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An efficient dynamic parallel approach to automatic test pattern generation

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3 Author(s)
Dahmen, H.-Ch. ; German Nat. Res. Center for Comput. Sci., St. Augustin, Germany ; Glaser, U. ; Vierhaus, H.T.

Automatic test pattern generation yielding high fault coverage for CMOS circuits has received a wide attention in industry and academic institutions for a long time. Since ATPG is an NP complete problem with complexity exponential to the number of circuit elements, the parallelization of ATPG is an attractive of research. In this paper we describe a parallel sequential ATPG approach which is either run on a standard network of UNIX workstations or, without any changing of the source code, on one of the most powerful high performance parallel computers, the IBM SP2. The test pattern generation is performed in three phases, two for easy-to-detect faults, using fault parallelism with an adaptive limit for the number of backtracks and a third phase for hard-to-detect faults, using search tree parallelism. The main advantage over existing approaches is a dynamic solution for partitioning the fault list and the search tree resulting in a very small overhead for communication without the need of any broadcasts and an optimal load balancing without idle times for the test pattern generators. Experimental results are shown in comparison with existing approaches and are promising with respect to small overhead and utilization of resources

Published in:

VLSI, 1997. Proceedings. Seventh Great Lakes Symposium on

Date of Conference:

13-15 Mar 1997

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