Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"soft real-time"”.
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Probabilistic Analysis and Scheduling of Critical Soft Real -Time Systems
Allowing a real-time system to miss some deadlines in exchange for better average performance increases the possibility of overload. While overload in real-time systems has been studied, the emphasis has been on hard real-time systems in which overload is an exception whose occurrence is to be …
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CPU Service Classes: A Soft Real -Time Framework for Multimedia Applications
This thesis further expands on the DSRT system to a multi-resource management system, called QoS-Aware Resource Management Framework ( QualMan). QualMan manages various types of shared resources including the CPU, memory, and the network.
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Soft real time resource management for vision based internet of things systems
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Analysis of Performance and Power Aspects of Hypervisors in Soft Real-Time Embedded Systems
… exponential growth of malware designed to attack soft real-time embedded systems has necessitated solutions to secure these systems. Hypervisors are a solution, but the overhead imposed by them needs to be quantitatively understood. Experiments were conducted to quantify the overhead hypervisors …
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Soft Real-Time Switched Ethernet: Best-Effort Packet Scheduling Algorithm, Implementation, and Feasibility Analysis
… Packet Scheduling Algorithm(BPA), for real-time switched Ethernet networks. BPA considers a message model where application messages have trans-node timeliness requirements that are specified using Jensen's benefit functions. The algorithm seeks to maximize aggregate message benefit by …
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Heuristic Algorithms for Adaptive Resource Management of Periodic Tasks in Soft Real-Time Distributed Systems
Dynamic real-time distributed systems are characterized by significant run-time uncertainties at the mission and system levels. Typically, processing and communication latencies in such systems do not have known upper bounds and event and task arrivals and failure occurrences are …
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Analysis and design of resource allocation policies for cloud-based computing systems supporting soft real-time applications
… can provide an efficient means to support real-time applications with compute and/or communication deadlines, e.g., virtualized base station processing, and collaborative video conferencing. In many cases, such applications can tolerate occasional deadline violations without substantially …
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Scheduling Policy Design using Stochastic Dynamic Programming
Scheduling policies for open soft real-time systems must be able to balance the competing concerns of meeting their objectives under exceptional conditions while achieving good performance in the average case. Balancing these concerns requires modeling strategies that represent the range of …
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Optimality of Heuristic Schedulers in Utility Accrual Real-time Scheduling Environments
Scheduling decisions in soft real-time environments are based on a utility function. The goal of such schedulers is to use a best-effort approach to maximize the utility function and ensure graceful degradation at overloads. Utility Accrual (UA) schedulers use heuristics to maximize the accrued …
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Design automation and QoS requirements preservation for multiprocessor embedded systems
… that are carried out repeatedly within a certain time interval. Each task is characterized by its deadline where it is expected to perform a function producing a correct result within a specified amount of time. These tasks may be able to run in parallel to utilize the system efficiently. …
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Utility Accrual Real-time Channel Establishment in Multi-hop Networks
Real-time channels are established between a source and a destination to guarantee in-time delivery of real-time messages in multi-hop networks. In this thesis, we propose two schemes to establish real-time channels for soft real-time applications whose timeliness properties are characterized using …
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Developing safe and efficient robotic assistants for close-proximity human-robot collaboration
… thesis is the development and evaluation of a real-time safety system designed specifically for close-proximity human-robot interaction. The developed safety system, which uses a continuously updated virtual representation of the workspace for accurate human-robot separation distance …
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Scheduling Distributed Real-Time Tasks in Unreliable and Untrustworthy Systems
… dissertation, we consider scheduling distributed soft real-time tasks in unreliable (e.g., those with arbitrary node and network failures) and untrustworthy systems (e.g., those with Byzantine node behaviors). We present a distributed real-time scheduling algorithm called Gamma. Gamma considers a …
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Scheduling Algorithms for Real-Time Systems
Real-time systems are those whose correctness depends not only on logical results of computations, but also on the time at which the results are produced. This thesis provides a formal definition for real-time systems and includes the following original contributions on real-time scheduling …
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Collaborative Simulation of Reacting Flow and Controller in Chemical Looping Systems
… multiphase reactive flows. For the first time, detailed reacting flow patterns and system-level dynamics under active control are demonstrated, addressing critical challenges such as OC circulation, gas and fuel leakage, H2 production, CO2 capture, and low-rank fuel utilisation. The …
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Garbage Collection Scheduling for Utility Accrual Real-Time Systems
… Accrual (UA) scheduling is a method of dynamic real-time scheduling that is designed to respond to overload conditions by producing a feasible schedule that heuristically maximizes a pre-defined metric of utility. Whereas utility accrual schedulers have traditionally focused on CPU overload, …
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Quality and Utility - On the Use of Time-Value Functions to Integrate Quality and Timeliness Flexible Aspects in a Dynamic Real-Time Scheduling Environment
Scheduling methodologies for real-time applications have been of keen interest to diverse research communities for several decades. Depending on the application area, algorithms have been developed that are tailored to specific requirements with respect to both the individual components of which an …
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Towards Intelligent Videogame Generation
Multimedia content plays a pivotal role in contemporary society, permeating diverse facets of communication and entertainment. However, the creation of high-quality multimedia content often requires specialized expertise and equipment, limiting its widespread accessibility. To address these …
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Disturbance Rejection and Control in Web Servers
… of web sites on the Internet is the duration of time between the request of a web page until an answer has been returned. If this response time is too long, the user is likely to abandon the web site and search for other providers of the service. To avoid this loss of users, it is important for …
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Qos-aware fine-grained power management in networked computing systems
… for communication. In the context of networked real-time systems, the power dissipation on wireless communication is more significant than that on circuit board. We focus on packet scheduling for wireless real-time systems with renewable energy resources. In such a scenario, it is required to …
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