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 - October 2024 edition
IT.CON x CYBERSECURITY DAY 2024, Saarbrücken
SPS Smart Production Solutions 2024
Real Time Linux Workshops
1999 - 2000 - 2001 - 2002 - 2003 - 2004 - 2005 - 2006 - 2007 - 2008 - 2009 - 2010
Tenth Real-Time Linux Workshop on October 29 to November 1st, 2008, in Guadalajara, Mexico
Interrupt Handling on x86 (RT) and Boot Interrupt Quirks
Alexander Graf, Olaf Dabrunz, Stefan Assmann
This paper details how the Linux kernel manages interrupts on the x86 platform and explains threaded interrupt handling, as used in the real-time Linux kernel. Threaded interrupt handling has been troubled by interactions with some hardware mechanisms since its introduction in real-time Linux. For that reason we describe mechanisms, sometimes called "boot interrupts",that route interrupts coming from seondary buses to the primary interrupt ontroller in the system, when the system is onsidered to use the legacy interrupt controller (PIC). These boot interrupts are responsible for unexpected interrupts on many systems that actually use non-legacy interrupt controllers (APICs) when interrupts are handled in threaded mode. Solutions on how to make boot interrupts disappear on many chipsets are presented.
