Improved performance for the ATLAS ReadOut System with the switchbased architecture

About 600 custom-built ReadOut Buffer INput (ROBIN) PCI boards are used in the DataCollection system of the ATLAS experiment at CERN. They are plugged into the PCI slots of about 150 PCs of the ReadOut system (ROS). In the standard bus-based setup of the ROS requests and event data are passed via th...

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Detalles Bibliográficos
Autores principales: Schroer, N, Crone, G, Della Volpec, D, Gorini, B, Green, B, Joos, M, Kieft, G, Kordas, K, Kugel, A, Misiejuk, A, TeixeiraDias, P, Tremblet, L, Vermeulen, J, Werner, P, Wickens, F
Lenguaje:eng
Publicado: CERN 2009
Materias:
Detectors and Experimental Techniques
Acceso en línea:https://dx.doi.org/10.5170/CERN-2009-006.407
http://cds.cern.ch/record/1213490
Descripción
Sumario:About 600 custom-built ReadOut Buffer INput (ROBIN) PCI boards are used in the DataCollection system of the ATLAS experiment at CERN. They are plugged into the PCI slots of about 150 PCs of the ReadOut system (ROS). In the standard bus-based setup of the ROS requests and event data are passed via the PCI interfaces. The performance meets the requirements, but may need to be enhanced for more demanding use cases. Modifications in the software and firmware of the ROBINs have made it possible to improve the performance by using the onboard Gigabit Ethernet interfaces for passing part of the requests and of the data in the so called switch-based scenario. Details of these modifications as well as measurement results will be presented in this paper.

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