NSTX-U Advances in Real-Time C++11 on Linux

Erickson, Keith G.

doi:10.1109/TNS.2015.2448106

Title: NSTX-U Advances in Real-Time C++11 on Linux

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Abstract

Programming languages like C and Ada combined with proprietary embedded operating systems have dominated the real-time application space for decades. The new C++11standard includes native, language-level support for concurrency, a required feature for any nontrivial event-oriented real-time software. Threads, Locks, and Atomics now exist to provide the necessary tools to build the structures that make up the foundation of a complex real-time system. The National Spherical Torus Experiment Upgrade (NSTX-U) at the Princeton Plasma Physics Laboratory (PPPL) is breaking new ground with the language as applied to the needs of fusion devices. A new Digital Coil Protection System (DCPS) will serve as the main protection mechanism for the magnetic coils, and it is written entirely in C++11 running on Concurrent Computer Corporation's real-time operating system, RedHawk Linux. It runs over 600 algorithms in a 5 kHz control loop that determine whether or not to shut down operations before physical damage occurs. To accomplish this, NSTX-U engineers developed software tools that do not currently exist elsewhere, including real-time atomic synchronization, real-time containers, and a real-time logging framework. Together with a recent (and carefully configured) version of the GCC compiler, these tools enable data acquisition, processing, and output using a conventional operatingmore »« less

Authors:

Erickson, Keith G. ^[1]

Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Publication Date:: Fri Aug 14 00:00:00 EDT 2015

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

OSTI Identifier:: 1172639

Report Number(s):: PPPL-5046
Journal ID: ISSN 0018-9499; TRN: US1500485

Grant/Contract Number:: AC02-09CH11466

Resource Type:: Accepted Manuscript

Journal Name:: IEEE Transactions on Nuclear Science

Additional Journal Information:: Journal Volume: 62; Journal Issue: 4; Conference: 2014 IEEE-NPSS Real Time (RT) Conference, Nara (Japan), 26-30 May 2014; Journal ID: ISSN 0018-9499

Publisher:: Institute of Electrical and Electronics Engineers (IEEE)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Erickson, Keith G. NSTX-U Advances in Real-Time C++11 on Linux.  United States: N. p., 2015. 
Web.  doi:10.1109/TNS.2015.2448106.

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                    Erickson, Keith G. NSTX-U Advances in Real-Time C++11 on Linux.  United States.  https://doi.org/10.1109/TNS.2015.2448106

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                    Erickson, Keith G. Fri .  
"NSTX-U Advances in Real-Time C++11 on Linux".  United States.  https://doi.org/10.1109/TNS.2015.2448106.  https://www.osti.gov/servlets/purl/1172639.

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@article{osti_1172639,

  title        = {NSTX-U Advances in Real-Time C++11 on Linux},

  author       = {Erickson, Keith G.},

  abstractNote = {Programming languages like C and Ada combined with proprietary embedded operating systems have dominated the real-time application space for decades. The new C++11standard includes native, language-level support for concurrency, a required feature for any nontrivial event-oriented real-time software. Threads, Locks, and Atomics now exist to provide the necessary tools to build the structures that make up the foundation of a complex real-time system. The National Spherical Torus Experiment Upgrade (NSTX-U) at the Princeton Plasma Physics Laboratory (PPPL) is breaking new ground with the language as applied to the needs of fusion devices. A new Digital Coil Protection System (DCPS) will serve as the main protection mechanism for the magnetic coils, and it is written entirely in C++11 running on Concurrent Computer Corporation's real-time operating system, RedHawk Linux. It runs over 600 algorithms in a 5 kHz control loop that determine whether or not to shut down operations before physical damage occurs. To accomplish this, NSTX-U engineers developed software tools that do not currently exist elsewhere, including real-time atomic synchronization, real-time containers, and a real-time logging framework. Together with a recent (and carefully configured) version of the GCC compiler, these tools enable data acquisition, processing, and output using a conventional operating system to meet a hard real-time deadline (that is, missing one periodic is a failure) of 200 microseconds.},

  doi          = {10.1109/TNS.2015.2448106},

  journal      = {IEEE Transactions on Nuclear Science},

  number       = 4,

  volume       = 62,

  place        = {United States},

  year         = {Fri Aug 14 00:00:00 EDT 2015},

  month        = {Fri Aug 14 00:00:00 EDT 2015}

}

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