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October 8, 2025Open Access

Madgraph on GPUs and vector CPUs: Towards production. The 5-year journey to the first LO release CUDACPP v1.00.00

AVA. ValassiUniversité Paris-Sud JCJ. T. ChildersArgonne National Laboratory SHStephan HageboeckUniversity of Bonn

Key Points

The first production release of Madgraph's LO process code is achieved in October 2024, showcasing significant progress.
Key developments include new features, as well as extensive testing and fixes completed to enhance performance.
Active collaboration with the CMS experiment contributed vital feedback throughout the five-year development journey.
The release marks a milestone in optimizing Madgraph through the strategic use of GPUs and CPU vectorization.

Abstract

The effort to speed up the Madgraph5ₐMC@NLO generator by exploiting CPU vectorization and GPUs, which started at the beginning of 2020, has delivered the first production release of the code for leading-order (LO) processes in October 2024. To achieve this goal, many new features, tests and fixes have been implemented in recent months. This process benefitted also from the early feedback of the CMS experiment. In this contribution, we report on these activities and on the status of the LO software at the time of CHEP2024.

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