ARTS: a distributed real-time kernel

Hideyuki Tokuda, Clifford W. Mercer

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)


ARTS is a distributed real-time operating system designed for a real-time systems testbed being developed at Camegie Mellon University. The objective of the testbed is to develop and verify advanced real-time computing technologies for a distributed environment. The testbed consists of a set of SUN3 workstations connected by a real-time network based on IEEE 802.5 Token Ring and Ethernet. The goal of the ARTS Kernel is not to produce simply a fast real-time executive, but rather to provide users with a predictable, analyzable, and reliable distributed real-time computing environment. In particular, we have developed a real-time object model which is incorporated with a time fence protocol. The time fence protocol is used at every invocation in the object to detect the origin of timing errors. We also developed an integrated time-driven scheduling model and its scheduler based on the notion of policy/mechanism separation. Since each scheduling policy is implemented as a kernel object, a user can easily add policies or change the system's scheduling policy. A real-time toolset was also developed in order to predict the schedulability of the real-time activities.

Original languageEnglish
Pages (from-to)29-53
Number of pages25
JournalOperating Systems Review (ACM)
Issue number3
Publication statusPublished - 1989 Jul 1

ASJC Scopus subject areas

  • Information Systems
  • Hardware and Architecture
  • Computer Networks and Communications


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