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Title: Current and Future Performance of the CMS Simulation

Abstract

The CMS full simulation using Geant4 has delivered billions of simulated events for analysis during Runs 1 and 2 of the LHC. However, the HL-LHC dataset will be an order of magnitude larger, with a similar increase in occupancy per event. In addition, the upgraded CMS detector will be considerably more complex, with an extended silicon tracker and a high granularity calorimeter in the endcap region. Increases in conventional computing resources are subject to both technological and budgetary limitations, so novel approaches are needed to improve software efficiency and to take advantage of new architectures and heterogeneous resources. Several projects are in development to address these needs, including the vectorized geometry library Vec-Geom and the GeantV transport engine, which uses track-level parallelization. The current computing performance of the CMS simulation will be presented as a baseline, along with an overview of the various optimizations already available for Geant4. Finally, the progress and outlook for integrating VecGeom and GeantV in the CMS software framework will be discussed.

Authors:
 [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
CERN-LHC-CMS
OSTI Identifier:
1571818
Report Number(s):
FERMILAB-CONF-18-784-SCD
Journal ID: ISSN 2100-014X; oai:inspirehep.net:1760575
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 214; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Pedro, Kevin. Current and Future Performance of the CMS Simulation. United States: N. p., 2019. Web. doi:10.1051/epjconf/201921402036.
Pedro, Kevin. Current and Future Performance of the CMS Simulation. United States. doi:10.1051/epjconf/201921402036.
Pedro, Kevin. Tue . "Current and Future Performance of the CMS Simulation". United States. doi:10.1051/epjconf/201921402036. https://www.osti.gov/servlets/purl/1571818.
@article{osti_1571818,
title = {Current and Future Performance of the CMS Simulation},
author = {Pedro, Kevin},
abstractNote = {The CMS full simulation using Geant4 has delivered billions of simulated events for analysis during Runs 1 and 2 of the LHC. However, the HL-LHC dataset will be an order of magnitude larger, with a similar increase in occupancy per event. In addition, the upgraded CMS detector will be considerably more complex, with an extended silicon tracker and a high granularity calorimeter in the endcap region. Increases in conventional computing resources are subject to both technological and budgetary limitations, so novel approaches are needed to improve software efficiency and to take advantage of new architectures and heterogeneous resources. Several projects are in development to address these needs, including the vectorized geometry library Vec-Geom and the GeantV transport engine, which uses track-level parallelization. The current computing performance of the CMS simulation will be presented as a baseline, along with an overview of the various optimizations already available for Geant4. Finally, the progress and outlook for integrating VecGeom and GeantV in the CMS software framework will be discussed.},
doi = {10.1051/epjconf/201921402036},
journal = {EPJ Web of Conferences},
number = ,
volume = 214,
place = {United States},
year = {2019},
month = {9}
}

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