LIGO Document G1101141-v1

NEW CONTROL AND DATA ACQUISITION SYSTEM IN THE ADVANCED LIGOPROJECT

Document #:
LIGO-G1101141-v1
Document type:
G - Presentations (eg Graphics)
Other Versions:
Abstract:
A new control and data acquisition system architecture is being implemented as part of the Advanced Laser Interferometer Gravitational-wave Observatory (aLIGO) project. This system employs a number of multi-core processor-based computers to perform real-time control, with connection to PCI Express Input/Outputdevices via fiber optic links. Requirements on the real-time control algorithms include servo loop rates of up to 65KHz and synchronous, deterministic operation to within a few microseconds. To attain this real-time performance, a patch has been developed to the Linux operating system that allows detachment of a processor core from the Linux scheduler for the exclusive use of an assigned real-time task. An overview of the real-time software design, which takes advantage of this "core locking", and the particulars of the Linux patch are described in this paper.
Files in Document:
  • PDF format (G1101141-v1_ICALEPSC_Poster.pdf, 1.3 MB)
Author Groups:
Keywords:
DAQ RCG
Publication Information:
This paper is intended for submission for the Industrial Control And Large Experimental Physics Control System (ICALEPSC) conference in October, 2011 (See web page http://icalepcs2011.esrf.eu/)

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