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An adaptive technique for dynamic rollback in concurrent event-driven fault simulation

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2 Author(s)
Farinetti, L. ; Dip. di Autom. e Inf., Politecnico di Torino, Italy ; Montessoro, P.L.

Both simulation for design verification and fault simulation in conjunction with automatic test pattern generation could take advantage of the possibility of moving the simulation time forward and backward. Up until now, rollback was allowed only by explicit backup/restore commands issued by the user. The paper presents a technique that makes possibles a “run for T” command, where T can be any time value, either positive or negative. It is based on an adaptive mechanism that automatically controls the parameters of an advanced network status recording system. A major feature is that the user may decide the maximum allowable overhead. Experiments show that the resulting rollback time is on the average very short, and therefore this technique can be efficiently used to improve sequential ATPG algorithms

Published in:

Computer Design: VLSI in Computers and Processors, 1993. ICCD '93. Proceedings., 1993 IEEE International Conference on

Date of Conference:

3-6 Oct 1993

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