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1.
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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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2.
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10 Gbps TCP/IP streams from the FPGA for the CMS DAQ Eventbuilder Network
/ 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.
For the upgrade of the DAQ of the CMS experiment in 2013/2014 an interface between the custom detector Front End Drivers (FEDs) and the new DAQ eventbuilder network has to be designed. For a loss-less data collection from more then 600 FEDs a new FPGA based card implementing the TCP/IP protocol suite over 10Gbps Ethernet has been developed. [...]
CMS-CR-2013-416.-
Geneva : CERN, 2013 - 11 p.
- Published in : JINST 8 (2013) C12039
Fulltext: PDF; IOP Open Access article: PDF;
In : Topical Workshop on Electronics for Particle Physics, Perugia, Italy, 23 - 27 Sep 2013, pp.C12039
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3.
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10~Gbps TCP/IP streams from the FPGA for High Energy Physics
/ 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 CERN collects data from more than 600 custom detector Front-End Drivers (FEDs). During 2013 and 2014 the CMS DAQ system will undergo a major upgrade to address the obsolescence of current hardware and the requirements posed by the upgrade of the LHC accelerator and various detector components. [...]
CMS-CR-2013-402.-
Geneva : CERN, 2014 - 8 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 012042
Fulltext: PDF;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.012042
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4.
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Automating the CMS DAQ
/ Bauer, Gerry (MIT) ; Bawej, Tomasz Adrian (CERN) ; 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) et al.
We present the automation mechanisms that have been added to the Data Acquisition and Run Control systems of the Compact Muon Solenoid (CMS) experiment during Run 1 of the LHC, ranging from the automation of routine tasks to automatic error recovery and context-sensitive guidance to the operator. These mechanisms helped CMS to maintain a data taking efficiency above 90\% and to even improve it to 95\% towards the end of Run 1, despite an increase in the occurrence of single-event upsets in sub-detector electronics at high LHC luminosity..
CMS-CR-2013-399.-
Geneva : CERN, 2014 - 7 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 012031
Fulltext: PDF;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.012031
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5.
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The new CMS DAQ system for LHC operation after 2014 (DAQ2).
/ Bauer, Gerry (MIT) ; Bawej, Tomasz Adrian (CERN) ; 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) et al.
The Data Acquisition system of the Compact Muon Solenoid experiment at
CERN assembles events at a rate of 100 kHz, transporting event data at
an aggregate throughput of 100 GByte/s.
%
We are presenting the design of the 2nd
generation DAQ system, including studies of the event builder based on
advanced networking technologies such as 10 and 40 Gbit/s Ethernet and
56 Gbit/s FDR Infiniband and exploitation of multicore CPU
architectures. [...]
CMS-CR-2013-394.-
Geneva : CERN, 2014 - 9 p.
- Published in : J. Phys.: Conf. Ser. 513 (2014) 012014
Fulltext: PDF;
In : 20th International Conference on Computing in High Energy and Nuclear Physics 2013, Amsterdam, Netherlands, 14 - 18 Oct 2013, pp.012014
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6.
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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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7.
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Health And Performance Monitoring Of The Online Computer Cluster Of CMS
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bouffet, Olivier (CERN) ; Bowen, Matthew (CERN) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Ciganek, Marek (CERN) ; Cittolin, Sergio (UC, San Diego) ; Coarasa Perez, Jose Antonio (CERN) ; Deldicque, Christian (CERN) et al.
The CMS experiment's online cluster consists of 2300 computers and 170 switches or routers
operating on a 24-hour basis. This huge infrastructure must be monitored in a way that the administrators
are pro-actively warned of any failures or degradation in the system, in order to avoid or minimize
downtime of the system which can lead to loss of data taking. [...]
CMS-CR-2012-158.-
Geneva : CERN, 2012 - 8 p.
- Published in : J. Phys.: Conf. Ser. 396 (2012) 042049
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.042049
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8.
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Upgrade of the CMS Event Builder
/ Bauer, Gerry (MIT) ; Behrens, Ulf (DESY) ; Bowen, Matthew (CERN) ; Branson, James (UC, San Diego) ; Bukowiec, Sebastian Czeslaw (CERN) ; Cittolin, Sergio (UC, San Diego) ; Perez, J A Coarasa (CERN) ; Deldicque, Christian (CERN) ; Dobson, Marc (CERN) ; Dupont, Aymeric (CERN) et al.
The Data Acquisition system of the Compact Muon Solenoid experiment at CERN assembles events at a rate of 100 kHz, transporting event data at an aggregate throughput of 100 GB/s. By the time the LHC restarts after the 2013/14 shut-down, the current computing and networking infrastructure will have reached the end of their lifetime. [...]
CMS-CR-2012-172.-
Geneva : CERN, 2012 - 9 p.
- Published in : J. Phys.: Conf. Ser. 396 (2012) 012039
Fulltext: PDF;
In : Computing in High Energy and Nuclear Physics 2012, New York, NY, USA, 21 - 25 May 2012, pp.012039
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9.
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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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10.
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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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