On the use of code mobility mechanisms in real-time systems

Abstract

Applications with soft real-time requirements can benefit from code mobility mechanisms, as long as those mechanisms support the timing and Quality of Service requirements of applications. In this paper, a generic model for code mobility mechanisms is presented. The proposed model gives system designers the necessary tools to perform a statistical timing analysis on the execution of the mobility mechanisms that can be used to determine the impact of code mobility in distributed real-time applications.Abstract -A pplications with soft real-time requirements can benefit from code mobility mechanisms, as long as those mechanisms support the timing and Q uality of Service requirements. In this paper, a generic model for code mobility mechanisms is presented. T he proposed model gives system designers the necessary tools to perform a statistical timing analysis on the execution of the mobility mechanisms that can be used to deter mine the impact of code mobility in distributed real-time applications.

Handling Mobility on a QoS-Aware Service-based Framework for Mobile Systems

“…In [4] we propose the division of state transfer in two phases, where during the first phase we assume that the service will not be stopped, e.g. it can be used to transfer the initialization parameters of a service.…”

“…QoS parameters, like timeliness and bandwidth requirements, must be considered both in the regular operation of the applications, and in reconfiguration transients. Code mobility can have a large impact on the system's performance [4]. Such operations may, momentarily, require large amounts of resources such as network bandwidth (to transfer code and state), and CPU time (needed to reconfigure the system).…”