Trends in multiprocessor and distributed operating systems designs

Tripathi, Anand; Karnik, Neeran M.

doi:10.1007/bf01245396

Cited by 7 publications

(3 citation statements)

References 83 publications

(88 reference statements)

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“…A multithreaded Operating System (OS) is needed, since various tasks are running simultaneously inside an MS. These tasks may run quasi-parallel [ 39 ], performing for example a measurement and a processing of unknown position. The OS represents the upper sub-layer of the system layer, which abstracts the hardware sub-layer (cf.…”

Section: General Architecture Of a Platform For Positioning Systemmentioning

confidence: 99%

Platform Architecture for Decentralized Positioning Systems

Kasmi

Norrdine

Blankenbach

2017

Sensors

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A platform architecture for positioning systems is essential for the realization of a flexible localization system, which interacts with other systems and supports various positioning technologies and algorithms. The decentralized processing of a position enables pushing the application-level knowledge into a mobile station and avoids the communication with a central unit such as a server or a base station. In addition, the calculation of the position on low-cost and resource-constrained devices presents a challenge due to the limited computing, storage capacity, as well as power supply. Therefore, we propose a platform architecture that enables the design of a system with the reusability of the components, extensibility (e.g., with other positioning technologies) and interoperability. Furthermore, the position is computed on a low-cost device such as a microcontroller, which simultaneously performs additional tasks such as data collecting or preprocessing based on an operating system. The platform architecture is designed, implemented and evaluated on the basis of two positioning systems: a field strength system and a time of arrival-based positioning system.

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Section: General Architecture Of a Platform For Positioning Systemmentioning

confidence: 99%

Platform Architecture for Decentralized Positioning Systems

Kasmi

Norrdine

Blankenbach

2017

Sensors

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“…As shown in Figure 3 , the hardware configuration affords, on the one hand, the MS sensing, storing and processing of sensory data and, on the other hand, the CDUs switching the coils. The tasks on the MS and the CDUs run quasi-parallel [ 36 ], performing both sampling the magnetic data and the synchronization task on the MS. In this case, a multithreaded operating system (OS) is needed, which represents the upper sub-layer of the system layer and relies on the bottom of the hardware sub-layer ( cf .…”

Section: Towards a Decentralized Milpsmentioning

confidence: 99%

Towards a Decentralized Magnetic Indoor Positioning System

Kasmi

Norrdine

Blankenbach

2015

Sensors

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Decentralized magnetic indoor localization is a sophisticated method for processing sampled magnetic data directly on a mobile station (MS), thereby decreasing or even avoiding the need for communication with the base station. In contrast to central-oriented positioning systems, which transmit raw data to a base station, decentralized indoor localization pushes application-level knowledge into the MS. A decentralized position solution has thus a strong feasibility to increase energy efficiency and to prolong the lifetime of the MS. In this article, we present a complete architecture and an implementation for a decentralized positioning system. Furthermore, we introduce a technique for the synchronization of the observed magnetic field on the MS with the artificially-generated magnetic field from the coils. Based on real-time clocks (RTCs) and a preemptive operating system, this method allows a stand-alone control of the coils and a proper assignment of the measured magnetic fields on the MS. A stand-alone control and synchronization of the coils and the MS have an exceptional potential to implement a positioning system without the need for wired or wireless communication and enable a deployment of applications for rescue scenarios, like localization of miners or firefighters.

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“…Existe um conjunto de atividades comuns para o escalonamento em geral, que são chamados mecanismos, e que são usados de diferentes maneiras e em diferentes combinações para implementar as políticas. Um exemplo de um mecanismo é a migração de processos, que corresponde ao transporte de um processo (ou partes de um processo) em execução de um processador origem para um processador destino (Tripathi & Karnik, 1995;Wibisono, 2002). Por isso, pode se dizer que um algoritmo de escalonamento implementa políticas, que por sua vez utilizam diversos mecanismos (Song et al, 1997).…”

Section: Escalonamento De Processosunclassified

Uma abordagem para a avaliação do escalonamento de processos em sistemas distribuídos baseada em monitoração

Souza¹

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An efficient process scheduling is of vital importance to the performance of a computer system. However, the existence of so many scheduling goals, workload types and computer system architectures makes it very difficult for a scheduling algorithm to sustain a good performance. Therefore, it is very important for the scheduling software to be capable of evaluating the computer system performance in order to guarantee the accomplishment of its scheduling goal. This thesis presents PSMS (Process Scheduling Monitoring System), an on-line monitoring system for evaluating the process scheduling. PSMS was designed to be flexible, and it is capable of communicating with any scheduler and of evaluating computer systems with different scheduling goals. The evaluation performed by PSMS is based on the analysis of performance metrics, which are chosen based on scheduling goals. Decision rules are applied on these metrics, generating a performance value that quantifies the performance of the computer system. The scheduling software has access to this performance measurement and, in case of poor performance, it can change the scheduling algorithm or perform a process migration in order to fíx the performance problem. This thesis presents a detailed description of the proposed monitoring approach and of the prototype tool developed. It also presents an analysis of performance metrics commonly used in process scheduling evaluation and a description of some decision rules. Some case studies of the use of decision rules on metrics are also discussed, demonstrating the viability of the monitoring approach proposed.

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Trends in multiprocessor and distributed operating systems designs

Cited by 7 publications

References 83 publications

Platform Architecture for Decentralized Positioning Systems

Platform Architecture for Decentralized Positioning Systems

Towards a Decentralized Magnetic Indoor Positioning System

Uma abordagem para a avaliação do escalonamento de processos em sistemas distribuídos baseada em monitoração

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