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T: Fachverband Teilchenphysik

T 79: Data Analysis, Information Technology and Artificial Intelligence 4

T 79.7: Vortrag

Mittwoch, 23. März 2022, 17:45–18:00, T-H38

Performance portability for the Physics Object Reconstruction Software of the CMS Experiment — •Wahid Redjeb — RWTH University, III. Physikalisches Institut A, Aachen, Germany

The High Luminosity upgrade of the LHC will pose unprecedented challenges for the offline and online computing. The higher luminosity and pileup will require larger processing power, not achievable with the current CPUs. Heterogeneous computing will play a fundamental role in the physics object reconstruction software to fully exploit the reach of the HL-LHC. Several computing architectures are available for the CMS software, but specialized implementations for each of them is not sustainable in terms of development, maintenance and validation. Performance Portability libraries allow performance portability across different hardware architectures with a single code basis. In this talk, we present the last results of the first usage of the Alpaka performance portability library on a standalone version of the reconstruction of tracks and vertices in the CMS silicon pixel detector. Porting the pixel tracks and vertices reconstruction to Alpaka demonstrates the possibility of writing a single source code that can be executed on different devices with different parallelization strategies, achieving similar performance with respect to the native implementations.