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Seo, Euiseong
School of Electrical and Computer Engineering
Research Interests
  • System software for flash memory
  • Embedded systems
  • Virtualization
  • Energy-efficient computing

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EXPLOITING TEMPORAL LOCALITY FOR ENERGY EFFICIENT MEMORY MANAGEMENT

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Title
EXPLOITING TEMPORAL LOCALITY FOR ENERGY EFFICIENT MEMORY MANAGEMENT
Author
Seo, EuiseongMaeng, SeungryoulLim, DonghyoukLee, Joonwon
Keywords
Memory management;  Power-aware computing;  Scheduling
Issue Date
2008-10
Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
Citation
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS, v.17, no.5, pp.929 - 941
Abstract
Memory is becoming one of the major power consumers in computing systems. Therefore, energy efficient memory management is essential. Modern memory systems employ sleep states for energy saving. To utilize this feature, existing research activities have concentrated on increasing spatial locality to deactivate as many blocks as possible. However, they did not count the unexpected activation of memory blocks due to cache eviction of deactivated tasks. In this paper, we suggest a software-based power state management scheme for memory, which exploits temporal locality to relieve the energy loss from the unexpected activation of memory blocks from cache eviction. The suggested scheme SW-NAP makes a memory block remain deactivated during a certain tick, which has no cache miss over the block. The evaluation shows that SW-NAP is 50% better than PAVM, which is an existing software scheme, and worse than PMU, which is another approach based on the specialized hardware by 20%. We also suggest task scheduling policies that increase the e. ectiveness of SW-NAP and they saved up to 7% additional energy.
URI
https://scholarworks.unist.ac.kr/handle/201301/9660
DOI
10.1142/S021812660800468X
ISSN
0218-1266
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