MobiCom '96 Proceedings of the 2nd annual international conference on Mobile computing and networking
Agile application-aware adaptation for mobility
Proceedings of the sixteenth ACM symposium on Operating systems principles
Monitoring system activity for OS-directed dynamic power management
ISLPED '98 Proceedings of the 1998 international symposium on Low power electronics and design
Voltage scheduling problem for dynamically variable voltage processors
ISLPED '98 Proceedings of the 1998 international symposium on Low power electronics and design
On-line scheduling of hard real-time tasks on variable voltage processor
Proceedings of the 1998 IEEE/ACM international conference on Computer-aided design
Power conscious fixed priority scheduling for hard real-time systems
Proceedings of the 36th annual ACM/IEEE Design Automation Conference
Energy-aware adaptation for mobile applications
Proceedings of the seventeenth ACM symposium on Operating systems principles
System-level power optimization: techniques and tools
ACM Transactions on Design Automation of Electronic Systems (TODAES)
Power analysis of embedded operating systems
Proceedings of the 37th Annual Design Automation Conference
An adaptive algorithm for low-power streaming multimedia processing
Proceedings of the conference on Design, automation and test in Europe
ASPLOS IX Proceedings of the ninth international conference on Architectural support for programming languages and operating systems
Every joule is precious: the case for revisiting operating system design for energy efficiency
EW 9 Proceedings of the 9th workshop on ACM SIGOPS European workshop: beyond the PC: new challenges for the operating system
A scheduling model for reduced CPU energy
FOCS '95 Proceedings of the 36th Annual Symposium on Foundations of Computer Science
Performance Analysis of a RTOS by Emulation of an Embedded System
RSP '99 Proceedings of the Tenth IEEE International Workshop on Rapid System Prototyping
Voltage-Clock-Scaling Adaptive Scheduling Techniques for Low Power in Hard Real-Time Systems
RTAS '00 Proceedings of the Sixth IEEE Real Time Technology and Applications Symposium (RTAS 2000)
Real-Time Task Scheduling for a Variable Voltage Processor
Proceedings of the 12th international symposium on System synthesis
Proceedings of the Conference on Design, Automation and Test in Europe
Variants of priority scheduling algorithms for reducing context-switches in real-time systems
ICDCN'06 Proceedings of the 8th international conference on Distributed Computing and Networking
A context-switch reduction heuristic for power-aware off-line scheduling
ACSAC'06 Proceedings of the 11th Asia-Pacific conference on Advances in Computer Systems Architecture
Functional-Level Energy Characterization of µC/OS-II and Cache Locking for Energy Saving
Bell Labs Technical Journal
Measurement-based research on cryptographic algorithms for embedded real-time systems
Journal of Systems Architecture: the EUROMICRO Journal
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In this paper we propose a methodology to analyze the energy overhead due to the presence of an embedded operating system in a wearable device. Our objective is to determine the key parameters affecting the energy consumption of the RTOS allowing the development of more efficient OS-based power management policies. To achieve this target, we propose a characterization strategy that stimulates the RTOS both at the kernel and at the I/O driver level by analyzing various OS-related parameters. Our analisys focus in particular on the relationship between energy consumption and processor frequency characterizing the different functionalities of an RTOS, suggesting a way to develop effective OS-aware energy optimization policies based on variable voltage and frequency. Experimental results are presented for eCos, an open-source embedded OS ported and installed on a prototype of wearable device, the HP SmartBadgeIII.