Author: Briegel, C.I.
Paper Title Page
S08NC02 Multi-Processor Network Implementations in Multibus II and VME 295
 
  • C.I. Briegel
    Fermilab, Batavia, Illinois, USA
 
  ACNET (Fermilab Accelerator Controls Network), a proprietary network protocol, is implemented in a multi-processor configuration for both Multibus II and VME. The implementations are contrasted by the bus protocol and software design goals. The Multibus II implementation provides for multiple processors running a duplicate set of tasks on each processor. For a network connected task, messages are distributed by a network round-routed for each task by user-callable commands. The VME implementation provides for multiple processors running one task across all processors. The process can either be fixed to a particular processor or dynamically allocated to an available processor depending on the scheduling algorithm of the multi-processing operating system.
Operated by Universities Research Association for the Department of Energy.
 
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S08NC02  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
S20PD02 Summary of Panel Discussion on Standards and World-Wide Sharing of Software 597
 
  • P.W. Lucas, C.I. Briegel
    Fermilab, Batavia, Illinois, USA
  • P.N. Clout
    VISTA, Los Alamos, NM, USA
  • D.P. Gurd
    SSCL, Dallas, TX, USA
  • N. Kanaya
    KEK, Ibaraki, Japan
  • U. Raich
    CERN, Meyrin, Switzerland
 
  It has been a dream in the accelerator community for some time that software developed for one control system be easily transferable to and usable at another. Until recently this goal was seldom realized in practice. This has been primarily because the various control systems have been developed inhouse with little standardization among them. The world of accelerators was dominated until a few years ago by very large machines constructed for doing high energy physics. The large laboratories could likewise afford large controls groups, which were able to build these complete systems from the ground up. However the accelerator scene has now shifted, with a large fraction of the new work being done at much smaller installations, installations which cannot afford the large staffs previously employed in control system production. Different approaches to this problem were outlined in the discussion.  
DOI • reference for this paper ※ doi:10.18429/JACoW-ICALEPCS1991-S20PD02  
About • Received ※ 11 November 1991 — Accepted ※ 20 November 1991 — Issued ※ 04 December 1992  
Cite • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)