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Issue No. 02 - July-December (2009 vol. 8)
ISSN: 1556-6056
pp: 56-59
Alexandro Baldassin , State University of Campinas, Campinas
Felipe Klein , State University of Campinas, Campinas
Guido Araujo , State University of Campinas, Campinas
Rodolfo Azevedo , State University of Campinas, Campinas
Paulo Centoducatte , State University of Campinas, Campinas
The well-known drawbacks imposed by lock-based synchronization have forced researchers to devise new alternatives for concurrent execution, of which transactional memory is a promising one. Extensive research has been carried out on Software Transaction Memory (STM), most of all concentrated on program performance, leaving unattended other metrics of great importancel like energy consumption. This letter presents a thorough evaluation of energy consumption in a state-of-the-art STM. We show that energy and performance results do not always follow the same trend and, therefore, it might be appropriate to consider different strategies depending on the focus of the optimization. We also introduce a novel strategy based on dynamic voltage and frequency scaling for contention managers, revealing important energy and energy-delay product improvements in high-contended scenarios. This work is a first study towards a better understanding of the energy consumption behavior of STM systems, and could prompt STM designers to research new optimizations in this area, paving the way for an energy-aware transactional memory.
Energy-aware systems, Multiprocessor Systems, Measurement techniques, Concurrent Programming

F. Klein, A. Baldassin, G. Araujo, P. Centoducatte and R. Azevedo, "Characterizing the Energy Consumption of Software Transactional Memory," in IEEE Computer Architecture Letters, vol. 8, no. , pp. 56-59, 2009.
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