Enabling deadline scheduling for Java real-time computing

We present a scheduling architecture that enables the implementation of deadline based scheduling policies. The architecture is used to give real time capabilities to a custom Java virtual machine. This framework retains a clear separation between generic kernel mechanisms and upper level scheduling classes. A pure earliest deadline first algorithm can be implemented, but enhanced policies such as D^over or Robust EDF are also supported. We present our architecture, its implementation in the ChorusOS microkernel and its use by the Java virtual machine