A Garbage Collection Technique for Embedded Multithreaded Multicore Processors

Authors:
Sascha Uhrig;Theo Ungerer
Affiliations:
Institute of Computer Science, University of Augsburg, Augsburg, Germany 86159;Institute of Computer Science, University of Augsburg, Augsburg, Germany 86159
Venue:
ARCS '09 Proceedings of the 22nd International Conference on Architecture of Computing Systems
Year:
2009

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Abstract

Multicore processors get more and more popular, even in embedded systems. Due to the deeply integrated threading concept, Java is a perfect choice to deal with the necessary thread-level parallelism required for the performance potential of a multicore. Accordingly, the software developers are familiar with the threading concept, which means that single core applications already fit very well on a multicore processor and are able to utilize its advantage. Nevertheless, a drawback of Java has to be mentioned: the required garbage collection. Especially in multicore environments the most often used stop-the-world collectors reach their limits because all cores have to be suspended at the time a single thread requires a garbage collection cycle. Hence, the performance of the other cores is harmed tremendously. In this paper we present a garbage collection technique that runs in parallel to the application threads within a multithreaded multicore without any stop-the-world behavior.