An adaptive width data cache for low power design

Jiongyao Ye*, Takahiro Watanabe

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)


Reducing the power consumption is one of the most important design problems at present. Modern microprocessors employ caches to bridge the great speed variance between the main memory and the central processing unit, but these caches propose larger and larger proportion in the total power consumption. The Narrow-Width Value (NWV) occupies a large portion of cache access and storage. The storage space for value of any data width is the same in the cache, even if NWV needs only a few bits to be stored. This paper proposes an Adaptive Width Data Cache (AWDC) which exploits the popularity of NWV stored in the cache. In AWDC, the cache data array is divided into several data arrays to adapt different data width to access/store. Its purpose is shutting off corresponding unused high arrays to reduce its dynamic and static power consumption. AWDC achieves low power consumption only by the modification of the high-bit SRAM unit almost without any additional hardware, and does not affect cache performance. Experimental results employing SPEC 2000 benchmarks show that our proposed AWDC can reduce both the dynamic power consumption ant the static power consumption by 44.75% and 42.86%.

Original languageEnglish
Title of host publication2009 International SoC Design Conference, ISOCC 2009
Number of pages4
Publication statusPublished - 2009 Dec 1
Event2009 International SoC Design Conference, ISOCC 2009 - Busan, Korea, Republic of
Duration: 2009 Nov 222009 Nov 24

Publication series

Name2009 International SoC Design Conference, ISOCC 2009


Conference2009 International SoC Design Conference, ISOCC 2009
Country/TerritoryKorea, Republic of


  • Component
  • Data cache
  • Dynamic power
  • Low power
  • Nattow-width value
  • Static power

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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