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Garbage Collection in an Embedded Java Virtual Machine
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- Authors
- Chang-Il Cha, Hyung-Jun Kim, Kyu-Jeong Hwang, Sang-Wook Kim, Sang-Yun Lee, Hee-Sun Won
- Issue Date
- 2006-10
- Citation
- International Conference on Knowledge-Based and Intelligent Information and Engineering Systems (KES) 2006 (LNCS 4251), v.4251, pp.443-450
- Language
- English
- Type
- Conference Paper
- Abstract
- Garbage collection in the Java virtual machine is a core component that relieves application programmers of difficulties related to memory man-agement. It should also take into account the characteristics of embedded envi-ronments. In this paper, we propose a garbage collector that meets the require-ments for embedded environments. The proposed garbage collector is primarily based on generational garbage collection where a heap is composed of young and old generations. A semi-space copying collector is employed for a young generation, and an incremental copying collector is employed for an old genera-tion. Owing to its contiguous allocations, the proposed method provides fast al-locations and the locality of references. By adjusting the size of a young genera-tion, the block size, and the number of blocks in a frame, it is able to control the delay time caused by garbage collection, and thus guarantee the real time con-straints. Also, it employs a novel write barrier mechanism for efficiently deter-mining reachable objects in a specific frame. With all these characteristics to-gether, the proposed garbage collector can reclaim all the garbage objects precisely as well as timely. To reveal its superiority, we perform a series of ex-periments. © Springer-Verlag Berlin Heidelberg 2006.