ABSTRACT
ICALEPCS 2001

Abstracts



WEBT003 (Talk)

Presenter: Jun-ichi Odagiri (High Energy Accelerator Research Organization, KEK)
email: jun-ichi.odagiri@kek.jp
Review Status: Proceedings Ready - 04/05/02
FullText: pdf
Transparencies: pdf

L4-Linux Based System as a Platform for EPICS iocCore

J. Odagiri, N. Yamamoto and T. Katoh

The EPICS Input / Output Controller (IOC) core-program, iocCore [1], is now portable to multi-platforms. The Linux operating system, among them, seems to be a promising candidate for a platform to run iocCore, considering the recent high appreciation in desktop and server use as well as control fields. The Linux kernel, however, is not suitable for time-critical applications since it responds to external events with unpredictable latency. We summarize known causes of the latency, and then discuss some of the different solutions for the problem in view of availability to iocCore. As a possible alternative, we propose an approach that dispatches user level processes by a real-time kernel aiming at consistency of availability with predictable responsiveness.
[1] http://www.aps.anl.gov/epics/
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ICALEPCS 2001

Last updated: September 13, 2002

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