Supporting Multiprocessors in the Icecap Safety-Critical Java Run-Time Environment

Shuai Zhao, Andy Wellings, Stephan Erbs Korsholm

    Research output: Contribution to conference without a publisher/journalPaperResearchpeer-review

    Abstract

    The current version of the Safety Critical Java (SCJ) specification defines three compliance levels. Level 0 targets single processor programs while Level 1 and 2 can support multiprocessor platforms. Level 1 programs must be fully partitioned but Level 2 programs can also be more globally scheduled. As of yet, there is no official Reference Implementation for SCJ. However, the icecap project has produced a Safety-Critical Java Run-time Environment based on the Hardware-near Virtual Machine (HVM). This supports SCJ at all compliance levels and provides an implementation of the safety-critical Java (javax.safetycritical) package. This is still work-in-progress and lacks certain key features. Among these is the ability to support multiprocessor platforms. In this paper, we explore two possible options to adding multiprocessor support to this environment: the “green thread” and the “native thread” approaches. The “native thread” approach is adopted and the design and implementation of a revised icecap SCJ run-time environment is discussed.
    Original languageEnglish
    Publication dateOct 2015
    Number of pages10
    Publication statusPublished - Oct 2015
    Eventjtres 2015 - Paris, France
    Duration: 7 Oct 20158 Oct 2015

    Conference

    Conferencejtres 2015
    Country/TerritoryFrance
    CityParis
    Period07/10/1508/10/15

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