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Regression Modelling of Power Consumption for Heterogeneous Processors

Tahir Diop
Departement of Electrical and Computer Engineering, University of Toronto
University of Toronto, 2013

@phdthesis{diop2013regression,

   title={Regression Modelling of Power Consumption for Heterogeneous Processors},

   author={Diop, Tahir},

   year={2013},

   school={University of Toronto}

}

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This thesis is composed of two parts, that relate to both parallel and heterogeneous processing. The first describes DistCL, a distributed OpenCL framework that allows a cluster of GPUs to be programmed like a single device. It uses programmer-supplied meta-functions that associate work-items to memory. DistCL achieves speedups of up to 29x using 32 peers. By comparing DistCL to SnuCL, we determine that the compute-to-transfer ratio of a benchmark is the best predictor of its performance scaling when distributed. The second is a statistical power model for the AMD Fusion heterogeneous processor. We present a systematic methodology to create a representative set of compute micro-benchmarks using data collected from real hardware. The power model is created with data from both micro-benchmarks and application benchmarks. The model showed an average predictive error of 6.9% on heterogeneous workloads. The Multi2Sim heterogeneous simulator was modified to support configurable power modelling.
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