Accurate and Efficient Continuous Time and Discrete Events Simulation in SystemC
Breytner Fernández-Mesaa, Liliana Andradeb and Frédéric Pétrotc
Univ. Grenoble Alpes, CNRS, Grenoble INP Institute of Engineering Univ. Grenoble Alpes TIMA, 38000 Grenoble, France
abreytner.fernandez@univ-grenoble-alpes.fr
bliliana.andrade@univ-grenoble-alpes.fr
cfrederic.petrot@univ-grenoble-alpes.fr
ABSTRACT
The AMS extensions of SystemC emerged to aid the virtual prototyping of continuous time and discrete event heterogeneous systems. Although useful for a large set of use cases, synchronization of both domains through a fixed timestep generates inaccuracies that cannot be overcome without penalizing simulation speed. We propose a direct, optimistic, and causal synchronization algorithm on top of the SystemC kernel that explicitly handles the rich set of interactions that occur in the domain interface.We test our algorithm with a complex nonlinear automotive use case and show that it breaks the described accuracy and efficiency trade-off. Our work enlarges the applicability range of SystemC AMS based design frameworks.
