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Event processing time prediction at the CMS experiment of the Large Hadron Collider

Cury, Samir and Gutsche, Oliver and Kcira, Dorian (2014) Event processing time prediction at the CMS experiment of the Large Hadron Collider. Journal of Physics: Conference Series, 513 (3). Art. No. 032023. ISSN 1742-6596. doi:10.1088/1742-6596/513/3/032023.

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The physics event reconstruction is one of the biggest challenges for the computing of the LHC experiments. Among the different tasks that computing systems of the CMS experiment performs, the reconstruction takes most of the available CPU resources. The reconstruction time of single collisions varies according to event complexity. Measurements were done in order to determine this correlation quantitatively, creating means to predict it based on the data-taking conditions of the input samples. Currently the data processing system splits tasks in groups with the same number of collisions and does not account for variations in the processing time. These variations can be large and can lead to a considerable increase in the time it takes for CMS workflows to finish. The goal of this study was to use estimates on processing time to more efficiently split the workflow into jobs. By considering the CPU time needed for each job the spread of the job-length distribution in a workflow is reduced.

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Kcira, Dorian0000-0002-8190-2414
Additional Information:© 2013. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Published under licence by IOP Publishing Ltd. CMS Tier 0 Team, CMS Workload Management Development Team, WLCG DashBoard Team, UERJ Department of High Energy Physics, US-CMS group at the California Institute of Technology, US-CMS group at the Fermi National Accelerator Laboratory.
Issue or Number:3
Classification Code:PACS: 29.40.Gx, 29.85.-c, 07.05.-t
Record Number:CaltechAUTHORS:20141030-092307833
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Official Citation:Event processing time prediction at the CMS experiment of the Large Hadron Collider Samir Cury et al 2014 J. Phys.: Conf. Ser. 513 032023
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51053
Deposited On:30 Oct 2014 17:23
Last Modified:12 Jul 2022 17:16

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