Hierarchical scheduling and allocation of multirate systems on heterogeneous multiprocessors

This paper describes new algorithms for system-level software synthesis, namely the scheduling and allocation of a set of complex tasks running at multiple rates on a heterogeneous multiprocessor. The tasks may have precedence constraints within them. The multiprocessor may be composed of both programmable and fixed-function processing elements and may have arbitrary interconnect topology. Our hierarchical algorithm takes advantage of the hierarchical structure of the system's task graph to hierarchically allocate and schedule processes on the multiprocessor to meet the hard real-time constraints on the tasks. Multimedia is an important application of our algorithm.