naa a22 4500 510791093 CHVBK 20180411083320.0 cr unu---uuuuu 180411e20130301xx s 000 0 eng 10.1007/s11334-012-0184-5 doi (NATIONALLICENCE)springer-10.1007/s11334-012-0184-5 User-defined schedulers for real-time concurrent objects [Elektronische Daten] [Joakim Bjørk, Frank de Boer, Einar Johnsen, Rudolf Schlatte, S. Tapia Tarifa] Scheduling concerns the allocation of processors to processes, and is traditionally associated with low-level tasks in operating systems and embedded devices. However, modern software applications with soft real-time requirements need to control application-level performance. High-level scheduling control at the application level may complement general purpose OS level scheduling to fine-tune performance of a specific application, by allowing the application to adapt to changes in client traffic on the one hand and to low-level scheduling on the other hand. This paper presents an approach to express and analyze application-specific scheduling decisions during the software design stage. For this purpose, we integrate support for application-level scheduling control in a high-level object-oriented modeling language, Real-Time ABS, in which executable specifications of method calls are given deadlines and real-time computational constraints. In Real-Time ABS, flexible application-specific schedulers may be specified by the user, i.e., developer, at the abstraction level of the high-level modeling language itself and associated with concurrent objects at creation time. Tool support for Real-Time ABS is based on an abstract interpreter that supports simulations and measurements of systems at the design stage. Springer-Verlag London Limited, 2012 Scheduling policies nationallicence Real-time nationallicence Modeling languages nationallicence Object orientation nationallicence Operational semantics nationallicence Bjørk Joakim University of Oslo, Oslo, Norway aut de Boer Frank CWI, Amsterdam, The Netherlands aut Johnsen Einar University of Oslo, Oslo, Norway aut Schlatte Rudolf University of Oslo, Oslo, Norway aut Tapia Tarifa S. University of Oslo, Oslo, Norway aut Innovations in Systems and Software Engineering Springer-Verlag 9/1(2013-03-01), 29-43 1614-5046 9:1<29 2013 9 11334 https://doi.org/10.1007/s11334-012-0184-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11334-012-0184-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bjørk Joakim University of Oslo, Oslo, Norway aut NATIONALLICENCE 700 1- de Boer Frank CWI, Amsterdam, The Netherlands aut NATIONALLICENCE 700 1- Johnsen Einar University of Oslo, Oslo, Norway aut NATIONALLICENCE 700 1- Schlatte Rudolf University of Oslo, Oslo, Norway aut NATIONALLICENCE 700 1- Tapia Tarifa S. University of Oslo, Oslo, Norway aut NATIONALLICENCE 773 0- Innovations in Systems and Software Engineering Springer-Verlag 9/1(2013-03-01), 29-43 1614-5046 9:1<29 2013 9 11334 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer