Chapter 9 เทคโนโลยีหน่วยความจำ Memory Technology

2. Chapter 9เทคโนโลยีหน่วยความจำMemory Technology

3. เนื้อหา โครงสร้างของหน่วยความจำ หน่วยความจำแคชในไมโครโพรเซสเซอร์ การออกแบบหน่วยความจำแคชแบบต่างๆ - Direct mappe - Fully associative - Set associative

4. Technology Trend Capacity Speed Logic : 2x in 3 years 2x in 3 years DRAM : 4x in 3 years 2x in 10 years Disk : 4x in 3 years 2x in 10 years

5. Processor-DRAM memory Gap

6. Expanded of Memory System

7. Hierarchy of Modern computer

8. How hierarchy manage? • Registers <--> Memory • by compiler • Cache <--> Memory • by Hardware • Memory <--> Disks • by Hardware/OS, programmer (files)

9. Logic Diagram of a Typical SRAM

10. Typical of SRAM Timing

11. Classical DRAM Organization

12. Logic Diagram of a Typical DRAM

13. Art of Memory Design

14. 1 KB Direct Mapped Cache with 32 B Blocks

15. Example : Fully Associative

16. A Two-way Set Associative Cache

17. Disadvantage of Set Associative Cache

18. How do you Design Cache?

19. 1 KB Direct mapped Cache, 32B blocks

20. Improvement of Cache • Reduce Miss rate • Reduce Miss penalty • Reduce time to hit in cache

21. Where can a block be placed in the upper level?

22. Example

23. จบ บทที่ 9