QoS in the Linux operating system

This document describes the implementation of our QoS
architecture, which has been developed in the context of our
UNIQuE project. In order to achieve an end-to-end quality of
service, our approach bases on feedback loops. Therefore, the
basis is an adaptive CPU scheduler, which is a key element in
our QoS architecture. We used the Linux Operating System
(version 2.3.49 as the QoS architecture requires
modifications in the kernel mechanisms and the sources of Linux
are available.