Dates and Events: |
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 |
COOL - Compact OSADL Online Lectures - November 2024 edition
OSADL talks at ESE Embedded Software Engineering Kongress
Real Time Linux Workshops
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13th Real-Time Linux Workshop from October 20 to 22 at the Faculty of Electrical Engineering, Czech Technical University in Prague
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Challenges and Benefits in integrating RT patch in PowerPC based Media System
Manikandan Ramachandran, Infosys Limited
Aviral Pandey
Media systems generally have many CPU intensive as well as time critical processes. Vanilla Linux 2.6 with preemption enabled does provide solution to these kind of system. However, if the system is interrupt intensive, as ours, then vanilla Linux 2.6 performance is not expected to be good; as by definition interrupt preempts all higher priority tasks.
RT patch seems to address exact issue by providing an option to handle interrupts in process context, but the solution doesn't seem to fit customized Linux. Quite a bit of architecture changes had to be made to reap the benefits of RT patch.
This paper describes about various challenges faced in integrating Ingo's RT patch on a customized PowerPC Linux package. And explains how those challenges were overcome. It describes how LTTng can be used to identify the bottlenecks and finally concludes by comparing performance of the application that were ran on vanilla and RT Linux.
