
1. Các cấp bộ nhớ (Memory Hierarchy) 2. Bộ nhớ cache (Cache Memory)
3. Bộ nhớ trong (Main Memory) 4. Bộ nhớ ảo (Virtual Memory)
Khoa KTMT Thiều Xuân Khánh 2
Các cấp bộ nhớ (Memory Hierarchy)
Registers – In CPU
Internal or Main memory
– May include one or more levels of cache – “RAM”
External memory – Backing store
Khoa KTMT Thiều Xuân Khánh 3
Memory Hierarchy - Diagram
Performance
Access time
– Time between presenting the address and getting the valid data Memory Cycle time
– Time may be required for the memory to “recover” before next access – Cycle time is access + recovery
Transfer Rate
– Rate at which data can be moved
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