Dynamic Clock Reconfiguration for the Constrained IoT and its Application to Energy-efficient Networking
Research output: Contribution to book/Conference proceedings/Anthology/Report › Conference contribution › Contributed › peer-review
Contributors
Abstract
Clock configuration takes a key role in tuning constrained general-purpose microcontrollers for performance, timing accuracy, and energy efficiency. Configuring the underlying clock tree, however, involves a large parameter space with complex dependencies and dynamic constraints. We argue for clock configuration as a generic operating system module that bridges the gap between highly configurable but complex embedded hardware and easy application development. In this paper, we propose a method and a runtime subsystem for dynamic clock reconfiguration on constrained Internet of Things (IoT) devices named ScaleClock. ScaleClock derives measures to dynamically optimize clock configurations by abstracting the hardware-specific clock trees. The Scale-Clock system service grants portable access to the optimization potential of dynamic clock scaling for applications. We implement the approach on the popular IoT operating system RIOT for two target platforms of different manufacturers and evaluate its performance in static and dynamic scenarios on real devices. We demonstrate the potential of ScaleClock by designing a platform-independent dynamic voltage and frequency scaling (DVFS) mechanism that enables RIOT to autonomously adapt the hardware performance to requirements of the software currently executed. In a use case study, we manage to boost energy efficiency of constrained network communication by reducing the MCU consumption by 40 % at negligible performance impact.
Details
Original language | English |
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Title of host publication | EWSN '22: Proceedings of the 2022 International Conference on Embedded Wireless Systems and Networks |
Editors | Alois Ferscha, Mun Choon Chan, Salil Kanhere, Ranga Rao Venkatesha Prasad |
Publisher | Association for Computing Machinery (ACM), New York |
Pages | 168-179 |
Publication status | Published - 2022 |
Peer-reviewed | Yes |
Publication series
Series | EWSN: Embedded Wireless Systems and Networks |
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ISSN | 2562-2331 |
Conference
Title | 19th International Conference on Embedded Wireless Systems and Networks |
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Abbreviated title | EWSN 2022 |
Conference number | 19 |
Duration | 3 - 5 October 2022 |
Website | |
Degree of recognition | International event |
Location | Johannes Kepler University |
City | Linz |
Country | Austria |
External IDs
ORCID | /0000-0002-3825-2807/work/142241906 |
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Keywords
Research priority areas of TU Dresden
DFG Classification of Subject Areas according to Review Boards
Subject groups, research areas, subject areas according to Destatis
Sustainable Development Goals
ASJC Scopus subject areas
Keywords
- DVFS, Embedded Systems, Energy