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OSADL Articles:
2023-11-12 12:00
Open Source License Obligations Checklists even better now
Import the checklists to other tools, create context diffs and merged lists
2022-07-11 12:00
Call for participation in phase #4 of Open Source OPC UA open62541 support project
Letter of Intent fulfills wish list from recent survey
2022-01-13 12:00
Phase #3 of OSADL project on OPC UA PubSub over TSN successfully completed
Another important milestone on the way to interoperable Open Source real-time Ethernet has been reached
2021-02-09 12:00
Open Source OPC UA PubSub over TSN project phase #3 launched
Letter of Intent with call for participation is now available |
OSADL talks at ESE Embedded Software Engineering Kongress
COOL - Compact OSADL Online Lectures - December 2024 edition
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16th Real Time Linux Workshop, October 12 to 13, 2014 at the CCD Congress Center Dusseldorf collocated with LinuxCon Europe in Dusseldorf, Germany
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An implementation of a multiprocessor bandwidth reservation mechanism for groups of tasks
Andrea Parri, Scuola Superiore Sant'Anna, Pisa, Italy
Mauro Marinoni, Scuola Superiore Sant'Anna, Pisa, Italy
Juri Lelli. Scuola Superiore Sant'Anna, Pisa, Italy
Giuseppe Lipari, Scuola Superiore Sant'Anna, Pisa, Italy
Hierarchical scheduling is a promising methodology for designing and deploying real-time applications, since it enables component-based design and analysis. Such techniques are also helpful for providing temporal isolation and timing guarantees in open systems, and for enabling application-specific schedulers.
The Bounded-Delay Multipartition (BDM) interface was proposed by Lipari and Bini in "A framework for hierarchical scheduling on multiprocessors: from application requirements to run-time allocation" (2010) to allow the designer to balance between flexibility in resource allocation and the cost of resource overprovisioning necessary for meeting the the timing constraints.
In this paper, we present an implementation within the Linux kernel of a multiprocessor bandwidth reservation mechanism for control groups based on the BDM interface, and we report on an early experimental evaluation. Our work is based on SCHED_DEADLINE, a scheduling class in the Linux kernel that provides task-level resource reservation using the Constant Bandwidth Server. Our implementation extends Linux's current structures and interface by replacing the control groups throttling mechanism with an EDF-based reservation algorithm.
