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May 8 – 12, 2023
Norfolk Waterside Marriott
US/Eastern timezone

Multithreading ATLAS offline software: a retrospective

May 9, 2023, 11:45 AM
Hampton Roads Ballroom VI (Norfolk Waterside Marriott)

Hampton Roads Ballroom VI

Norfolk Waterside Marriott

235 East Main Street Norfolk, VA 23510
Oral Track 3 - Offline Computing Track 3 - Offline Computing


Snyder, Scott (Brookhaven National Laboratory)


For Run 3, ATLAS redesigned its offline software, Athena, so that the
main workflows run completely multithreaded. The resulting substantial
reduction in the overall memory requirements allows for better use
of machines with many cores. This talk will discuss the performance
achieved by the multithreaded reconstruction as well as the process
of migrating the large ATLAS code base and tools and techniques
that were useful in debugging threading-related problems.

Consider for long presentation No

Primary authors

Snyder, Scott (Brookhaven National Laboratory) Krasznahorkay, Attila (CERN) Leggett, Charles (Lawrence Berkeley National Laboratory) Mete, Alaettin Serhan (Argonne National Laboratory (US)) Tsulaia, Vakho (LBNL) Dr Winklmeier, Frank (University of Oregon)

Presentation materials

Peer reviewing