Energy optimization for a two-device data flow chain

Ravishankar Rao, Sarma Vrudhula

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

3 Scopus citations

Abstract

Many applications running on today's portable devices use multiple power-consuming devices simultaneously, often in the form of a data flow chain which involves transfer of data between devices through buffers. Some of these devices have the ability to scale their performance and power simultaneously by tuning one of their parameters (generically called the device speed). We address the problem of minimizing the energy consumed by a two-device data flow chain by choosing the speed profiles of the two devices and the "cycle time" of the intermediate buffer. Determining the speed profiles (functions of time) to minimize the energy functional, in general, requires variational techniques. However, based on certain observations about device power-speed relations and application performance constraints, we were able to solve the problem analytically in two steps - device characterization and cycle time optimization. The effectiveness of the technique was demonstrated for two practical applications of dataflow chains - CD recording and VCD playback with up to 45% and 64% energy improvements, respectively.

Original languageEnglish (US)
Title of host publicationIEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers, ICCAD
Pages268-274
Number of pages7
StatePublished - 2004
Externally publishedYes
EventICCAD-2004 - IEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers - San Jose, CA, United States
Duration: Nov 7 2004Nov 11 2004

Other

OtherICCAD-2004 - IEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers
CountryUnited States
CitySan Jose, CA
Period11/7/0411/11/04

ASJC Scopus subject areas

  • Engineering(all)

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    Rao, R., & Vrudhula, S. (2004). Energy optimization for a two-device data flow chain. In IEEE/ACM International Conference on Computer-Aided Design, Digest of Technical Papers, ICCAD (pp. 268-274). [4B.1]