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Open AccessFeature PaperArticle

TaPT: Temperature-Aware Dynamic Cache Optimization for Embedded Systems

1
Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721, USA
2
Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL 32611, USA
*
Author to whom correspondence should be addressed.
Computers 2018, 7(1), 3; https://doi.org/10.3390/computers7010003
Received: 24 November 2017 / Revised: 19 December 2017 / Accepted: 20 December 2017 / Published: 22 December 2017
(This article belongs to the Special Issue Multi-Core Systems-On-Chips Design and Optimization)
Embedded systems have stringent design constraints, which has necessitated much prior research focus on optimizing energy consumption and/or performance. Since embedded systems typically have fewer cooling options, rising temperature, and thus temperature optimization, is an emergent concern. Most embedded systems only dissipate heat by passive convection, due to the absence of dedicated thermal management hardware mechanisms. The embedded system’s temperature not only affects the system’s reliability, but can also affect the performance, power, and cost. Thus, embedded systems require efficient thermal management techniques. However, thermal management can conflict with other optimization objectives, such as execution time and energy consumption. In this paper, we focus on managing the temperature using a synergy of cache optimization and dynamic frequency scaling, while also optimizing the execution time and energy consumption. This paper provides new insights on the impact of cache parameters on efficient temperature-aware cache tuning heuristics. In addition, we present temperature-aware phase-based tuning, TaPT, which determines Pareto optimal clock frequency and cache configurations for fine-grained execution time, energy, and temperature tradeoffs. TaPT enables autonomous system optimization and also allows designers to specify temperature constraints and optimization priorities. Experiments show that TaPT can effectively reduce execution time, energy, and temperature, while imposing minimal hardware overhead. View Full-Text
Keywords: dynamic thermal management; low-power embedded systems; phase-based tuning; temperature-aware tuning; energy savings; dynamic optimization; configurable caches; dynamic voltage and frequency scaling dynamic thermal management; low-power embedded systems; phase-based tuning; temperature-aware tuning; energy savings; dynamic optimization; configurable caches; dynamic voltage and frequency scaling
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Adegbija, T.; Gordon-Ross, A. TaPT: Temperature-Aware Dynamic Cache Optimization for Embedded Systems. Computers 2018, 7, 3.

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