@TechReport{	  it:2013-020,
  author	= {Dimitar Lukarski and Tobias Skoglund},
  title		= {A Priori Power Estimation of Linear Solvers on Multi-Core
		  Processors},
  institution	= {Department of Information Technology, Uppsala University},
  department	= {Division of Scientific Computing},
  year		= {2013},
  number	= {2013-020},
  month		= sep,
  abstract	= {High-performance computing (HPC) centres simulate complex
		  scientific models which provide vital understanding of our
		  world. In the recent years, power efficiency has become a
		  critical aspect in the new HPC facilities because of high
		  energy consumption costs. In this work, we present our
		  study on power consumption of linear solvers on modern
		  multi-core CPUs which are widely used in many scientific
		  applications. We focus on both dense and sparse linear
		  solvers - parallel direct solvers for the dense, and
		  parallel iterative methods for the sparse problems.
		  
		  We provide answers to the questions -- what is the energy
		  efficiency using multi-core parallel algorithms for linear
		  systems and do we save energy using more cores?
		  Furthermore, we propose a methodology for estimating total
		  power consumption. Based on benchmarks which achieve high
		  accuracy we estimate total power usage of the whole
		  solution phase on multi-core CPUs.}
}