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A new event builder for CMS Run II [electronic resource].

Published
Washington, D.C. : United States. Dept. of Energy. High Energy Physics Division, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description
Article numbers 082,035 : digital, PDF file
Additional Creators
Fermi National Accelerator Laboratory, United States. Department of Energy. High Energy Physics Division, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The data acquisition system (DAQ) of the CMS experiment at the CERN Large Hadron Collider (LHC) assembles events at a rate of 100 kHz, transporting event data at an aggregate throughput of 100 GB/s to the high-level trigger (HLT) farm. The DAQ system has been redesigned during the LHC shutdown in 2013/14. The new DAQ architecture is based on state-of-the-art network technologies for the event building. For the data concentration, 10/40 Gbps 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 Gbps Inniband FDR CLOS network has been chosen for the event builder. This paper discusses the software design, protocols, and optimizations for exploiting the hardware capabilities. In conclusion, ee present performance measurements from small-scale prototypes and from the full-scale production system.
Report Numbers
E 1.99:fermilab-conf--15-206-e
fermilab-conf--15-206-e
Subject(s)
Note
Published through SciTech Connect.
12/23/2015.
"fermilab-conf--15-206-e"
"1408132"
Journal of Physics. Conference Series 664 8 ISSN 1742-6588 AM
21st International Conference on Computing in High Energy and Nuclear Physics, Okinawa (Japan), 13-17 Apr 2015.
K. Albertsson; J-M Andre; A. Andronidis; U. Behrens; J. Branson; O. Chaze; S. Cittolin; G-L Darlea; C. Deldicque; M. Dobson; A. Dupont; S. Erhan; D. Gigi; F. Glege; G. Gomez-Ceballos; J. Hegeman; A. Holzner; R. Jimenez-Estupiñán; L. Masetti; F. Meijers; E. Meschi; R. K. Mommsen; S. Morovic; C. Nunez-Barranco-Fernandez; V. O'Dell; et al.
Funding Information
AC02-07CH11359
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