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Template Patterns for Improving Configurability and Scalability of Enterprise Distributed Real-time and Embedded System Testing and Experimentation

Testing and experimentation (T&E) is the process of executing many tests of a system using different configurations and scenarios. T&E is particularly important for enterprise distributed real-time and embedded (DRE) systems since its enables evaluation of quality-of-service (QoS) attributes, such as performance and reliability, throughout the software lifecycle. The heterogeneity of software and hardware, however, makes T&E of enterprise DRE systems hard, e.g., developers often use handcrafted T&E solutions that evaluate just a few of many different host, threading model, and workload configurations. Moreover, existing T&E techniques (such as handcrafted shell scripts) are tedious, time consuming, and labor intensive when trying to scale to address T&E concerns of enterprise DRE systems. This paper presents four related patterns for improving T&E scalability and flexibility by deferring realization of T&E configurations until as late as possible, e.g, based on the operating environment. We provide a synopsis, evaluation, and application for each pattern in the context of a representative enterprise DRE system. Our experience applying these patterns shows they can significantly improve the scope of T&E and evaluation of enterprise DRE system QoS.