Cache controller design on ultra low leakage embedded processors

Zhao Lei, Hui Xu, Naomi Seki, Saito Yoshiki, Yohei Hasegawa, Kimiyoshi Usami, Hideharu Amano

Research output: Contribution to journalConference article

Abstract

A leakage-efficient cache controller design targeted on ultra low power embedded processors is proposed. The key insight is that a large circuits subset is accessed only when cache misses happen. By utilizing the fine-grained run-time power gating technique, such a subset can be dynamically powered-off as a power gated domain. Two simple but effective sleeping control policies are proposed to assure the leakage reduction effect; and to eliminate the impact of wake-up process, a latency cancellation mechanism is also proposed. Evaluation results show, in 90nm CMOS technology, 69% and 64% of leakage power can be reduced for instruction cache controller and data cache controller without performance degradation.

Original languageEnglish
Pages (from-to)171-182
Number of pages12
JournalLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume5455 LNCS
DOIs
Publication statusPublished - 2009 Apr 6
Event22nd International Conference on Architecture of Computing Systems - ARCS 2009 - Delft, Netherlands
Duration: 2009 Mar 102009 Mar 13

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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