A new generation of real-time systems in the JET tokamak

López Navarro, Juan Manuel; Alves, Diogo; Neto, C. A.; Valcárcel, D.F.; Felton, R.; Barbalace, A.; Boncagni, L.; Card, P.; Tommasi, G. de; Goodyear, A.; Jachmich, S.; Lomas, P.J.; Maviglia, F.; McCullen, P.; Murari, A.; Rainford, M.; Reux, C.; Rimini, F.; Sartori, F.; Stephen, A.V.; Vega, J.; Vitelli, R.; Zabeo, L. y Zastrow, K.D. (2012). A new generation of real-time systems in the JET tokamak. En: "18th Real-Time Conference, June 11-15, 2012, Berkeley, CA", 11/06/2012 - 15/06/2012, Berkeley, CA. ISBN 978-1-4673-1082-6. pp. 1-9. https://doi.org/10.1109/RTC.2012.6418367.


Título: A new generation of real-time systems in the JET tokamak
  • López Navarro, Juan Manuel
  • Alves, Diogo
  • Neto, C. A.
  • Valcárcel, D.F.
  • Felton, R.
  • Barbalace, A.
  • Boncagni, L.
  • Card, P.
  • Tommasi, G. de
  • Goodyear, A.
  • Jachmich, S.
  • Lomas, P.J.
  • Maviglia, F.
  • McCullen, P.
  • Murari, A.
  • Rainford, M.
  • Reux, C.
  • Rimini, F.
  • Sartori, F.
  • Stephen, A.V.
  • Vega, J.
  • Vitelli, R.
  • Zabeo, L.
  • Zastrow, K.D.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 18th Real-Time Conference, June 11-15, 2012, Berkeley, CA
Fechas del Evento: 11/06/2012 - 15/06/2012
Lugar del Evento: Berkeley, CA
Título del Libro: Real Time Conference (RT), 2012 18th IEEE-NPSS
Fecha: 2012
ISBN: 978-1-4673-1082-6
Palabras Clave Informales: Real-Time, Linux, Nuclear Fusion.
Escuela: E.U.I.T. Telecomunicación (UPM) [antigua denominación]
Departamento: Sistemas Electrónicos y de Control [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Recently a new recipe for developing and deploying real-time systems has become increasingly adopted in the JET tokamak. Powered by the advent of x86 multi-core technology and the reliability of the JET’s well established Real-Time Data Network (RTDN) to handle all real-time I/O, an official Linux vanilla kernel has been demonstrated to be able to provide realtime performance to user-space applications that are required to meet stringent timing constraints. In particular, a careful rearrangement of the Interrupt ReQuests’ (IRQs) affinities together with the kernel’s CPU isolation mechanism allows to obtain either soft or hard real-time behavior depending on the synchronization mechanism adopted. Finally, the Multithreaded Application Real-Time executor (MARTe) framework is used for building applications particularly optimised for exploring multicore architectures. In the past year, four new systems based on this philosophy have been installed and are now part of the JET’s routine operation. The focus of the present work is on the configuration and interconnection of the ingredients that enable these new systems’ real-time capability and on the impact that JET’s distributed real-time architecture has on system engineering requirements, such as algorithm testing and plant commissioning. Details are given about the common real-time configuration and development path of these systems, followed by a brief description of each system together with results regarding their real-time performance. A cycle time jitter analysis of a user-space MARTe based application synchronising over a network is also presented. The goal is to compare its deterministic performance while running on a vanilla and on a Messaging Real time Grid (MRG) Linux kernel.

Más información

ID de Registro: 19860
Identificador DC: http://oa.upm.es/19860/
Identificador OAI: oai:oa.upm.es:19860
Identificador DOI: 10.1109/RTC.2012.6418367
URL Oficial: http://rt2012.lbl.gov/
Depositado por: Memoria Investigacion
Depositado el: 28 Mar 2014 19:41
Ultima Modificación: 21 Abr 2016 21:34
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