NDLI: Routing congestion estimation with real design constraints

Content Provider	IEEE Xplore Digital Library
Author	Wen-Hao Liu Yaoguang Wei Sze, C. Alpert, C.J. Zhuo Li Yih-Lang Li Viswanathan, N.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of Minnesota, Minneapolis, MN, USA (Yaoguang Wei) \|\| Dept. of Comput. Sci., Nat. Chiao-Tung Univ., Hsinchu, Taiwan (Wen-Hao Liu; Zhuo Li; Yih-Lang Li) \|\| Austin Res. Lab., IBM, Austin, TX, USA (Sze, C.; Alpert, C.J.; Viswanathan, N.)
Abstract	To address the routability issue, routing congestion estimators (RCE) become essential in industrial design flow. Recently, several RCEs [1-4] based on global routing engines are developed, but they typically ignore the effects of routing on timing so that the identified routing paths may be overlong and thus impractical. To be aware of the timing issues, our proposed global-routing-based RCE obeys the layer directive and scenic constraints to respectively limit the routing layers and the maximum routing wirelength of the potentially timing-critical nets. To handle the scenic constrains, we propose a novel method based on a relaxation-legalization scheme. Also, because the work in [5] reveals that congestion ratio is a better indicator than overflow to evaluate routability, this work focuses on minimizing the congestion ratio rather than overflows. As will be shown, the problem of minimizing congestion ratio is more complicated than minimizing overflows, so we develop a new rip-up and rerouting scheme to reduce congestion and further to approach a target congestion ratio. Moreover, to fit the demands of practical uses, this work presents a control utility to trade off runtime and quality, which is an essential function to an industrial RCE tool. Experiments reveal that the proposed RCE is faster and more accurate than another industrial global-routing-based RCE.
Starting Page	1
Ending Page	8
File Size	1961692
Page Count	8
File Format	PDF
ISBN	9781450320719
ISSN	0738100X
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Association for Computing Machinery, Inc. (ACM)
Subject Keyword	Routing Runtime Timing Estimation Throughput Generators routability Congestion estimation global routing
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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