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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Bauer, G. Behrens, U. Branson, J. Bukowiec, S. Chaze, O. Cittolin, S. Coarasa, J.A. Deldicque, C. Dobson, M. Dupont, A. Erhan, S. Gigi, D. Glege, F. Gomez-Reino, R. Hartl, C. Holzner, A. Masetti, L. Meijers, F. Meschi, E. Mommsen, R.K. Nunez-Barranco-Fernandez, C. O'Dell, V. Orsini, L. Paus, C. Petrucci, A. Pieri, M. Polese, G. Racz, A. Raginel, O. Sakulin, H. Sani, M. Schwick, C. Spataru, A.C. Stoeckli, F. Sumorok, K. |
| Copyright Year | 2012 |
| Description | Author affiliation: DESY, Hamburg, Germany (Behrens, U.) || University of California San Diego, La Jolla, USA (Branson, J.; Cittolin, S.; Holzner, A.; Pieri, M.; Sani, M.) || FNAL, Batavia, Illinois, USA (Mommsen, R.K.; O'Dell, V.) || University of California, Los Angeles, USA (Erhan, S.) || Massachusetts Institute of Technology, Cambridge, USA (Bauer, G.; Paus, C.; Raginel, O.; Stoeckli, F.; Sumorok, K.) || CERN, Geneva, Switzerland (Bukowiec, S.; Chaze, O.; Coarasa, J.A.; Deldicque, C.; Dobson, M.; Dupont, A.; Gigi, D.; Glege, F.; Gomez-Reino, R.; Hartl, C.; Masetti, L.; Meijers, F.; Meschi, E.; Nunez-Barranco-Fernandez, C.; Orsini, L.; Petrucci, A.; Polese, G.; Racz, A.; Sakulin, H.; Schwick, C.; Spataru, A.C.) |
| Abstract | The CMS experiment at the LHC uses a two-stage trigger system, with events flowing from the first level trigger at a rate of 100 kHz. These events are read out by the Data Acquisition system (DAQ), assembled in memory in a farm of computers, and finally fed into the high-level trigger (HLT) software running on the farm. The HLT software selects interesting events for offline storage and analysis at a rate of a few hundred Hz. The HLT algorithms consist of sequences of offline-style reconstruction and filtering modules, executed on a farm of 0(10000) CPU cores built from commodity hardware. Experience from the 2010–2011 collider run is detailed, as well as the current architecture of the CMS HLT, and its integration with the CMS reconstruction framework and CMS DAQ. The short- and medium-term evolution of the HLT software infrastructure is discussed, with future improvements aimed at supporting extensions of the HLT computing power, and addressing remaining performance and maintenance issues. |
| Starting Page | 1 |
| Ending Page | 5 |
| File Size | 2214812 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781467310826 |
| e-ISBN | 9781467310840 |
| DOI | 10.1109/RTC.2012.6418362 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-06-09 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Physics Data acquisition Filtering algorithms Software algorithms Hardware Program processors |
| Content Type | Text |
| Resource Type | Article |
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