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Journal of applied research and technology
versão On-line ISSN 2448-6736versão impressa ISSN 1665-6423
J. appl. res. technol vol.8 no.2 Ciudad de México Ago. 2010
Scheduling strategy for RealTime Distributed Systems
A. MenéndezLeonel de Cervantes *1, H. BenítezPérez 2
1,2 Departamento de Ingeniería de Sistemas Computacionales y Automatización, IIMAS, Universidad Nacional Autónoma de México Apdo. Postal 20726. Del. A. Obregón, México D.F. CP. 01000, México. Fax: ++52 55 5616 01 76, Tel: ++52 55 5622 36 39 *Email: amenendezl@uxmcc2.iimas.unam.mx
ABSTRACT
The objective of this paper is to show the use of a global Scheduling Strategy based on the analysis of a RealTime Distributed System. The use of a Networked Controlled System as a case study shows that the performance of the system depends not only on the sampling periods of its individual components, but also on the time dispersion amongst these periods. It is also shown that it is possible to have a schedulable but unstable RTDS.
Keywords: realtime, scheduler, distributed system, network control system.
RESUMEN
El objetivo de este artículo es presentar el uso de una "Estrategia de planificación" global basada en el análisis de un Sistema Distribuido en TiempoReal (RTDS). El uso de un sistema controlado por red (NCS) como caso de estudio que consiste de un helicóptero de dos rotores, muestra que el desempeño del RTDS depende no solamente de los periodos de muestreo de sus componentes individuales, sino también de las relaciones temporales entre ellos. También se muestra que es posible tener un RTDS planificadle pero inestable.
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