[$] The hierarchical constant bandwidth server scheduler

The POSIXrealtime model, which is implemented in the Linux kernel, can ensurethat a realtime process obtains the CPU time it needs to get its job done.It can be less effective, though, when there are multiple realtimeprocesses competing for the available CPU resources. The hierarchicalconstant bandwidth server patch series, posted by Yuri Andriaccio withwork by Luca Abeni, Alessio Balsini, and Andrea Parri, is a modification tothe Linux scheduler intended to make it possible to configure systems withmultiple realtime tasks in a deterministic and correct manner.