EROS: A fast capability system

Jonathan S. Shapiro, Jonathan M. Smith, David J. Farber

Research output: Chapter in Book/Report/Conference proceedingConference contribution

54 Citations (Scopus)


EROS is a capability-based operating system for commodity processors which uses a single level storage model. The single level store's persistence is transparent to applications. The performance consequences of support for transparent persistence and capability-based architectures are generally believed to be negative. Surprisingly, the basic operations of EROS (such as IPC) are generally comparable in cost to similar operations in conventional systems. This is demonstrated with a set of microbenchmark measurements of semantically similar operations in Linux. The EROS system achieves its performance by coupling well-chosen abstract objects with caching techniques for those objects. The objects (processes, nodes, and pages) are well-supported by conventional hardware, reducing the overhead of capabilities. Software-managed caching techniques for these objects reduce the cost of persistence. The resulting performance suggests that composing protected subsystems may be less costly than commonly believed.

Original languageEnglish
Title of host publicationProceedings of the 17th ACM Symposium on Operating Systems Principles, SOSP 1999
PublisherAssociation for Computing Machinery, Inc
Number of pages16
ISBN (Electronic)1581131402, 9781581131406
Publication statusPublished - 1999 Dec 12
Externally publishedYes
Event17th ACM Symposium on Operating Systems Principles, SOSP 1999 - Charleston, United States
Duration: 1999 Dec 121999 Dec 15

Publication series

NameProceedings of the 17th ACM Symposium on Operating Systems Principles, SOSP 1999


Conference17th ACM Symposium on Operating Systems Principles, SOSP 1999
Country/TerritoryUnited States

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Software
  • Computer Science Applications


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