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

Madgraph5_aMC@NLO on GPUs and vector CPUs: experience with the first alpha release

May 8, 2023, 2:15 PM
Marriott Ballroom VII (Norfolk Waterside Marriott)

Marriott Ballroom VII

Norfolk Waterside Marriott

235 East Main Street Norfolk, VA 23510


Hageboeck, Stephan


Madgraph5_aMC@NLO is one of the workhorses for Monte Carlo event generation in the LHC experiments and an important consumer of compute resources. The software has been reengineered to maintain the overall look-and-feel of the user interface while achieving very large overall speedups. The computationally intensive part (the calculation of "matrix elements") is offloaded to new implementations optimized for GPUs and for vector CPUs, using event-level data parallelism. In this contribution, we will report on the first experience with the alpha release of the software supporting leading-order QCD processes. The achieved performance speedups and the potential for further improvements will be discussed in detail.

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