Scheduling legacy multimedia applications

This work presents a legacy application-compatible, adaptation-oriented scheduling framework. The new scheduler is implemented as a Linux loadable module. Thus users can either use the original Linux scheduler or use our scheduler by loading the module. In the new scheduler, users can reserve a default execution rate for legacy multimedia applications, and a rate adjustment mechanism is provided for adaptation. The framework also supports rate-based execution (RBE) and periodic threads that run at a constant rate, and non-real-time threads that have no QoS demand.