Scheduling component replacement for timely execution in dynamic systems

Romero, Julio Cano; García-Valls, Marisol

doi:10.1002/spe.2181

Cited by 18 publications

(8 citation statements)

References 30 publications

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“…In component-based systems, software reconfiguration often occurs by plugging components in/out or by changing component wirings [21]. Dedicated component models exist that allow developers to verify-using formal techniques such as model-checking-the correctness of new component configurations [20].…”

Section: Related Workmentioning

confidence: 99%

“…These attempts utilize language-or operating system-specific features that are often not available in typical CPS platforms, because of resource-constraints. Target platforms of these approaches are either the mainstream computing machines [8,21] or FPGAs [5], which greatly surpass CPS platforms in terms of available resources and energy consumption. Our solution, instead, is designed for resource-constrained devices, does not require any language-specific features such as reflection, and remains decoupled from the the underlying operating system.…”

Section: Related Workmentioning

confidence: 99%

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Programming support for time-sensitive adaptation in cyberphysical systems

Afanasov

Iavorskii²,

Mottola

2018

SIGBED Rev.

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Cyberphysical systems (CPS) integrate embedded sensors, actuators, and computing elements for controlling physical processes. Due to the intimate interactions with the surrounding environment, CPS software must continuously adapt to changing conditions. Enacting adaptation decisions is often subject to strict time requirements to ensure control stability, while CPS software must operate within the tight resource constraints that characterize CPS platforms. Developers are typically left without dedicated programming support to cope with these aspects. This results in either to neglect functional or timing issues that may potentially arise or to invest significant efforts to implement hand-crafted solutions. We provide programming constructs that allow developers to simplify the specification of adaptive processing and to rely on well-defined time semantics. Our evaluation shows that using these constructs simplifies implementations while reducing developers' effort, at the price of a modest memory and processing overhead.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Programming support for time-sensitive adaptation in cyberphysical systems

Afanasov

Iavorskii²,

Mottola

2018

SIGBED Rev.

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“…The work in explores the possibility of scheduling real‐time tasks with dynamic behavior. The traditional approach to guarantee deadlines is to provide tasks with resources enough for the worst case ever.…”

Section: Related Workmentioning

confidence: 99%

Freeze'nSense: estimation of performance isolation in cloud environments

2016

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Summary Modern computing hardware has a very good task parallelism, but resource contention between tasks remains high. This renders large fractions of CPU time wasted and leads to application interference. Even tasks running on dedicated CPU cores can still incur interference from other tasks, most notably because of the caches and other hardware components shared by more than one core. The level of interference depends on the nature of executed tasks and is difficult to predict. A customer who has been granted that his task will run as if it were alone (e.g., a CPU core dedicated to a virtual machine), indeed suffers from significant performance degradation due to the time spent waiting for resources occupied by other tasks. Measuring actual performance of a task or a virtual machine can be difficult. However, even more challenging is estimating what the performance of the task should be if it were running completely in isolation. In this paper, we present a measurement technique Freeze'nSense. It is based on the hardware performance counters and allows measuring actual performance of a task and estimating performance as if the task were in isolation, all during runtime. To estimate performance in isolation, the proposed technique performs a short‐time freezing of the potentially interfering tasks. Freeze'nSense introduces lower than 1% overhead and is confirmed to provide accurate and reliable measurements. In practice, Freeze'nSense becomes a valuable tool helping to automatically identify tasks that suffer the most in a shared environment and move them to a distant core. The observed performance improvement can be as large as 80–100% for individual tasks, and scale up to 15–20% for the computing node. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Enhancements to these technologies have improved their benefits for specific contexts, such as to support dinamic execution (Romero and García-Valls, 2014); for real-time reconfiguration of service-oriented architectures the iLAND middleware (García-Valls et al, 2013) provides time-bounded operation. Improved resource management to the operating systems has also enabled the higher efficiency in these solutions.…”

Section: Introductionmentioning

confidence: 99%

Prototyping low-cost and flexible vehicle diagnostic systems

García-Valls

2016

ADCAIJ

Self Cite

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Distribution middleware; Diagnostic systems; Software design Diagnostic systems are software and hardware-based equipment that interoperate with an external monitored system. Traditionally, they have been expensive equipment running test algorithms to monitor physical properties of, e.g., vehicles, or civil infrastructure equipment, among others. As computer hardware is increasingly powerful (whereas its cost and size is decreasing) and communication software becomes easier to program and more run-time efficient, new scenarios are enabled that yield to lower cost monitoring solutions. This paper presents a low cost approach towards the development of a diagnostic system relying on a modular componentbased approach and running on a resource limited embedded computer. Results on a prototype implementation are shown that validate the presented design, its flexibility, performance, and communication latency.

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Scheduling component replacement for timely execution in dynamic systems

Cited by 18 publications

References 30 publications

Programming support for time-sensitive adaptation in cyberphysical systems

Programming support for time-sensitive adaptation in cyberphysical systems

Freeze'nSense: estimation of performance isolation in cloud environments

Prototyping low-cost and flexible vehicle diagnostic systems

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