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We present a user-controllable, general-purpose, pseudorandom task graph generator called Task Graphs For Free (TGFF). TGFF creates problem instances for use in allocation and scheduling research. It has the ability to generate independent tasks as well as task sets which are composed of partially ordered task graphs. A complete description of a scheduling problem instance is created, including attributes for processors, communication resources, tasks, and inter-task communication. The user may parametrically control the correlations between attributes. Sharing TGFF's parameter settings allows researchers to easily reproduce the examples used by others, regardless of the platform on which TGFF is run.
Dick et al. (2002) studied this question.