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The Largest LHC Event Generation Jobs Ever Run

Thomas LeCompte and Taylor Childers put supercomputers to work for Energy Frontier experiments by running LHC event generation at massively parallel scales on Mira, the supercomputer hosted by Argonne‘s Leadership Computing FacilityMPI (Message Passing Interface) was used to make Alpgen, a leading-order event generator, run in parallel threads. This work used a discretionary computing allocation on Mira to start the process of scaling to the minimum job size on Mira (512-computing nodes). An ASCR Leadership Computing Challenge award of 50M core-hours on Mira enabled the production of ATLAS event generation samples in preparation for Run-II.

1.5M threads of Alpgen running on Mira for 10 minutes to produce 85M W+5jet events.
1.5M threads of Alpgen running on Mira for 10 minutes to produce 85M W+5jet events