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Many embedded control systems comprise several control loops that are closed over a network of computation nodes. In such systems, complex timing behavior and communication lead to delay and jitter, which both degrade the performance of each control loop and must be considered during the controller synthesis. Also, the control performance should be taken into account during system scheduling. The contribution of this paper is a control-scheduling co-design method that integrates controller design with both static and priority-based scheduling of the tasks and messages, and in which the overall control performance is optimized.