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Lecture Notes for CSE 140 - Computer Architecture with Yang at UC-Merced (UC Merced)

Notes Information

Material Type:Class Note
Professor:Yang
Class:CSE 140 - Computer Architecture
Subject:Computer Science & Engineering
University:University of California-Merced
Term:Spring Semester 2000
Keywords:
  • Memory Hierarchy
  • Complicated
  • Instructions
  • Immediately
  • Assumptions
  • Memory References
  • Organization
  • Instruction
  • Code Example
  • Exclusive Or
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Sample Document Text

Chapter 5 Large and Fast: Exploiting Memory Hierarchy Chapter 5 - Large and Fast: Exploiting Memory Hierarchy - 2 Memory Technology ? Static RAM (SRAM) ? 0.5ns - 2.5ns, $2000 - $5000 per GB ? Implemented with inverting gates or CMOS technology ? Dynamic RAM (DRAM) ? 50ns - 70ns, $20 - $75 per GB ? Implemented with capacitors ? Need to be refreshed periodically ? Magnetic disk ? 5ms - 20ms, $0.20 - $2 per GB ? Ideal memory ? Access time of SRAM ? Capacity and cost/GB of disk 5.1 Introd uctio n Chapter 5 - Large and Fast: Exploiting Memory Hierarchy - 3 Principle of Locality ? Programs access a small proportion of their address space at any time ? Temporal locality ? Items accessed recently are likely to be accessed again soon ? e.g., instructions in a loop, induction variables ? Spatial locality ? Items near those accessed recently are likely to be accessed soon ? e.g., sequential instruction access, array data Memory Hierarchy Chapter 5 - Large and Fast: Exploiting ...

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