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Efficient high performance computing with the ALICE Event Processing Nodes GPU-based farm

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arxiv 2412.13755 v1 pith:AKS4KJPQ submitted 2024-12-18 hep-ex

Efficient high performance computing with the ALICE Event Processing Nodes GPU-based farm

classification hep-ex
keywords dataefficientprocessingaliceonlinecomputingenergyevent
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Due to the increase of data volumes expected for the LHC Run 3 and Run 4, the ALICE Collaboration designed and deployed a new, energy efficient, computing model to run Online and Offline O$^2$ data processing within a single software framework. The ALICE O$^2$ Event Processing Nodes (EPN) project performs online data reconstruction using GPUs (Graphic Processing Units) instead of CPUs and applies an efficient, entropy-based, online data compression to cope with PbPb collision data at a 50 kHz hadronic interaction rate. Also, the O$^2$ EPN farm infrastructure features an energy efficient, environmentally friendly, adiabatic cooling system which allows for operational and capital cost savings.

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