NDLI: Token Coherence: decoupling performance and correctness

Content Provider	IEEE Xplore Digital Library
Author	Martin, M.M.K. Hill, M.D. Wood, D.A.
Copyright Year	2003
Description	Author affiliation: Dept. of Comput. Sci., Wisconsin Univ., Madison, WI, USA (Martin, M.M.K.; Hill, M.D.; Wood, D.A.)
Abstract	Many future shared memory multiprocessor servers will both target commercial workloads and use highly integrated "glueless" designs. Implementing low latency cache coherence in these systems is difficult, because traditional approaches either add indirection for common cache to cache misses (directory protocols) or require a totally ordered interconnect (traditional snooping protocols). Unfortunately, totally ordered interconnects are difficult to implement in glueless designs. An ideal coherence protocol would avoid indirections and interconnect ordering; however, such an approach introduces numerous protocol races that are difficult to resolve. We propose a new coherence framework to enable such protocols by separating performance from correctness. A performance protocol can optimize for the common case (i.e., absence of races) and rely on the underlying correctness substrate to resolve races, provide safety, and prevent starvation. We call the combination Token Coherence, since it explicitly exchanges and counts tokens to control coherence permissions. We develop TokenB, a specific Token Coherence performance protocol that allows a glueless multiprocessor to both exploit a low latency unordered interconnect (like directory protocols) and avoid indirection (like snooping protocols). Simulations using commercial workloads show that our new protocol can significantly outperform traditional snooping and directory protocols.
Sponsorship	IEEE Comput. Soc. Tech. Committee on Comput. Archit. ACM
Starting Page	182
Ending Page	193
File Size	431951
Page Count	12
File Format	PDF
ISBN	0769519458
ISSN	10636897
DOI	10.1109/ISCA.2003.1206999
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-06-09
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Broadcasting Costs File servers Space technology Delay Access protocols Bandwidth Logic Safety
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

Token tenure: PATCHing token counting using directory-based cache coherence

Token coherence: decoupling performance and correctness

Switch-Based Packing Technique for Improving Token Coherence Scalability

Enhancing the Performance of NFSv4 with RDMA

Token coherence: a new framework for shared-memory multiprocessors

A key distribution and rekeying framework with totally ordered multicast protocols

RegionScout: exploiting coarse grain sharing in snoop-based coherence

Deploying Digital Media Libraries in Multi-Service Access Networks

Performance analysis of an adaptive token bus protocol

Token Coherence: decoupling performance and correctness

Similar Documents

Token tenure: PATCHing token counting using directory-based cache coherence

Token coherence: decoupling performance and correctness

Switch-Based Packing Technique for Improving Token Coherence Scalability

Enhancing the Performance of NFSv4 with RDMA

Token coherence: a new framework for shared-memory multiprocessors

A key distribution and rekeying framework with totally ordered multicast protocols

RegionScout: exploiting coarse grain sharing in snoop-based coherence

Deploying Digital Media Libraries in Multi-Service Access Networks

Performance analysis of an adaptive token bus protocol

Token Coherence: decoupling performance and correctness