Processor capacity reserves: an abstraction for managing processor usage

We have briefly motivated and described processor capacity reserves and our prototype implementation of reserves in Real-Time Mach. The reservation mechanism provides a way for application programs to specify their reservation requests and incorporates a scheduling framework which supports an admission control policy. The reservation system accurately measures processor usage of individual threads, even when these threads invoke user-level servers to do work on their behalf, and the scheduler enforces reservations by relegating reserves to a time-sharing pool after their reservations have been consumed