Computer modeling the ATLAS trigger/DAQ system performance

Author

Cranfield, Robert ; Golonka, Piotr ; Kaczmarska, Anna ; Korcyl, Krzysztof ; Vermeulen, Jos ; Wheeler, Sarah

Author_Institution

Univ. Coll. London, UK

Volume

51

Issue

3

fYear

2004

fDate

6/1/2004 12:00:00 AM

Firstpage

532

Lastpage

538

Abstract

In this paper, simulation ("computer modeling") of the Trigger/data acquisition (DAQ) system of the ATLAS experiment at the LHC accelerator is discussed. The system will consist of a few thousand end nodes, which are interconnected by a large Ethernet network. The nodes will run various applications under the Linux operating system (OS). Predictions for the latency, throughput and queue development in various places have been obtained. Results are presented with respect to the application of traffic shaping to reduce the probability of possible frame loss (which may cause severe performance degradation).

Keywords

Unix; data acquisition; discrete event simulation; local area networks; position sensitive particle detectors; probability; queueing theory; traffic control; ATLAS Trigger/DAQ system; Ethernet network; LHC accelerator; Linux operating system; computer modeling; data acquisition; discrete-event simulation; frame loss; latency; local area network; probability; queue development; queuing analysis; throughput; traffic control; traffic shaping; Application software; Computational modeling; Computer simulation; Data acquisition; Delay; Ethernet networks; Large Hadron Collider; Linux; Operating systems; System performance; Data acquisition; discrete-event simulation; local area network; modeling; queuing analysis; traffic control;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/TNS.2004.828825

Filename

1310553