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2007
ACM

Performance optimal processor throttling under thermal constraints

9 years 3 months ago
Performance optimal processor throttling under thermal constraints
We derive analytically, the performance optimal throttling curve for a processor under thermal constraints for a given task sequence. We found that keeping the chip temperature constant requires an exponential speed curve. Earlier works that propose constant throttling only keep the package/case temperature constant, and are hence suboptimal. We develop high-level thermal and power models that are simple enough for analysis, yet account for important effects like the power-density variation across a chip (hotspots), leakage dependence on temperature (LDT), and differing thermal characteristics of the silicon die and the thermal solution. We use a piecewiselinear approximation for the exponential leakage dependence on temperature, and devise a method to remove the circular dependency between leakage power and temperature. To solve the multitask speed control problem, we first solve analytically, the single task problem with a constraint on the final package temperature using optimal co...
Ravishankar Rao, Sarma B. K. Vrudhula
Added 12 Aug 2010
Updated 12 Aug 2010
Type Conference
Year 2007
Where CASES
Authors Ravishankar Rao, Sarma B. K. Vrudhula
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