TY - GEN
T1 - Supporting Multiprocessors in the Icecap Safety-Critical Java Run-Time Environment
AU - Zhao, Shuai
AU - Wellings, Andy
AU - Korsholm, Stephan Erb
PY - 2015
Y1 - 2015
N2 - 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.
AB - 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.
U2 - 10.1145/2822304.2822305
DO - 10.1145/2822304.2822305
M3 - Conference contribution
T3 - ACM International Conference Proceeding Series
BT - JTRES '15
PB - ACM
ER -