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Measuring & Improving Cache Performance. measurement and analysis of cache performance look at two different techniques for improving cache performance: adding associativity to the cache to reduce the miss rate Use of multi-level caches to reduce the miss penalty.

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measuring improving cache performance
Measuring & Improving Cache Performance
  • measurement and analysis of cache performance
  • look at two different techniques for improving cache performance:
    • adding associativity to the cache to reduce the miss rate
    • Use of multi-level caches to reduce the miss penalty
reducing cache misses by more flexible placement of blocks
Reducing Cache misses by more flexible placement of blocks
  • Fully asscoative caches allow blocks to be placed anywhere in the cache
    • Have to search every tag field for every memory access
  • Set associative cache allows blocks to be placed in a fixed number of locations in the cache
    • an n-way set associative cache allows a block to be placed in one of n locations in the cache
slide5
All caches can be considered as being set associative
  • Increasing associatively tends to decrease the miss rate
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