A majority-based control scheme for way-adaptable caches

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

1 Citation (Scopus)

Abstract

Considering the trade-off between performance and power consumption has become significantly important in microprocessor design. For this purpose, one promising approach is to employ way-adaptable caches, which adjust the number of cache ways available to a running application based on assessment of its working set size. However, in a very short period, the estimated working set size by cache access locality assessment may become different from that of the overall trend in a long period. Such a locality assessment result will cause excessive adaptation to allocate too many cache ways to a thread and, as a result, deteriorate the energy efficiency of way-adaptable caches. To avoid the excessive adaptation, this paper proposes a majority-based control scheme, in which the number of activated ways is adjusted based on majority voting of locality assessment results of several short sampling periods. By using majority voting, the proposed scheme can make way-adaptable caches less sensitive to the results of the periods including exceptional behaviors. The experimental results indicate that the proposed scheme can reduce the number of activated ways by up to 37% and on average by 9.4%, while maintaining performance compared with a conventional scheme, resulting in reduction of power consumption.

Original languageEnglish
Title of host publicationFacing the Multicore-Challenge - Aspects of New Paradigms and Technologies in Parallel Computing
Pages16-28
Number of pages13
DOIs
Publication statusPublished - 2010
EventConference for Young Scientists: Facing the Multicore-Challenge - Heidelberg, Germany
Duration: 2010 Mar 172010 Mar 19

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume6310 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Other

OtherConference for Young Scientists: Facing the Multicore-Challenge
CountryGermany
CityHeidelberg
Period10/3/1710/3/19

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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