Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
A New Generation of Real-Time Systems in the JET Tokamak
Year:2012
Research Areas
  • Electronic technology and of the communications
Information
Abstract
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.
International
Si
Congress
Real Time Conference (RT), 2012 18th IEEE-NPSS
960
Place
Berkeley, CA
Reviewers
Si
ISBN/ISSN
978-1-4673-1082-6
10.1109/RTC.2012.6418367
Start Date
11/06/2012
End Date
15/06/2012
From page
1
To page
9
Real TIME RT 2012 18th IEEE NPSS
Participants
  • Autor: Diogo Alves (IST)
  • Autor: A. Neto (IST)
  • Autor: D. Valcarcel (IST)
  • Autor: R. Felton (CCFE)
  • Autor: Juan Manuel Lopez Navarro (UPM)
  • Autor: A. Barbalace (ENEA)
  • Autor: L. Boncagni (ENEA)
  • Autor: P. Card (CCFE)
  • Autor: G. de Tommasi (ENEA-CREATE)
  • Autor: A. Goodyear (CCFE)
  • Autor: S. Jachmich (EFDA-CSU)
  • Autor: P.J. Lomas (CCFE)
  • Autor: F. Maviglia (ENEA-CREATE)
  • Autor: P. McCullen (CCFE)
  • Autor: A. Murari (ENEA)
  • Autor: M. Rainford (CCFE)
  • Autor: C. Reux (Ecole Polytechnique, LPP, CNRS UMR)
  • Autor: F. Rimini (CCFE)
  • Autor: F. Sartori (Fusion for Energy)
  • Autor: A.V. Stephen (CCFE)
  • Autor: J. Vega (CIEMAT)
  • Autor: R. Vitelli (Universit`a di Roma Tor Vergata)
  • Autor: L. Zabeo (TER)
  • Autor: K.D. Zastrow (CCFE)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Investigación en Instrumentación y Acústica Aplicada (I2A2)
  • Departamento: Sistemas Electrónicos y de Control
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)