NDLI: Group contexts: an architectural approach to virtual sharing

Content Provider	IEEE Xplore Digital Library
Author	Mohamed, A. Sagahyroon, A.
Copyright Year	1997
Description	Author affiliation: Sun Microsyst., USA (Mohamed, A.)
Abstract	Software managed translation look-aside buffers (TLBs) provide fine grain address translations at a virtual page. The paper presents a novel scheme that exploits the aforementioned property to allow a group of processes to share system resources of write-protected memory segments. These resources consist of segment and address mapping data structures, and software translation cache and translation look-aside buffer entries. While this feature reduces allocation of kernel memory, it also better utilizes address translation caches by coalescing multiple entries into a single entry. The idea of virtual sharing is complicated by two issues. First, the virtual memory sub-system may not map shareable segments at the same virtual addresses and access permissions for all participants. The authors present a simple and flexible VM policy which enforces this requirement in the presence of dynamic linking and permission changes. Second, the underlying hardware address translation architecture may not explicitly support group sharing. They propose a group context TLB architecture which allows the system to share TLB entries of virtually shared pages. They also present a judicious software multiplexing mechanism that enables the operating system to share software address translation mappings independent of the underlying hardware characteristics.
Starting Page	289
Ending Page	293
File Size	630491
Page Count	5
File Format	PDF
ISBN	0780339053
DOI	10.1109/PACRIM.1997.619957
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-08-20
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Hardware Operating systems Computer architecture Data structures Kernel Permission Virtual manufacturing Memory management Sun Protection
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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