TProf: An energy profiler for task-parallel programs

Ioannis Manousakis, Foivos S. Zakkak, Polyvios Pratikakis, Dimitrios S. Nikolopoulos

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
312 Downloads (Pure)

Abstract

We present TProf, an energy profiling tool for OpenMP-like task-parallel programs. To compute the energy consumed by each task in a parallel application, TProf dynamically traces the parallel execution and uses a novel technique to estimate the per-task energy consumption. To achieve this estimation, TProf apportions the total processor energy among cores and overcomes the limitation of current works which would otherwise make parallel accounting impossible to achieve. We demonstrate the value of TProf by characterizing a set of task parallel programs, where we find that data locality, memory access patterns and task working sets are responsible for significant variance in energy consumption between seemingly homogeneous tasks. In addition, we identify opportunities for fine-grain energy optimization by applying per-task Dynamic Voltage and Frequency Scaling (DVFS).
Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalSustainable Computing: Informatics and Systems
Volume5
Early online date12 Aug 2014
DOIs
Publication statusPublished - Mar 2015

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