NDLI: TO-Lock: removing lock overhead using the owners' temporal locality

Content Provider	IEEE Xplore Digital Library
Author	Ogasawara, T. Komatsu, H. Nakatani, T.
Copyright Year	2004
Description	Author affiliation: Tokyo Res. Lab., IBM Japan Ltd., Tokyo, Japan (Ogasawara, T.; Komatsu, H.; Nakatani, T.)
Abstract	The performance of locking is critical, as programming languages with built-in thread support are coming into wide use. Many techniques for optimizing Java monitors have been proposed, based on the observation that the locks are rarely contended for in many applications. However, the problem of the performance degradation in SMP environments caused by necessary serializations of the processors' execution has not been addressed for shared objects. We propose a new algorithm for this problem. It uses simple instructions to acquire the lock by exploiting the owner locality for objects even if the ownership has migrated among the threads. Our algorithm is particularly effective for SMP environments because we can remove the overhead of the serialization caused by complex atomic operations for uncontended locks by allowing the lock operation and the code protected by the lock to be executed in parallel. We verified the safety of the algorithm by using a software tool, Spin. The experimental results of our benchmarking on an SMP machine using Intel Xeon processors showed that our algorithm can significantly improve the performance by 83% on average compared to the case using a complex atomic instruction.
Sponsorship	IEEE TCCP IEEE TCCA ACM SIGARCH IFIP WG 10.3 Conseil Regional PACA Conseil General des Alpes Maritimes IBM IBM France Intel Microsoft Sun France
Starting Page	255
Ending Page	266
File Size	387985
Page Count	12
File Format	PDF
ISBN	0769522297
ISSN	1089795X
DOI	10.1109/PACT.2004.1342559
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-10-03
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Yarn Java Laboratories Computer languages Degradation Protection Software safety Software algorithms Software tools Programming profession
Content Type	Text
Resource Type	Article
Subject	Theoretical Computer Science Hardware and Architecture Software

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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