An Embedded Real-Time System on ATLAS ROBIN

Yu, Maoyuan

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URN: urn:nbn:de:bsz:180-madoc-330107
Document Type: Doctoral dissertation
Year of publication: 2012
Place of publication: Mannheim
University: Universität Mannheim
Evaluator: Männer, Reinhard
Date of oral examination: 24 January 2013
Publication language: English
Institution: School of Business Informatics and Mathematics > Informatik V (Männer -2008)
Subject: 004 Computer science, internet
Subject headings (SWD): Echtzeitverarbeitung , Eingebettetes System , Pufferspeicher , PowerPC , Hash-Algorithmus , LINUX
Keywords (English): Real-Time , Embedded system , IBM PowerPC , Buffer Memory , Hash-Funktion , LINUX
Abstract: ATLAS is the largest particle detector at the Large Hadron Collider for high energy physics experiments that produces over 40 TB/s event data. The ATLAS Readout Buffer INput(ROBIN) subsystem is an essential device to buffer and reduce the data, which has a IBM PowerPC core for the control functionalities. This dissertation addresses the software design of an embedded real-time system centering on the PowerPC micro-controller, as the management core of the ROBIN. A page-based solution is presented to handle the event buffer management, and a hash searching scheme is applied to deal with the event lookup. An embedded real-time Linux operating system is adapted and optimized for the ROBIN PowerPC processor. The experiment results show that the standalone non-OS based PowerPC system is already above the current ATLAS requirements, while the real-time Linux based ROBIN PowerPC system does not meet the related ROBIN baseline performance requirement.

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