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Compensating for Interrupt Process Times in Real-Time Multimedia Systems

Summary: Compensating for Interrupt Process Times in Real-Time
Multimedia Systems
Luca Abeni and Giuseppe Lipari
ReTiS Lab, Scuola Superiore S. Anna,
Via dei Martiri 11, Pisa, Italy
{luca, lipari}@sssup.it
This paper describes an on-going work focused on using Adaptive Reservations to cope with unpre-
dictabilities due to the interrupt processing times in real-time kernels. Using this approach, the execution
time stolen by interrupt processing is modeled as a variation in the application execution times, and an
adaptive scheduling mechanism automatically compensates its effects.
1 Introduction
In the last years, there has been a growth of interest
in running applications with real-time requirements
(such as streaming applications, software mixers, and
so on) on top of desktop Operating Systems (OSs).
For this reason, a lot of effort has been spent in pro-
viding open source OSs such as Linux with real-time
One of the biggest problems that have to be ad-


Source: Abeni, Luca - Dipartimento di Ingegneria e Scienza dell'Informazione, UniversitÓ di Trento


Collections: Computer Technologies and Information Sciences