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Energy saving strategies for parallel applications with point-to-point communication phases

TitleEnergy saving strategies for parallel applications with point-to-point communication phases
Publication TypeJournal Article
Year of Publication2013
AuthorsSundriyal, V, Sosonkina, M, Gaenko, A, Zhang, Z
JournalJournal of Parallel and Distributed Computing
Date Published08
Type of ArticleArticle
ISBN Number0743-7315
Accession NumberWOS:000325308600013
Keywordsdistributed data interface, Dynamic voltage and frequency scaling, GAMESS, Multicore platforms, Point-to-point communications

exploited to maximize energy savings while the application performance loss and frequency switching overheads must be carefully balanced. This paper advocates for a runtime assessment of such overheads by means of characterizing point-to-point communications into phases followed by analyzing the time gaps between the communication calls. Certain communication and architectural parameters are taken into consideration in the three proposed frequency scaling strategies, which differ with respect to their treatment of the time gaps. The experimental results are presented for NAS parallel benchmark problems as well as for the realistic parallel electronic structure calculations performed by the widely used quantum chemistry package GAMESS. For the latter, three different process-to-core mappings were studied as to their energy savings under the proposed frequency scaling strategies and under the existing state-of-the-art techniques. Close to the maximum energy savings were obtained with a low performance loss of 2% on the given platform. (C) 2013 Elsevier Inc. All rights reserved.

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