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Parallel Transient Simulation of Multiphysics Circuits Using Delay-Based Partitioning

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7 Author(s)
Shivam Priyadarshi ; Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, NC, USA ; Christopher S. Saunders ; Nikhil M. Kriplani ; Harun Demircioglu
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A parallel transient simulation technique for multiphysics circuits is presented. The technique develops partitions utilizing the inherent delay present within a circuit and between physical domains. A state-variable-based circuit delay element is presented, which implements the coupling between two spatially or temporally isolated circuit partitions. A parallel delay-based iterative approach for interfacing delay-partitioned subcircuits is applied, which achieves the reasonable accuracy of nonparallel circuit simulation if both incorporate the same interblock delay. The partitioned subcircuits are distributed to different cores of a shared-memory multicore processor and solved in parallel. A multithreaded implementation of the methodology using OpenMP is presented. Examples showing superlinear speedup compared to unpartitioned single-core simulation using the direct method are presented. This paper also discusses the impact of load balancing and absolute delay on simulation speedup.

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IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems  (Volume:31 ,  Issue: 10 )