21-25 May 2012
New York City, NY, USA
US/Eastern timezone

Improving Geant4 multi-core's performance and usability

24 May 2012, 13:30
4h 45m
Rosenthal Pavilion (10th floor) (Kimmel Center)

Rosenthal Pavilion (10th floor)

Kimmel Center

Poster Event Processing (track 2) Poster Session

Speakers

Dr John Apostolakis (CERN) Xin Dong (Northeastern University)

Description

We report on the progress of the multi-core versions of Geant4, including multi-process and multi-threaded Geant4. The performance of the multi-threaded version of Geant4 has been measured, identifying an overhead compared with the sequential version of 20-30%. We explain the reasons, and the improvements introduced to reduce this overhead. In addition we have improved the design of a few key classes of Geant4 were revised in order to simplify the design and improve the implementation of multi-threaded and reduce the memory footprint of multi-process Geant4. The process for adapting user applications to Geant4 multi-threaded has been documented and streamlined. Most applications can be adapted within 1-2 working days. Tools to verify that the results of a multi-threaded application are exactly equal to the sequential version are under development. In addition we present an overview of the test coverage undertaken to ensure that the Geant4 multi-threaded are fully compatible with the sequential version.
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Primary author

Xin Dong (Northeastern University)

Co-authors

Andrzej Nowak (CERN) Gene Cooperman (Unknown) Dr John Apostolakis (CERN) Makoto Asai (SLAC National Accelerator Laboratory (US)) Mr Sverre Jarp (CERN)

Presentation Materials