Publication Type |
Journal Article |
School or College |
College of Engineering |
Department |
Computing, School of |
Creator |
Balasubramonian, Rajeev |
Other Author |
Udipi, Aniruddha N.; Muralimanohar, Naveen |
Title |
Non-uniform power access in large caches with low-swing wires |
Date |
2009 |
Description |
Modern processors dedicate more than half their chip area to large L2 and L3 caches and these caches contribute significantly to the total processor power. A large cache is typically split into multiple banks and these banks are either connected through a bus (uniform cache access - UCA) or an on-chip network (non-uniform cache access - NUCA). Irrespective of the cache model (NUCA or UCA), the complex interconnects that must be navigated within large caches are found to be the dominant part of cache access power. While there have been a number of proposals to minimize energy consumption in the inter-bank network, very little attention has been paid to the optimization of intra-bank network power that contributes more than 50% of the total cache dynamic power in large cache banks. In this work we study various mechanisms that introduce low-swing wires inside cache banks as energy saving measures. We propose a novel non-uniform power access design, which when coupled with simple architectural mechanisms, provides the best power-performance tradeoff. The proposed mechanisms reduce cache bank energy by 42% while incurring a minor 1% drop in performance. |
Type |
Text |
Publisher |
Institute of Electrical and Electronics Engineers (IEEE) |
Subject |
Large caches; Low-swing wires; Non Uniform Cache Access; NUCA |
Subject LCSH |
Cache memory |
Language |
eng |
Bibliographic Citation |
Udipi, A. N., Muralimanohar, N., & Balasubrarmonian, R. (2009). Non-uniform power access in large caches with low-swing wires. 16th International Conference on High Performance Computing (HiPC), Kochi, December 2009. |
Rights Management |
(c) 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. |
Format Medium |
application/pdf |
Format Extent |
349,839 bytes |
Identifier |
ir-main,11496 |
ARK |
ark:/87278/s6j96qmm |
Setname |
ir_uspace |
ID |
703889 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6j96qmm |