| Directory > Computers > Software > Operating Systems > Single Address Space The Grand Unified Theory of Address Spaces
One of many reports available on a list of publications from Grasshopper OS. Scroll down to
mid-page. Explains rationale and design approach for SASOSs. Abstracts, FTP downloads in formats:
PDF, PS, PS.GZ.
http://os.dcs.st-and.ac.uk/GH/Papers/Papers.html
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Grasshopper
Orthogonally persistent, research SASOS. Persistence gives a fundamentally different model of
computing from that supported by normal OSs, so using such for persistence research is
inappropriate.
http://os.dcs.st-and.ac.uk/GH/Grasshopper.html
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Vapour
OS based on single address space, persistent store: no kernel, processes, filesystem. Allows varied
multitasking systems, including preemptive; and multiple users. Security via preventing interface
violation, includes undefined behavior; language level security model. [Open Source]
http://vapour.sourceforge.net/
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Torsion
Multitasking SASOS with transparent data persistence: users and application programmers need not
know or care that system memory is transient and must be written to disk to persist across reboots,
all details done by OS, so once data is made, it exists until explicitly destroyed, like physical
objects. [Open Source, GPL]
http://www.torsion.org/
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The Expected Lifetime of Single Address Space Operating Systems
Where stale pointers make it hard to re-use addresses, some have claimed that a 64-bit address
space is so big that there is no need to ever re-use addresses. Results of extensive kernel-level
tracing of department workstations.
http://www.cs.dartmouth.edu/~dfk/papers/kotz:addrtrace.pdf
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Single Address Space Operating Systems Archive, Dartmouth
Mail lists, projects, biographies (BibTeX, HTML long, HTML sans abstracts), a few links to other
SASOS sites.
http://www.cs.dartmouth.edu/~dfk/sasos/
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Mungi
Orthogonally persistent, capability-based secure SASOS using L4 2nd generation microkernel. Goals:
Prove SASOSs can run on normal hardware, be as secure as normal OSs; can be as efficient as, and
are faster than, normal OSs in some important uses; can be pure SASOSs with all data (even system
data) in one address space and no other IPC mechanism is supported by OS. POSIX emulating. [Open
Source, GPL]
http://www.cse.unsw.edu.au/~disy/Mungi/
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ResearchIndex: Architectural Support for Single Address Space Operating Systems
From Proceedings of the International Conference on Architectural Support for Programming Languages
and Operating Systems, Boston, USA, October 1992.
http://citeseer.nj.nec.com/chase92architectural.html
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Bibliography of Single Address Space OSs and Related Articles
Part of Computer Science Bibliography Collection of Alf-Christian Achilles.
http://liinwww.ira.uka.de/bibliography/Os/sasos.html
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SASOS and Sombrero Project
SASOS research, and the Sombrero OS, at Arizona State University.
http://www.eas.asu.edu/~sasos/
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Single Address Space Operating Systems
Short, annotated, alphabetically sorted list and links, part of larger system.
http://www.cs.arizona.edu/people/bridges/os/sasp.html
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Opal
Exploring a new OS structure, tuned to the needs of complex applications (eg, CAD/CAM) where a
number of cooperating programs manipulate a large shared persistent database of objects.
http://www.cs.washington.edu/homes/levy/opal/opal.html
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