9 lines
1.8 KiB
TeX
9 lines
1.8 KiB
TeX
% English abstract
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\begin{abstract}
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The present work evaluates the feasibility and added value of an InfiniBand based communication in the co-simulation framework VILLASframework and its simulation data gateway VILLASnode. InfiniBand is characterized by its high throughput and low latencies, which makes it particularly suitable for the hard real-time requirements of VILLASnode. It allows applications on different host systems to communicate with each other, without many of the latency bottlenecks that are present in other technologies such as Ethernet.
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The present work shows that---with some optimizations---sub-microsecond latencies were achievable in a benchmark that mimics the characteristics of the co-simulation framework. After it presents how InfiniBand was integrated in the framework, thereby only making minor adjustments to the existing communication \acrshort{api}, it shows how the newly implemented interface performs compared to the existing ones.
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The results showed that, regarding latency, the InfiniBand interface performed more than one order of magnitude better than VILLASnode's other interfaces that enable server-server communication. Furthermore, much higher transmission rates could be achieved and the latency's predictability substantially improved. Its latencies, which lie between \SI{1.7}{\micro\second} and \SI{4.9}{\micro\second}, were only 1.5--\SI{2.5}{\micro\second} worse than the zero-latency reference, in which VILLASnode uses the \textit{\acrshort{posix} shared memory} \acrshort{api} to communicate. However, since the shared memory interface is only supported when the different VILLASnode instances are located on the same computer, the InfiniBand interface turned out to have the lowest latency of the currently implemented server-server interfaces.
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\end{abstract}
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