Decoupled Sectored Caches

  • Authors:
  • André Seznec

  • Affiliations:
  • IRISA Beaulieu, Rennes Cedex, France

  • Venue:
  • IEEE Transactions on Computers
  • Year:
  • 1997

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Abstract

Maintaining a low tag array size is a major issue in many cache designs. In the decoupled sectored cache, we present in this paper, the monolithic association between a cache block and a tag location is broken; the address tag location associated with a cache line location is dynamically chosen at fetch time among several possible locations.The hit ratio for a decoupled sectored cache is very close to the hit ratio for a nonsectored cache. Then a decoupled sectored cache will allow the same level of performance as a nonsectored cache, but at a significantly lower hardware cost.