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Performance of interconnection rip-up and reroute strategies

Published: 29 June 1981 Publication History

Abstract

Rip-up and reroute strategies can be applied following use of conventional wiring algorithms to calculate paths for residual connections failed by preceding techniques. The removal of blocking wire to allow new path runs inevitably introduces new (reroute) wiring requirements. In this paper we address the performance implications of various rates of success experienced while attempting reroutes. Using statistical approaches, we develop formulas which allow calculation of expected completion rate and computational effort for several types of rip-up and reroute algorithms. It is found that a basic router having modest completion rate behavior can be used to achieve surprisingly high completion rates, with rip-up strategies.

References

[1]
Agrawal, P., and Breuer, M. A., "Some Theoretical Aspects of Algorithmic Routing", Proceedings 14th Design Automation Conference, 1977, pp. 23-31.
[2]
Bollinger, H., "A Mature DA System for PC Layout", Proceedings International Printed Circuits Conference, 1979 pp. 85-99.
[3]
Dees, W. A., Jr., "Connectivity Optimization Utilizing Shove Aside and Rip-up Techniques", Master's Thesis, University of Texas at Austin, May, 1981.
[4]
Drake, A. W., Fundamentals of Applied Probability Theory, McGraw-Hill Book Company, New York, 1967.
[5]
Hashimoto, A. and Stevens, J., "Wire Routing by Optimizing Channel Assignment within Large Apertures", Proceeding 8th Design Automation Workshop, 1971, pp. 155-169.
[6]
Hightower, D. W., "A Solution to Line Routing Problems on the Continuous Plane", Proceedings 6th Design Automation Workshop, 1969, pp. 1-24.
[7]
Hightower, D. W., "The Interconnection Problem - A Tutorial", Proceedings 10th Design Automation Workshop, 1973, pp. 1-21.
[8]
Lee, C., "An Algorithm for Path Connections and Its Applications", IRE Transactions on Electronic Computers, September 1961, pp. 346-365.
[9]
Marvik, O. A., "An Interactive Routing Program with On-Line Clean-Up of Sketched Routes", Proceedings 16th Design Automation Conference, 1979, pp. 500-505.
[10]
Soukup, J., "Global Router", Proceedings 16th Design Automation Conference, 1979, pp. 481-484.
[11]
Wilson, D. C., and Smith, R. J.,II, "An Analytic Technique for Router Comparison", Proceedings 13th Design Automation Conference, 1976, pp. 251-258.

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cover image ACM Conferences
DAC '81: Proceedings of the 18th Design Automation Conference
June 1981
899 pages

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IEEE Press

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Published: 29 June 1981

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