The Resource Kernel (RK) is an OS-independent kernel abstraction that provides guaranteed, timely and enforced access to system resources including CPU cycles, disk bandwidth and network bandwidth. RK, developed and distributed by the Real-Time and Multimedia Systems Laboratory at Carnegie Mellon University, has been incorporated into the Linux kernel to create a real-time version of the Linux kernel… called Linux/RK. This paper will describe the recent enhancements to Linux/RK and discuss several performance evaluations, application porting experience, QoS guarantees and tools support. Future challenges in terms of end-to-end reservations and shared memory multiprocessors will also be discussed.

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