Energy-aware data prefetching for multi-speed disks

Woo Son Seung, Mahmut Kandemir

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

39 Scopus citations


Power consumption of disk based storage systems is becoming an increasingly pressing issue for both commercial and scientific application domains. Prior work proposed several hardware based approaches to reducing disk power consumption by making use of techniques such as spinning down idle disks and rotating them at lower speeds than the maximum speed possible. While such techniques are certainly very important, it is also critical to consider the influence the software can exercise in shaping the power consumption behavior of disk-intensive application programs. Motivated by this, the main goal of this work is to study whether an optimizing compiler can be used for increasing the power benefits that could be obtained from multi-speed disks. Specifically, we propose and experimentally evaluate a compiler-directed energy-aware data prefetching scheme for scientific applications that process disk-resident data sets. This scheme automatically determines the prefetch distance for all disk access instructions, the disk speeds to be employed, and the associated disk layouts (striping parameters) in a unified setting. We implemented the proposed approach within an optimizing compiler framework and conducted experiments with several disk-intensive applications. Our experimental evaluation shows that the proposed approach brings significant reductions in disk energy consumption over a state-of-the-art software-based I/O prefetching mechanism that does not take into account energy consumption explicitly. Our results also show that the energy-aware prefetching scheme does not bring any extra performance penalties and the energy reductions achieved are consistent across a wide spectrum of values of the simulation parameters.

Original languageEnglish (US)
Title of host publicationProceedings of the 3rd Conference on Computing Frontiers 2006, CF '06
Number of pages10
StatePublished - 2006
Event3rd Conference on Computing Frontiers 2006, CF '06 - Ischia, Italy
Duration: May 3 2006May 5 2006

Publication series

NameProceedings of the 3rd Conference on Computing Frontiers 2006, CF '06


Other3rd Conference on Computing Frontiers 2006, CF '06

All Science Journal Classification (ASJC) codes

  • General Computer Science


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