Implementation of the Hartstone Distributed Benchmark for hard real-time distributed systems: results and conclusions

This paper presents a first time approach for the implementation of the Hartstone Distributed Benchmark (HDB) for hard real-time distributed systems. From the series of experiments, as defined in the original HDB paper, six experiments have been implemented. The main idea behind the HDB is the definition of a number of (host processor) tasks on each node which exchange messages with corresponding tasks on the other nodes. The stopping criteria for each experiment is the missing of a message before the deadline of a receiving task. The variables in the HDB experiments are: the number of tasks sending and/or receiving messages; the number of messages sent and/or received per task period; the length of messages sent and/or received per task period; and the number of nodes participating in the experiments. The results of the implemented experiments show a high level of repeatability, and stability of the testbed setting used.