AQuoSA (Adaptive Quality of Service Architecture) is an open architecture for the provisioning of adaptive Quality of Service functionality into the Linux kernel. The project features a flexible, portable, lightweight and open architecture for supporting QoS related services on the top of a general-purpose operating system as Linux. The architecture is well founded on formal scheduling analysis and control theoretical results.
A key feature of AQuoSA is the Resource Reservation layer that is capable of dynamically adapting the CPU allocation for QoS aware applications based on their run-time requirements. In order to provide such functionality, AQuoSA embeds a kernel-level CPU scheduler implementing a resource reservation mechanism for the CPU, which gives the ability to the Linux kernel to realize (partially) temporal isolation among the tasks running within the system.
AQuoSA is one of a few projects that provides real-time scheduling capabilities to unprivileged users on a multi-user system in a controlled way, by means of a properly designed access-control model.