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Garbage collection in a large LISP system
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Source Conference on LISP and Functional Programming archive
Proceedings of the 1984 ACM Symposium on LISP and functional programming table of contents
Austin, Texas, United States
Pages: 235 - 246  
Year of Publication: 1984
ISBN:0-89791-142-3
Author
Sponsors
SIGACT: ACM Special Interest Group on Algorithms and Computation Theory
SIGART: ACM Special Interest Group on Artificial Intelligence
SIGPLAN: ACM Special Interest Group on Programming Languages
Publisher
ACM  New York, NY, USA
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Downloads (6 Weeks): 17,   Downloads (12 Months): 73,   Citation Count: 90
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ABSTRACT

This paper discusses garbage collection techniques used in a high-performance Lisp implementation with a large virtual memory, the Symbolics 3600. Particular attention is paid to practical issues and experience. In a large system problems of scale appear and the most straightforward garbage-collection techniques do not work well. Many of these problems involve the interaction of the garbage collector with demand-paged virtual memory. Some of the solutions adopted in the 3600 are presented, including incremental copying garbage collection, approximately depth-first copying, ephemeral objects, tagged architecture, and hardware assists. We discuss techniques for improving the efficiency of garbage collection by recognizing that objects in the Lisp world have a variety of lifetimes. The importance of designing the architecture and the hardware to facilitate garbage collection is stressed.



CITED BY  90