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Conference papers

Supervision of the ATLAS High Level Trigger System

Abstract : The ATLAS High Level Trigger (HLT) system provides software-based event selection after the initial LVL1 hardware trigger. It is composed of two stages, the LVL2 trigger and the Event Filter. The HLT is implemented as software tasks running on large processor farms. An essential part of the HLT is the supervision system, which is responsible for configuring, coordinating, controlling and monitoring the many hundreds of processes running in the HLT. A prototype implementation of the supervision system, using tools from the ATLAS Online Software system is presented. Results from scalability tests are also presented where the supervision system was shown to be capable of controlling over 1000 HLT processes running on 230 nodes.
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Contributor : Danielle Cristofol <>
Submitted on : Tuesday, June 5, 2007 - 2:26:56 PM
Last modification on : Thursday, January 18, 2018 - 2:21:02 AM

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S. Wheeler, J. Flammer, C. Meessen, Z. Qian, F. Touchard, et al.. Supervision of the ATLAS High Level Trigger System. 2003 Conference for Computing in High Energy and Nuclear Physics, Mar 2003, La Jolla, United States. pp.TUGT009. ⟨in2p3-00151662⟩



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