This paper describes an embedded system for real-time human motion detection using a fixed camera. A modified version of the Codebook algorithm is developed to detect moving objects. This algorithm provides fast backg...
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Dynamic Voltage Scaling (DVS) and Dynamic Power Management (DPM) techniques form the basis of numerous energy management schemes proposed for real-timeembedded systems. DVS targets reducing the dynamic CPU energy con...
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Dynamic Voltage Scaling (DVS) and Dynamic Power Management (DPM) techniques form the basis of numerous energy management schemes proposed for real-timeembedded systems. DVS targets reducing the dynamic CPU energy consumption, while DPM attempts to reduce theenergy consumption of idle devices by putting them to low-power states over sufficiently long intervals. It is imperative that the system-wide energy management schemes efficiently integrate DVS and DPM while exploiting the subtle trade-off dimensions. In this paper, we develop and propose a unified framework for periodic real-time tasks where DVS and DPM are judiciously combined. The framework, called DFR-EDF, assumes a general system-level energy model and includes both static and dynamic(online) components. The static part is based on the extension of the recently proposed Device Forbidden Regions (DFRs) approach to Earliest-Deadline-First (EDF) scheduling. The online component integrates the predictive DPM techniques and offers a generalized slack reclaiming mechanism that can be used by DVS and DPM simultaneously. Our experimental evaluation indicates significant gains of DFR-EDF at the system-level compared to the state-of-the-art solutions. Finally, this research effort makes another contribution by formally showing that optimally solving the DPM problem in periodic real-time execution settings is NP-Hard in the strong sense, even in the absence of DVS.
This paper presents mathematical representation of the Running Discrete Fourier Transform (RDFT) and proposes an architecture for selective harmonics device using RDFT. We used 'one multiplier and two adders' ...
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DVFS is an efficient energy saving technique for processors during program execution time. In this paper, a critical speed-based DVFS mechanism that we have implemented on the Android operating system is introduced. O...
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Supervisory Control and Data Acquisition (SCADA) systems control and monitor industrial and critical infrastructure functions, such as electricity, gas, water, waste, railway and traffic. Recently, SCADA systems have ...
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The development of multi-core system is ushering in the computer revolution, which strongly drives the programming towards the parallel direction. Software pipeline is one kind of efficient parallel task building. The...
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A combination of a scratchpad and scratchpad memory management unit (SMMU) has been proposed as a way to implement fast and time-predictable memory access operations in programs that use dynamic data structures. A mem...
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A combination of a scratchpad and scratchpad memory management unit (SMMU) has been proposed as a way to implement fast and time-predictable memory access operations in programs that use dynamic data structures. A memory access operation is time-predictable if its execution time is known or bounded-this is important within a hard real-time task so that the worst-case execution time (WCET) can be determined. However, the requirement for time-predictability does not remove the conventional requirement for efficiency: operations must be serviced as quickly as possible under worst-case conditions. This paper studies the capabilities of the SMMU when applied to a number of benchmark programs. A new allocation algorithm is proposed to dynamically manage the scratchpad space. In many cases,the SMMU vastly reduces the number of accesses to dynamic data structures stored in external memory along the worst-case execution path (WCEP). Across all the benchmarks,an average of 47% of accesses are rerouted to scratchpad, with nearly 100% for some programs. In previous scratchpad-based work, time-predictability could only be assured for these operations using external *** paper also examines situations in which the SMMU does not perform so well, and discusses how these could be addressed.
The proceedings contain 98 papers. The topics discussed include: certification of embedded software - impact of ISO DIS 26262 in the automotive domain;enforcing applicability of real-time scheduling theory feasibility...
ISBN:
(纸本)3642165575
The proceedings contain 98 papers. The topics discussed include: certification of embedded software - impact of ISO DIS 26262 in the automotive domain;enforcing applicability of real-time scheduling theory feasibility tests with the use of design-patterns;compiler-support for robust multi-core computing;analyzing the security in the GSM radio network using attack jungles;model-driven design-space exploration for embedded systems: the Octopus toolset;special track on worst case traversal time (WCTT);HATS: highly adaptable and trustworthy software using formal methods;LivingKnowledge: kernel methods for relational learning and semantic modeling;self-adaptation and evolution by learning: description of EternalS Task Force 3;adaptive composition of conversational services through graph planning encoding;performance prediction of service-oriented systems with layered queueing networks;and ten years of performance evaluation for concurrent systems using CADP.
The proceedings contain 98 papers. The topics discussed include: certification of embedded software - impact of ISO DIS 26262 in the automotive domain;enforcing applicability of real-time scheduling theory feasibility...
ISBN:
(纸本)3642165605
The proceedings contain 98 papers. The topics discussed include: certification of embedded software - impact of ISO DIS 26262 in the automotive domain;enforcing applicability of real-time scheduling theory feasibility tests with the use of design-patterns;compiler-support for robust multi-core computing;analyzing the security in the GSM radio network using attack jungles;model-driven design-space exploration for embedded systems: the Octopus toolset;special track on worst case traversal time (WCTT);HATS: highly adaptable and trustworthy software using formal methods;LivingKnowledge: kernel methods for relational learning and semantic modeling;self-adaptation and evolution by learning: description of EternalS Task Force 3;adaptive composition of conversational services through graph planning encoding;performance prediction of service-oriented systems with layered queueing networks;and ten years of performance evaluation for concurrent systems using CADP.
This article draws on domain of common IT remote monitoring of the implementation of the plan. From the application point of view to design a real-time and reliable serial device remote monitoring system, causes not t...
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