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Recent experience and future evolution of the CMS High Level Trigger System
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa Perez, Jose Antonio (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
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. [...]
CMS-CR-2012-167.-
Geneva : CERN, 2012 - 6 p.
Fulltext: PDF;
In : 18th IEEE Real-Time Conference 2012, Berkeley, California, 11 - 15 Jun 2012
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2.
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The CMS High Level Trigger System: Experience and Future Development
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bowen, Matthew (CERN) ; Branson, James G (UC, San Diego) ; Bukowiec, Sebastian (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa, J A (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
The CMS experiment at the LHC features a two-level trigger system. Events accepted by the first level trigger, at a maximum rate of 100 kHz, are read out by the Data Acquisition system (DAQ), and subsequently assembled in memory in a farm of computers running a software high-level trigger (HLT), which selects interesting events for offline storage and analysis at a rate of order few hundred Hz. [...]
CMS-CR-2012-147.-
Geneva : CERN, 2012 - 9 p.
- Published in : J. Phys.: Conf. Ser. 396 (2012) 012008
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012008
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3.
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Status of the CMS Detector Control System
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bouffet, Olivier (CERN) ; Bowen, Matthew (CERN) ; Branson, James G (UC, San Diego) ; Bukowiec, Sebastian (CERN) ; Ciganek, Marek (CERN) ; Cittolin, Sergio (UC, San Diego) ; Jose Antonio Coarasa (CERN) ; Deldicque, Christian (CERN) et al.
The Compact Muon Solenoid (CMS) is a CERN multi-purpose experiment that exploits the physics of the Large Hadron Collider (LHC). The Detector Control System (DCS) ensures a safe, correct and efficient experiment operation, contributing to the recording of high quality physics data. [...]
CMS-CR-2012-129.-
Geneva : CERN, 2012 - 11 p.
- Published in : J. Phys.: Conf. Ser. 396 (2012) 012023
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012023
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4.
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High availability through full redundancy of the CMS detector controls system
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bouffet, Olivier (CERN) ; Bowen, Matthew (CERN) ; Branson, James G (UC, San Diego) ; Bukowiec, Sebastian (CERN) ; Ciganek, Marek (CERN) ; Cittolin, Sergio (UC, San Diego) ; Jose Antonio Coarasa (CERN) ; Deldicque, Christian (CERN) et al.
The CMS detector control system (DCS) is responsible for controlling and monitoring the detector status and for the operation of all CMS sub detectors and infrastructure. This is required to ensure safe and efficient data taking so that high quality physics data can be recorded. [...]
CMS-CR-2012-128.-
Geneva : CERN, 2012 - 9 p.
- Published in : J. Phys.: Conf. Ser. 396 (2012) 012041
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012041
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5.
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A comprehensive zero-copy architecture for high performance distributed Data Acquisition over advanced network technologies for the CMS experiment
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa, J. A (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
This paper outlines a software architecture where zero-copy operations are used comprehensively at every processing point from the Application layer to the Physical layer. The proposed architecture is being used during feasibility studies on advanced networking technologies for the CMS experiment at CERN. [...]
2013
- Published in : IEEE Trans. Nucl. Sci. 60 (2013) 4595-4602
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6.
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A comprehensive zero-copy architecture for high performance distributed Data Acquisition over advanced network technologies for the CMS experiment
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa, J. A (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
This paper outlines a software architecture where zero-copy operations are used comprehensively at every processing point from the Application layer to the Physical layer. The proposed architecture is being used during feasibility studies on advanced networking technologies for the CMS experiment at CERN. [...]
CMS-CR-2012-135.-
Geneva : CERN, 2013 - 10 p.
Fulltext: PDF;
In : 18th IEEE Real-Time Conference 2012, Berkeley, California, 11 - 15 Jun 2012, pp.1-8
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7.
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Prototype of a File-Based High-Level Trigger in CMS
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa Perez, Jose Antonio (CERN) ; Darlea, Georgiana Lavinia (MIT) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
The DAQ system of the CMS experiment at the LHC is upgraded during the
accelerator shutdown in 2013/14. To reduce the interdependency of the DAQ
system and the high-level trigger (HLT), we investigate the feasibility of
using a file-system-based HLT. [...]
CMS-CR-2013-380.-
Geneva : CERN, 2014 - 8 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 012025
Fulltext: PDF;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.012025
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8.
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A New Event Builder for CMS Run II
/ Albertsson, Kim (CERN) ; Andre, Jean-marc Olivier (Fermilab) ; Andronidis, Anastasios (Ioannina U.) ; Behrens, Ulf (DESY) ; Branson, James (UC, San Diego) ; Chaze, Olivier (CERN) ; Cittolin, Sergio (UC, San Diego) ; Darlea, Georgiana Lavinia (MIT) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) et al.
The data acquisition system (DAQ) of the CMS experiment at the CERN Large Hadron Collider (LHC) assembles events at a rate of 100kHz, transporting event data at an aggregate throughput of 100GB/s to the high-level trigger (HLT) farm. The DAQ system has been redesigned during the LHC shutdown in 2013/14. [...]
CMS-CR-2015-063.-
Geneva : CERN, 2015 - 9 p.
- Published in : J. Phys.: Conf. Ser. 664 (2015) 082035
Fulltext: PDF; IOP Open Access article: PDF;
In : 21st International Conference on Computing in High Energy and Nuclear Physics, Okinawa, Japan, 13 - 17 Apr 2015, pp.082035
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9.
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The CMS Online Cluster: Setup, Operation and Maintenance of an Evolving Cluster
/ Coarasa, Jose Antonio (CERN) ; Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bouffet, Olivier (CERN) ; Branson, James G (UC, San Diego) ; Bukowiec, Sebastian (CERN) ; Chaze, Olivier (CERN) ; Ciganek, Marek (CERN) ; Cittolin, Sergio (UC, San Diego) ; Deldicque, Christian (CERN) et al.
The CMS online cluster consists of more than 2700 computers running about 15000 application instances. These applications implement the necessary services to run the data acquisition of the CMS experiment. [...]
CMS-CR-2012-041.-
Geneva : CERN, 2012 - 13 p.
- Published in : PoS: ISGC 2012 (2012) , pp. 023
Fulltext: PDF; Published version from PoS: PDF;
In : International Symposium on Grids and Clouds, Taipei, Taiwan, 26 Feb - 2 Mar 2012, pp.023
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10.
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Distributed error and alarm processing in the CMS data acquisition system
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bowen, Matthew (CERN) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa, J A (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
The error and alarm system for the data acquisition of the Compact Muon Solenoid (CMS) at CERN was successfully used for the physics runs at Large Hadron Collider (LHC) during first three years of activities. Error and alarm processing entails the notification, collection, storing and visualization of all exceptional conditions occurring in the highly distributed CMS online system using a uniform scheme. [...]
CMS-CR-2012-124.-
Geneva : CERN, 2012 - 14 p.
- Published in : J. Phys.: Conf. Ser. 396 (2012) 012038
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012038
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