Memory Wall

• Computer Systems
• Processor speed increased by 55% every year.
  • $\log(2) \over \log(1.55)$ gives $1.58$, aligning with the Moore's Law.
• Memory speed increased by 7% every year.
• Latency gets higher and higher between the processor and memory
• Solution with Latency and Throughput
  • Improve Latency
    • Improve the speed of memory itself (hard!)
    • Put memory closer to the processor or within the processor.
  • Improve Throughput
    • Organize more efficiently
    • Hierarchy of Memories
    • Principles of Locality