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Scheduling Hard Real-Time Garbage Collection

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4 Author(s)
Kalibera, T. ; Purdue Univ., West Lafayette, IN, USA ; Pizlo, F. ; Hosking, A.L. ; Vitek, J.

Managed languages such as Java and C# are increasingly being considered for hard real-time applications because of their productivity and software engineering advantages. Automatic memory management, or garbage collection, is a key enabler for robust, reusable libraries, yet remains a challenge for analysis and implementation of real-time execution environments. This paper comprehensively compares the two leading approaches to hard real-time garbage collection. While there are many design decisions involved in selecting a real-time garbage collection algorithm, for time-based garbage collectors researchers and practitioners remain undecided as to whether to choose periodic scheduling or slack-based scheduling. A significant impediment to valid experimental comparison is that the commercial implementations use completely different proprietary infrastructures. Here, we present Minuteman, a framework for experimenting with real-time collection algorithms in the context of a high-performance execution environment for real-time Java. We provide the first comparison of the two approaches, both experimentally using realistic workloads, and analytically in terms of schedulability.

Published in:

Real-Time Systems Symposium, 2009, RTSS 2009. 30th IEEE

Date of Conference:

1-4 Dec. 2009

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