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23 results on '"Pollet, Lucien"'

1. Effects of adaptive wormhole routing in event builder networks

Author

Bauer, Gerry, Boyer, Vincent, Branson, James, Brett, Angela, Cano, Eric, Carboni, Andrea, Ciganek, Marek, Cittolin, Sergio, Erhan, Samim, Gigi, Dominique, Glege, Frank, Gomez-Reino, Robert, Gulmini, Michele, Mlot, Esteban Gutierrez, Gutleber, Johannes, Jacobs, Claude, Kim, Jin Cheol, Klute, Markus, Lipeles, Elliot, Perez, Juan Antonio Lopez, Maron, Gaetano, Meijers, Frans, Meschi, Emilio, Moser, Roland, Murray, Steven, Oh, Alexander, Orsini, Luciano, Paus, Christoph, Petrucci, Andrea, Pieri, Marco, Pollet, Lucien, Racz, Attila, Sakulin, Hannes, Sani, Matteo, Schieferdecker, Philipp, Schwick, Christoph, Sumorok, Konstanty, Suzuki, Ichiro, Tsirigkas, Dimitrios, and Varela, Joao

Subjects
Computer networks -- Management, Information networks -- Management, Data entry -- Methods, Gigabit ethernet -- Equipment and supplies, Computer networks -- Equipment and supplies, Computer networks -- Usage, Gigabit Ethernet, Monitor/keyboard extender, Company business management, Business, Electronics, Electronics and electrical industries
Abstract

The data acquisition system of the CMS experiment at the Large Hadron Collider features a two-stage event builder, which combines data from about 500 sources into full events at an aggregate throughput of 100 GB/s. To meet the requirements, several architectures and interconnect technologies have been quantitatively evaluated. Myrinet will be used for the communication from the underground frontend devices to the surface event building system. Gigabit Ethernet is deployed in the surface event building system. Nearly full bi-section throughput can be obtained using a custom software driver for Myrinet based on barrel shifter traffic shaping. This paper discusses the use of Myrinet dual-port network interface cards supporting channel bonding to achieve virtual 5 GBit/s links with adaptive routing to alleviate the throughput limitations associated with wormhole routing. Adaptive routing is not expected to be suitable for high-throughput event builder applications in high-energy physics. To corroborate this claim, results from the CMS event builder preseries installation at CERN are presented and the problems of wormhole routing networks are discussed. Index Terms--Computer network performance, multistage interconnection networks, queuing analysis, routing.

Published
2008

2. The terabit/s super-fragment builder and Trigger Throttling System for the Compact Muon Solenoid experiment at CERN

Author

Bauer, Gerry, Boyer, Vincent, Branson, James, Brett, Angela, Cano, Eric, Carboni, Andrea, Ciganek, Marek, Cittolin, Sergio, Erhan, Samim, Gigi, Dominique, Glege, Frank, Gomez-Reino, Robert, Gulmini, Michele, Mlot, Esteban Gutierrez, Gutleber, Johannes, Jacobs, Claude, Kim, Jin Cheol, Klute, Markus, Lipeles, Elliot, Perez, Juan Antonio Lopez, Maron, Gaetano, Meijers, Frans, Meschi, Emilio, Moser, Roland, Murray, Steven, Oh, Alexander, Orsini, Luciano, Paus, Christoph, Petrucci, Andrea, Pieri, Marco, Pollet, Lucien, Racz, Attila, Sakulin, Hannes, Sani, Matteo, Schieferdecker, Philipp, Schwick, Christoph, Sumorok, Konstanty, Suzuki, Ichiro, Tsirigkas, Dimitrios, and Varela, Joao

Subjects
Data entry -- Methods, Radiation warning systems -- Usage, Feedback control systems -- Methods, Business, Electronics, Electronics and electrical industries
Abstract

The Data Acquisition System of the Compact Muon Solenoid experiment at the Large Hadron Collider reads out event fragments of an average size of 2 kB from around 650 detector front-ends at a rate of up to 100 kHz. The first stage of event-building is performed by the Super-Fragment Builder employing custom-built electronics and a Myrinet optical network. It reduces the number of fragments by one order of magnitude, thereby greatly decreasing the requirements for the subsequent event-assembly stage. Back-pressure from the down-stream event-processing or variations in the size and rate of events may give rise to buffer overflows in the subdetector's front-end electronics, which would result in data corruption and would require a time-consuming re-sync procedure to recover. The Trigger-Throttling System protects against these buffer overflows. It provides fast feedback from any of the subdetector front-ends to the trigger so that the trigger can be throttled before buffers overflow. This paper reports on new performance measurements and on the recent successful integration of a scaled-down setup of the described system with the trigger and with front-ends of all major subdetectors. The on-going commissioning of the full-scale system is discussed. Index Terms--Data acquisition, feedback systems, multistage interconnection networks, triggering.

Published
2008

3. The CMS high level trigger system

Author

Afaq, Anzar, Badgett, William, Bauer, Gerry, Biery, Kurt, Boyer, Vincent, Branson, James, Brett, Angela, Cano, Eric, Carboni, Andrea, Cheung, Harry, Ciganek, Marek, Cittolin, Sergio, Dagenhart, William, Erhan, Samim, Gigi, Dominique, Glege, Frank, Gomez-Reino, Robert, Gulmini, Michele, Gutleber, Johannes, Jacobs, Claude, Kim, Jin Cheol, Klute, Markus, Kowalkowski, Jim, Lipeles, Elliot, Perez, Juan Antonio Lopez, Maron, Gaetano, Meijers, Frans, Meschi, Emilio, Moser, Roland, Mlot, Esteban Gutierrez, Murray, Steven, Oh, Alexander, Orsini, Luciano, Paus, Christoph, Petrucci, Andrea, Pieri, Marco, Pollet, Lucien, Racz, Attila, Sakulin, Hannes, Sani, Matteo, Schieferdecker, Philipp, Schwick, Christoph, Sexton-Kennedy, Elizabeth, Sumorok, Konstanty, Suzuki, Ichiro, Tsirigkas, Dimitrios, and Varela, Joao

Subjects
Data entry -- Methods, Software -- Usage, Software quality, Business, Electronics, Electronics and electrical industries
Abstract

The CMS Data Acquisition (DAQ) System relies on a purely software driven High Level Trigger (HLT) to reduce the full Level 1 accept rate of 100 kHz to approximately 100 Hz for archiving and later offline analysis. The HLT operates on the full information of events assembled by an event builder collecting detector data from the CMS front-end systems. The HLT software consists of a sequence of reconstruction and filtering modules executed on a farm of O(1000) CPUs built from commodity hardware. This paper presents the architecture of the CMS HLT, which integrates the CMS reconstruction framework in the online environment. The mechanisms to configure, control, and monitor the Filter Farm and the procedures to validate the filtering code within the DAQ environment are described. Index Terms--Data acquisition, high level triggering, triggering.

Published
2008

4. Flexible custom designs for CMS DAQ

Author

Arcidiacono, Roberta, Bauer, Gerry, Boyer, Vincent, Brett, Angela, Cano, Eric, Carboni, Andrea, Ciganek, Marek, Cittolin, Sergio, Erhan, Samim, Gigi, Dominique, Glege, Frank, Gomez-Reino Garrido, Robert, Gulmini, Michele, Gutleber, Johannes, Jacobs, Claude, Maron, Gaetano, Meijers, Frans, Meschi, Emilio, Murray, Steven, Oh, Alexander, Orsini, Luciano, Paus, Christoph, Petrucci, Andrea, Gomez, Jonatan Piedra, Pieri, Marco, Pollet, Lucien, Racz, Attila, Sakulin, Hannes, Schwick, Christoph, Sumorok, Konstanty, Suzuki, Ichiro, Tsirigkas, Dimitrios, and Varela, Joao

Published
2007
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8. The Run Control and Monitoring System of the CMS Experiment

Author

Bauer, Gerry, Boyer, Vincent, Branson, James G, Brett, Angela Mary, Cano, Eric, Carboni, Andrea, Ciganek, Marek, Cittolin, Sergio, O'dell, Vivian, Erhan, Samim, Gigi, Dominique, Glege, Frank, Gomez-Reino, Robert, Gulmini, Michele, Gutleber, Johannes, Klute, Markus, Lipeles, Elliot, Maron, Gaetano, Meijers, Frans, Meschi, Emilio, Moser, Roland, Gutierrez, Esteban, Murray, Steven John, Oh, Alexander, Orsini, Luciano, Paus, Christoph, Petrucci, Andrea, Pieri, Marco, Pollet, Lucien, Racz, Attila, Sakulin, Hannes, Sani, Matteo, Schieferdecker, Philipp, Schwick, Christoph, Sumorok, Konstanty, Suzuki, Ichiro, Tsirigkas, Dimitrios, Varela, Joao, Kim, Jin Cheol, Lopez Perez, Juan Antonio, and Gutierrez Molt, Esteban

Subjects
Detectors and Experimental Techniques
Abstract

The CMS experiment at the LHC at CERN will start taking data in 2008. To configure, control and monitor the experiment during data-taking the Run Control and Monitoring System (RCMS) was developed. This paper describes the architecture and the technology used to implement the RCMS, as well as the deployment and commissioning strategy of this important component of the online software for the CMS experiment.

Published
2007

9. The Final prototype of the Fast Merging Module (FMM) for readout status processing in CMS DAQ

Author

Rácz, Attila, Brigljevic, Vuko, Bruno, Giacomo, Cano, Eric, Cittolin, Sergio, Erhan, Samim, Gigi, Dominique, Glege, Frank, Gómez-Reino Garrido, R, Gulmini, Michele, Gutleber, Johannes, Jacobs, Claude, Kreuzer, Peter, Lo Presti, Giuseppe, Magrans de Abril, Ildefons, Marinelli, Nancy, Maron, Gaetano, Meijers, Frans, Meschi, Emilio, Murray, Stephen S, Oh, Alexander, Orsini, Luciano, Pieri, Marco, Pollet, Lucien, Rosinsky, Peter, Schwick, Christoph, Sphicas, Paris, and Varela, Joao

Subjects
Detectors and Experimental Techniques
Published
2004

10. CMS data to surface transportation architecture

Author

Cano, E, Cittolin, Sergio, Csilling, Akos, Erhan, S, Gigi, D, Glege, F, Gutleber, J, Jacobs, C, Kozlovskii, Miroslaw P, Larsen, H, Magrans de Abril, Ildefons, Meijers, F, Meschi, E, Murray, S, Oh, A, Orsini, L, Pollet, Lucien, Rácz, A, Samyn, D, Scharff-Hansen, P, Sphicas, Paris, Schwick, C, and Strodl, T

Subjects
Detectors and Experimental Techniques
Published
2002

11. FED-kit design for CMS DAQ system

Author

Cano, E, Csilling, Akos, Cittolin, Sergio, Erhan, S, Giacomo, B, Gigi, D, Glege, F, Gutleber, J, Jacobs, C, Meijers, F, Meschi, E, Murray, S, Oh, A, Orsini, L, Pollet, Lucien, Rácz, A, Samyn, D, Scharff-Hansen, P, Schwick, C, and Sphicas, Paris

Subjects
Detectors and Experimental Techniques
Published
2002

12. Front-End/DAQ Interfaces in CMS

Author

Antchev, G, Cano, E, Cittolin, Sergio, Erhan, S, Funk, W, Gigi, D, Glege, F, Gras, P, Gutleber, J, Jacobs, C, Meijers, F, Meschi, E, Orsini, L, Pollet, Lucien, Rácz, A, Samyn, D, Schleifer, W, Sphicas, Paris, and Schwick, C

Subjects
Detectors and Experimental Techniques
Published
2001

13. Status report on the RD12 project: timing, trigger and control systems for LHC detectors

Author

Ashton, M, Humphries, J, Villalobos Baillie, O, Christiansen, J, Cittolin, Sergio, Ermoline, Y, Farthouat, Philippe, Gällnö, P, Jarron, Pierre, Marchioro, A, Moreira, P, Pollet, Lucien, Rácz, A, Varela, J, Schmidt, H R, Hubert, J C, McFarlane, G, Da Silva, J C, Genat, J F, Hallsal, R N J, Haynes, W J, Ferrer-Prieto, J, Toifl, Thomas H, and Taylor, B G

Subjects
Detectors and Experimental Techniques
Published
2000

14. Readout unit prototypes for the CMS DAQ system

Author

Antchev, G H, Cano, E, Cittolin, Sergio, Erhan, S, Faure, B I, Gigi, D, Gutleber, J, Jacobs, C, Meijers, F, Meschi, E, Ninane, A, Orsini, L, Pollet, Lucien, Rácz, A, Samyn, D, Sinanis, N, Schleifer, W, and Sphicas, Paris

Subjects
Detectors and Experimental Techniques
Published
2000

15. Software developments for the readout unit prototypes for CMS DAQ system

Author

Bellato, M A, Cano, E, Cittolin, Sergio, Faure, B I, Gigi, D, Gutleber, J, Jacobs, C, Meijers, F, Meschi, E, Orsini, L, Pollet, Lucien, Rácz, A, Samyn, D, Schleifer, W, Sphicas, Paris, Sinanis, N, Erthan, S, Ninane, A, and Antchev, G H

Subjects
Detectors and Experimental Techniques
Published
2000

16. CMS front-end / DAQ interfacing

Author

Antchev, G H, Cano, E, Cittolin, Sergio, Erhan, S, Faure, B I, Gigi, D, Gutleber, J, Jacobs, C, Meijers, F, Meschi, E, Ninane, A, Orsini, L, Pollet, Lucien, Rácz, A, Samyn, D, Sinanis, N, Schleifer, W, and Sphicas, Paris

Subjects
Detectors and Experimental Techniques
Published
2000

17. Generic hardware for DAQ applications

Author

Antchev, G H, Cano, E, Chatellier, S, Cittolin, Sergio, Erhan, S, Gigi, D, Gutleber, J, Jacobs, C, Meijers, F, Nicolau, R, Orsini, L, Pollet, Lucien, Rácz, A, Samyn, D, Sinanis, N, and Sphicas, Paris

Subjects
Detectors and Experimental Techniques
Published
1999

18. Status Report on the RD-12 Project: timing, trigger and control systems for LHC dectectors

Author

Ashton, M, Humphries, J, Villalobos Baillie, O, Christiansen, J, Cittolin, Sergio, Ermoline, Y, Farthouat, Philippe, Gällnö, P, Jarron, Pierre, Marchioro, A, Moreira, P, Pollet, Lucien, Rácz, A, Varela, J, Schmidt, H R, Hubert, J C, McFarlane, G, Bouianov, O, Da Silva, J C, Genat, J F, Hallsal, R N J, Haynes, W J, Ferrer-Prieto, J, Toifl, Thomas H, and Taylor, B G

Subjects
Detectors and Experimental Techniques
Published
1998

19. Status report on the RD-12 project: timing, trigger and control systems for LHC detectors

Author

Villalobos Baillie, O, Christiansen, J, Cittolin, Sergio, Ermoline, Y, Farthouat, Philippe, Jarron, Pierre, Marchioro, A, Moreira, P, Pollet, Lucien, Rácz, A, Taylor, B G, Schmidt, H R, Bouianov, O, Ashton, L M, Humphries, J, Genat, J F, Hallsal, R N J, Haynes, W J, Hubert, J C, McFarlane, G, and Ferrer-Prieto, J

Subjects
Detectors and Experimental Techniques
Published
1997

23. Infrastructures and monitoring of the on-line CMS computing centre

Author

Bauer, Gerry, Behrens, Ulf, Biery, Kurt, Branson, James, Cano, Eric, Cheung, Harry, Ciganek, Marek, Cittolin, Sergio, Coarasa Perez, Jose Antonio, Deldicque, Christian, Dusinberre, Elizabeth, Erhan, Samim, Fortes Rodrigues, Fabiana, Gigi, Dominique, Glege, Frank, Gomez-Reino, Robert, Gutleber, Johannes, Hatton, Derek, Laurens, Jean-Francois, Lipeles, Elliot David, Lopez Perez, Juan Antonio, Meijers, Frans, Meschi, Emilio, Meyer, Andreas, Moser, Roland, O, Vivian, Oh, Alexander, Orsini, Luciano, Patras, Vaios, Paus, Christoph, Petrucci, Andrea, Marco Pieri, Pollet, Lucien, Racz, Attila, Sakulin, Hannes, Sani, Matteo, Schieferdecker, Philipp, Schwick, Christoph, Simon, Sean, Sumorok, Konstanty, Varela, Joao, and Zanetti, Marco

Subjects
Detectors and Experimental Techniques
Abstract

This paper describes in detail the infrastructure and installation of the CMS on-line computing centre (CMSOLC) and its associated monitoring system. In summer 2007, 640 PCs acting as detector Readout Units for the CMS Data Acquisition System (DAQ) were deployed along with ~150 servers for DAQ general services. Since summer 2008, ~900 PCs acting as DAQ Event Builder Units/Filter Units have been added and today, the CMSOLC has an on-line processing capability sufficient for a Level 1 trigger accept rate of 50 kHz. To ensure that these ~1700 PCs are running efficiently, a multi-level monitoring system has been put in place. This system is also described in this paper.

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