Parallelization, Distribution and Scaling of Multi-Simulations on Multi-Core Clusters, with DACCOSIM Environment

Scientific and Technical ReportDACCOSIM is a multi-simulation environment for continuous time systems , relying on FMI-CS standard and making easy the design of a multi-simulation graph. Moreover, DACCOSIM has been specially developed to run on multi-core PC clusters, in order to achieve speedup and size up on large scale multi-simulations. However, the distribution of the multi-simulation graph remains complex and is still under responsibility of the simulation developer. This paper introduces DACCOSIM parallel and distributed architecture, and our strategies to achieve efficient distribution of multi-simulation graph on multi-core clusters. Some performance experiments on two clusters, running up to 81 active components (FMU) and using up to 16 multi-core computing nodes, are shown. Performances measured on our faster cluster exhibit a good scalability, but some limitations of current DACCOSIM implementation are discussed