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