Power M{anag|easur}ement (PM2)

Overview

The PM2 project is focussed on power conservation for energy limited devices.

There is an abundance of work in the area, much of which makes naive assumptions about the way hardware consumes energy, which are supported by inadequate methods of estimating a system's energy consumption.

We use measurements of power consumption in various parts of real hardware (instead of simulation and other commonly used estimation techniques) to evaluate and optimise our solutions, and as a result, the research is applicable. We are also investigating state-based and performance-counter based techniques for providing cheap feedback for software developers without instrumented hardware.

Some of our experimental work is carried out on an in house developed Xscale processor board dubbed PLEB 2.

Our investigation into dynamic voltage scaling shows that many of the assumptions made in academic research invalidate the (otherwise interesting) solutions to the dynamic voltage scaling problem.

Publications

		Etienne Le Sueur and Simon Rodgers Operating system support for the heterogeneous OMAP4430: A tale of two micros 13th Linux.conf.au, Ballarat, Australia, January, 2012
		Etienne Le Sueur An analysis of the effectiveness of energy management on modern computer processors, MSc Thesis, School of Computer Science and Engineering, University of NSW, Sydney 2052, Australia, 2011
		Etienne Le Sueur and Gernot Heiser Slow down or sleep, that is the question Proceedings of the 2011 USENIX Annual Technical Conference, Portland, OR, USA, June, 2011
		Etienne Le Sueur and Bernard Blackham e4meter: Power management for the people 12th Linux.conf.au, Brisbane, Australia, January, 2011
		Etienne Le Sueur and Gernot Heiser Dynamic voltage and frequency scaling: The laws of diminishing returns Proceedings of the 2010 Workshop on Power Aware Computing and Systems (HotPower'10), Vancouver, Canada, October, 2010
		Aaron Carroll and Gernot Heiser An analysis of power consumption in a smartphone Proceedings of the 2010 USENIX Annual Technical Conference, Boston, MA, USA, June, 2010
		David C. Snowdon OS-Level power management, PhD Thesis, School of Computer Science and Engineering, University of NSW, Sydney 2052, Australia, 2010
		David C. Snowdon, Etienne Le Sueur, Stefan M. Petters and Gernot Heiser Koala: A platform for OS-level power management Proceedings of the 4th EuroSys Conference, Nuremberg, Germany, April, 2009
		Martin P. Lawitzky, David C. Snowdon and Stefan M. Petters Integrating real time and power management in a real system Proceedings of the 4th Workshop on Operating System Platforms for Embedded Real-Time Applications, Prague, Czech Republic, July, 2008
		David C. Snowdon, Stefan M. Petters and Gernot Heiser Accurate on-line prediction of processor and memory energy usage under voltage scaling Proceedings of the 7th International Conference on Embedded Software, Salzburg, Austria, October, 2007
		David C. Snowdon, Godfrey van der Linden, Stefan M. Petters and Gernot Heiser Accurate run-time prediction of performance degradation under frequency scaling Proceedings of the 3rd Workshop on Operating System Platforms for Embedded Real-Time Applications, Pisa, Italy, July, 2007
		David C. Snowdon, Sergio Ruocco and Gernot Heiser Power management and dynamic voltage scaling: Myths and facts Proceedings of the 2005 Workshop on Power Aware Real-time Computing, New Jersey, USA, September, 2005 Preliminary workshop version
		David Andrews, Iain Bate, Thomas Nolte, Clara Otero-Perez and Stefan M. Petters Impact of embedded systems evolution on RTOS use and design Proceedings of the 1st Workshop on Operating System Platforms for Embedded Real-Time Applications, Palma, Mallorca, Spain, July, 2005
		David C. Snowdon, Stefan M. Petters and Gernot Heiser Power measurement as the basis for power management Proceedings of the 1st Workshop on Operating System Platforms for Embedded Real-Time Applications, Palma, Mallorca, Spain, July, 2005