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Concurrent garbage collection on stock hardware

  • S. C. North
  • J. H. Reppy
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 274)

Abstract

We have demonstrated a practical design for memory management in a concurrent system running on stack hardware. Under our modification of Brooks' forwarding pointers, the only runtime costs, owing to storage reclamation, incurred by user processes are an extra level of indirection when accessing object contents and the need to scavenge when updating mutable objects. Therefore, we believe that our system can successfully off-load much of the cost of memory management to, otherwise unused, dead-time.

Beyond Pegasus, this work has application to any system based on lightweight processes and heap allocation. We believe the ease with which the memory management system was implemented is a testimony to the soundness of Pegasus as a foundation for building programming environments.

Keywords

Object Reference Garbage Collection Memory Management User Process Garbage Collection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. [Barth77]
    Barth, J. “Shifting Garbage Collection Overhead to Compile Time,” Communications of the ACM, V. 20, Nr. 7, July 1977, pp. 513–518.Google Scholar
  2. [Baker78]
    Baker, H.G. “List Processing in Real Time on a Serial Computer,” Communications of the ACM, V. 21, Nr. 4, April 1978, pp. 280–294.Google Scholar
  3. [Ben-Ari84]
    Ben-Ari, M. “Algorithms for On-the-fly Garbage Collection,” ACM TOPLAS, V. 6, Nr. 3, July, 1984, pp. 333–344.Google Scholar
  4. [BS83]
    Ballard, S., Shirron, S. “The Design and Implementation of VAX/Smalltalk-80,” in Smalltalk-80: Bits of History, Words of Advice, G. Krasner, ed., Addison-Wesley, Reading, Mass., 1983, pp. 127–150.Google Scholar
  5. [Brooks84]
    Brooks, R.A. “Trading Data Space for Reduced Time and Code Space in Real Time Garbage Collection on Stock Hardware,” Conference Record of the 1984 ACM Symposium on LISP and Functional Programming, Aug. 6–8, 1984, pp. 256–262.Google Scholar
  6. [Cohen81]
    Cohen, J. “Garbage Collection of Linked Data Structures,” Computing Surveys, V. 13, Nr. 3, September 1981, pp. 340–367.Google Scholar
  7. [CG77]
    Clark, Douglas W., and Green, C. Cordell. “An Empirical Study of List Structure in Lisp,” Communications of the ACM, V. 20, Nr. 2, pp. 78–87.Google Scholar
  8. [Dawson82]
    Dawson, J.L. “Improved Effectiveness From a Real Time Lisp Garbage Collector,” Conference Record of the 1982 ACM Symposium on Lisp and Functional Programming, August 15–18, 1982, pp. 159–167.Google Scholar
  9. [DB76]
    Deutsch, L.P., Bobrow, D. “An Efficient, Incremental, Automatic Garbage Collector,” Communications of the ACM, V. 19, Nr. 9, September 1976, pp. 522–526.Google Scholar
  10. [DL78]
    Dijkstra, E.W., Lamport, L., et al. “On-the-Fly Garbage Collection: An Exercise in Cooperation,” Communications of the ACM, V. 21, Nr. 11, November 1978, pp. 966–975.Google Scholar
  11. [FY69]
    Fenichel, R., Yochelson, J. “A LISP Garbage Collector for Virtual Memory Computer Systems,” Communications of the ACM, V. 12, Nr. 11, November 1969, pp. 611–612.Google Scholar
  12. [Gabriel85]
    Gabriel, R.P. Performance and Evaluation of Lisp Systems, The MIT Press, Cambridge, Mass., 1985.Google Scholar
  13. [Goldberg83]
    Goldberg, A. Smalltalk-80: The Language and Its Implementation, Addison-Wesley, Reading, Mass., 1983.Google Scholar
  14. [JM81]
    Jones, N.D., Muchnik, S.S. “Flow Analysis and Optimization of LISP-like Structures,” in Program Flow Analysis: Theory and Applications, S.S. Muchnik and N.D. Jones, eds., Prentice-Hall, Englewood Cliffs, N.J., pp. 102–131.Google Scholar
  15. [LH83]
    Lieberman, H., Hewitt, C. “A Real-time Garbage Collector Based on the Lifetime of Objects,” Communications of the ACM, V. 26, Nr. 6, June 1983, pp. 419–429.Google Scholar
  16. [Milner85]
    Milner, R. “The Standard ML Core Language,” Polymorphism, V. 2, Nr. 2, October 1985.Google Scholar
  17. [MacQ85]
    MacQueen, D. “Modules for Standard ML,” Polymorphism, V. 2, Nr. 2, October 1985.Google Scholar
  18. [Moon84]
    Moon, D.A. “Garbage Collection in a Large Lisp System,” Conference Record of the 1984 ACM Symposium on Lisp and Functional Programming, August 6–8, 1984, pp. 235–246.Google Scholar
  19. [Motorola85]
    Motorola Inc. MC68020 32-bit Microprocessor User's Manual, 2nd Ed., Prentice-Hall, Englewood Cliffs, N.J., 1985.Google Scholar
  20. [Rovner85]
    Rovner, P. “On Adding Garbage Collection and Runtime Types to a Strongly-Typed, Statically-Checked, Concurrent Language,” Xerox PARC Report CSL-84-7, July 1985.Google Scholar
  21. [RG86]
    Reppy, J.H., Gansner, E.R. “Pegasus: A Foundation for Programming Environments,” AT&T Bell Laboratories Technical Memorandum, December 1986. An earlier version of this appeared in the Proceedings of the Second ACM SIGSOFT/SIGPLAN Symposium on Practical Software Development Environments, December 9–11, 1986, pp. 218–227.Google Scholar
  22. [Steele77]
    Steele, G.L. Jr., “Data Representations in PDP-10 MacLISP,” Proceedings of the 1977 MACSYMA Users' Conference, NASA, Washington, D.C., July 1977, pp. 203–214.Google Scholar
  23. [Stoyan84]
    Stoyan, H. “Early LISP History (1956–1959),” Conference Record of the 1984 ACM Symposium on Lisp and Functional Programming, August 6–8, 1984, pp. 229–310.Google Scholar
  24. [Ungar84]
    Ungar, D. “Generation Scavenging: A Non-disruptive High Performance Storage Reclamation Algorithm,” Proceedings of the ACM SIGSOFT/SIGPLAN Software Engineering Symposium on Practical Software Development Environments, April 23–25, 1984, pp. 157–167.Google Scholar
  25. [Vo86]
    Vo, K.P. AT&T Bell Laboratoires, Murray Hill, N.J. Unix memory allocator, personal communication.Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • S. C. North
    • 1
  • J. H. Reppy
    • 1
  1. 1.AT&T Bell LaboratoriesMurray Hill

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