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  1. Proceedings of the 2010 international symposium on Memory management (ISMM '10)
  2. Improved replication-based incremental garbage collection for embedded systems
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Tracing garbage collection on highly parallel platforms
CETS: compiler enforced temporal safety for C
Memory, an elusive abstraction
Collecting hollywood's garbage: avoiding space-leaks in composite events
The locality of concurrent write barriers
The economics of garbage collection
Concurrent, parallel, real-time garbage-collection
PHALANX: parallel checking of expressive heap assertions
Speculative parallelization using state separation and multiple value prediction
Efficient memory shadowing for 64-bit architectures
A graph theoretic approach to cache-conscious placement of data for direct mapped caches
Optimizations in a private nursery-based garbage collector
Improved replication-based incremental garbage collection for embedded systems
Parametric inference of memory requirements for garbage collected languages

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Improved replication-based incremental garbage collection for embedded systems

Content Provider ACM Digital Library
Author Iwasaki, Hideya Yuasa, Taiichi Ugawa, Tomoharu
Abstract We have developed an incremental compacting garbage collector for embedded Java systems. The collector divides the heap into equal sized pages and uses the segregated free lists for fast allocation. Collectors that have such a heap layout have a problem of fragmentation in allocating objects larger than the page size. We solve this problem by using the replication-based incremental compaction. The compactor evacuates all objects in one area, the evacuation area, of the heap, thereby creating a large chunk of free space. We developed an algorithm for choosing the evacuation area that effectively cures fragmentation. The compactor does not use any read-barriers. Instead, it uses a technique similar to the replication-based incremental copying collection. This needs forwarding pointers for all evacuated objects. Rather than introducing an extra field for each object, we use a hash table to store forwarding pointers. Evaluation of this garbage collector implemented in Sun's J2ME Java Virtual Machine showed that all the benchmarks used were able to run without memory starvation using the heap sizes of only 151%-286% of the maximum amount of live data plus 8 KB of the hash table. Experiments on a desktop computer, though it is not a platform for embedded systems, showed that the maximum pause time was shorter than 200 μs, which was comparable to that of our implementation of the snapshot-at-the-beginning collector without compaction. On an ARM processor, the runtime overhead was 1%-16% with 8.0% on average compared to the mark-sweep collector.
Starting Page 73
Ending Page 82
Page Count 10
File Format PDF
ISBN 9781450300544
DOI 10.1145/1806651.1806664
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2010-06-05
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Garbage collection Embedded systems Real-time garbage collection Compaction Fragmentation
Content Type Text
Resource Type Article
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