Object-Reuse for More Predictable Real-Time Java Behavior

  • Authors:

  • Jameela Al-Jaroodi;Nader Mohamed

  • Affiliations:

  • Stevens Institute of Technology, Hoboken, NJ;Stevens Institute of Technology, Hoboken, NJ

  • Venue:
  • ISORC '05 Proceedings of the Eighth IEEE International Symposium on Object-Oriented Real-Time Distributed Computing
  • Year:
  • 2005

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Abstract

One of the problems with Java for real-time systems is the unpredictable behavior of garbage collection (GC). GC introduces unexpected load and causes undesirable delays for real-time applications. In this paper, we propose a technique that reduces and bounds the memory requirements for real-time Java programs. This technique can eliminate or reduce the need for GC and allows for a more predictable execution behavior and efficient utilization of the available memory. A theoretical model is presented and a number of benchmark tests are used to evaluate this technique in PERC, NewMonics' real-time JVM, and Sun's JVM. The results show that in some cases GC can be eliminated and an application's execution time decreases and becomes more predictable.