Performance of the CMS Event Builder

Andre, J-M; Behrens, U.; Branson, J.; Brummer, P.; Chaze, O.; Cittolin, S.; Contescu, C.; Craigs, B. G.; Darlea, G-L; Deldicque, C.; Demiragli, Z.; Dobson, M.; Doualot, N.; Erhan, S.; Fulcher, J. F.; Gigi, D.; Gładki, M.; Glege, F.; Gomez-Ceballos, G.; Hegeman, J.; Holzner, A.; Janulis, M.; Jimenez-Estupiñán, R.; Masetti, L.; Meijers, F.; Meschi, E.; Mommsen, R. K.; Morovic, S.; O’Dell, V.; Orsini, L.; Paus, C.; Petrova, P.; Pieri, M.; Racz, A.; Reis, T.; Sakulin, H.; Schwick, C.; Simelevicius, D.; Zejdl, P.

doi:10.1088/1742-6596/898/3/032020

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Performance of the CMS Event Builder

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Abstract

The data acquisition system (DAQ) of the CMS experiment at the CERN Large Hadron Collider assembles events at a rate of 100 kHz, transporting event data at an aggregate throughput of to the high-level trigger farm. The DAQ architecture is based on state-of-the-art network technologies for the event building. For the data concentration, 10/40 Gbit/s Ethernet technologies are used together with a reduced TCP/IP protocol implemented in FPGA for a reliable transport between custom electronics and commercial computing hardware. A 56 Gbit/s Infiniband FDR Clos network has been chosen for the event builder. This paper presents the implementation and performance of the event-building system.

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Andre, J-M, Behrens, U., Branson, J., Brummer, P., Chaze, O., Cittolin, S., Contescu, C., Craigs, B. G., Darlea, G-L, Deldicque, C., Demiragli, Z., Dobson, M., Doualot, N., Erhan, S., Fulcher, J. F., Gigi, D., Gładki, M., Glege, F., Gomez-Ceballos, G., Hegeman, J., Holzner, A., Janulis, M., Jimenez-Estupiñán, R., Masetti, L., Meijers, F., Meschi, E., Mommsen, R. K., Morovic, S., O’Dell, V., Orsini, L., Paus, C., Petrova, P., Pieri, M., Racz, A., Reis, T., Sakulin, H., Schwick, C., Simelevicius, D., Zejdl, P.. 2017-11-23. Performance of the CMS Event Builder. https://doi.org/10.1088/1742-6596%2F898%2F3%2F032020

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