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Paper Abstract and Keywords
Presentation 2009-03-05 15:45
Single-Cycle-Accessible Two-Level Cache Architecture
Seiichiro Yamaguchi, Tohru Ishihara, Hiroto Yasuura (Kyushu Univ.) CPSY2008-91 DC2008-82
Abstract (in Japanese) (See Japanese page) 
(in English) A small L0-cache located between an MPU core and an L1-cache is widely used in embedded processors for reducing the energy consumption of memory subsystems. Since the L0-cache is small, if there is a hit, the energy consumption will be reduced. On the other hand, if there is a miss, at least one extra cycle is needed to access the L1-cache. This degrades the processor performance. Single-cycle-accessible Two-level Cache (STC) architecture proposed in this paper can resolve the problem in the conventional L0-cache based approach. Both a small L0 and a large L1 caches in our STC architecture can be accessed from an MPU core within a single cycle. A compilation technique for e®ectively utilizing the STC architecture is also presented in this paper. Experiments using several benchmark programs demonstrate that our approach reduces the energy consumption of memory subsystems by 64% in the best case and by 41% on an average without any performance degradation compared to the conventional L0-cache based approach.
Keyword (in Japanese) (See Japanese page) 
(in English) Embedded system / Cache memory / Energy consumption / / / / /  
Reference Info. IEICE Tech. Rep., vol. 108, no. 464, DC2008-82, pp. 19-24, March 2009.
Paper # DC2008-82 
Date of Issue 2009-02-26 (CPSY, DC) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF CPSY2008-91 DC2008-82

Conference Information
Conference Date 2009-03-05 - 2009-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Sado Island Integrated Development Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) ETNET2009 
Paper Information
Registration To DC 
Conference Code 2009-03-DC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Single-Cycle-Accessible Two-Level Cache Architecture 
Sub Title (in English)  
Keyword(1) Embedded system  
Keyword(2) Cache memory  
Keyword(3) Energy consumption  
1st Author's Name Seiichiro Yamaguchi  
1st Author's Affiliation Kyushu University (Kyushu Univ.)
2nd Author's Name Tohru Ishihara  
2nd Author's Affiliation Kyushu University (Kyushu Univ.)
3rd Author's Name Hiroto Yasuura  
3rd Author's Affiliation Kyushu University (Kyushu Univ.)
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Date Time 2009-03-05 15:45:00 
Presentation Time 30 
Registration for DC 
Paper # IEICE-CPSY2008-91,IEICE-DC2008-82 
Volume (vol) IEICE-108 
Number (no) no.463(CPSY), no.464(DC) 
Page pp.19-24 
#Pages IEICE-6 
Date of Issue IEICE-CPSY-2009-02-26,IEICE-DC-2009-02-26 

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