Mar 21 – 27, 2009
Europe/Prague timezone

Tuning and optimization of the CMS simulation software

Mar 24, 2009, 3:20 PM
Club E (Prague)

Club E


Prague Congress Centre 5. května 65, 140 00 Prague 4, Czech Republic
oral Event Processing Event Processing


Dr Fabio Cossutti (INFN Trieste)


The CMS simulation has been operational within the new CMS software framework for more than 3 years. While the description of the detector, in particular in the forward region, is being completed, during the last year the emphasis of the work has been put on fine tuning of the physics output. The existing test beam data for the different components of the calorimetric system have been exploited to adjust different parts of the Geant4 models for hadronic and electromagnetic showers, as well as the CMS custom code used, in close collaboration with Geant4 developers. Significant improvements have been achieved in describing the data. A consequence of this work has been a sizable deterioration of the computing performances of the code, already under close monitoring. A suite of performance analysis tools has been put in place and has been used to drive several optimizations to allow the code to fit the constraints posed by the CMS computing model.

Primary author

Dr Fabio Cossutti (INFN Trieste)

Presentation materials