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Computación y Sistemas

Print version ISSN 1405-5546


GUEVARA LOPEZ, Pedro; MEDEL, J. J.  and  CRUZ PEREZ, Daniel. Dynamical Model for a Real-Time Task. Comp. y Sist. [online]. 2004, vol.8, n.1, pp.61-73. ISSN 1405-5546.

Static scheduling techniques [1] are based on the hypothesis that the arrival times set and tasks execution times are known previously; while dynamical techniques [1] are generally based on scheduling servers. However, in both cases the real-time task behavior and their arrival times are unknown. It is impossible to talk about predictability without knowing those task dynamics. In this paper, we propose a dynamical model for arrival times and execution times, both based on ARMA models that include jitter and external perturbations of processor, in consequence deadlines are determined. With this model it is possible to know periodic, sporadic and aperiodic tasks behavior in a probability sense.

Keywords : Arrival; computation; model; deadline; Real-time.

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