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2008 International Conference on Parallel Architectures and Compilation Techniques (PACT) (2008)
Toronto, ON, Canada
Oct. 25, 2008 to Oct. 29, 2008
ISBN: 978-1-5090-3021-7
pp: 177-186
Ke Meng , EECS Department, Northwestern University, Evanston, IL, USA
Russ Joseph , EECS Department, Northwestern University, Evanston, IL, USA
Robert P. Dick , EECS Department, Northwestern University, Evanston, IL, USA
Li Shang , ECE Department, University of Colorado, Boulder, USA
ABSTRACT
The emergence of power as a first-class design constraint has fueled the proposal of a growing number of run-time power optimizations. Many of these optimizations trade-off power saving opportunity for a variable performance loss which depends on application characteristics and program phase. Furthermore, the potential benefits of these optimizations are sometimes non-additive, and it can be difficult to identify which combinations of these optimizations to apply. Trial-and-error approaches have been proposed to adaptively tune a processor. However, in a chip multiprocessor, the cost of individually configuring each core under a wide range of optimizations would be prohibitive under simple trial-and-error approaches. In this work, we introduce an adaptive, multi-optimization power saving strategy for multi-core power management. Specifically, we solve the problem of meeting a global chip-wide power budget through run-time adaptation of highly configurable processor cores. Our approach applies analytic modeling to reduce exploration time and decrease the reliance on trial-and-error methods. We also introduce risk evaluation to balance the benefit of various power saving optimizations versus the potential performance loss. Overall, we find that our approach can significantly reduce processor power consumption compared to alternative optimization strategies.
INDEX TERMS
Optimization, Multicore processing, Radiation detectors, Throughput, Software, Analytical models, Monitoring,Voltage/Frequency Scaling, ChipMulti-Processor, Dynamic Power Management, Cache Resizing
CITATION
Ke Meng, Russ Joseph, Robert P. Dick, Li Shang, "Multi-Optimization power management for chip multiprocessors", 2008 International Conference on Parallel Architectures and Compilation Techniques (PACT), vol. 00, no. , pp. 177-186, 2008, doi:
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