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DTSTAMP:20250822T115810Z
LOCATION:Room 5.0B56
DTSTART;TZID=Europe/Stockholm:20250618T140000
DTEND;TZID=Europe/Stockholm:20250618T143000
UID:submissions.pasc-conference.org_PASC25_sess140_msa149@linklings.com
SUMMARY:Porting High Energy Physics Simulation Workflows Across US DOE HPC
  Facilities
DESCRIPTION:Ozgur Ozan Kilic (Brookhaven National Laboratory)\n\nHigh Ener
 gy Physics (HEP) experiments, like ATLAS and DUNE, generate massive amount
 s of data requiring advanced simulation and data processing workflows. The
  increasing computational needs have necessitated the exploration of runni
 ng these workflows on  leadership-class HPC facilities (Perlmutter, Polari
 s, Frontier). However, the transition presents significant portability cha
 llenges, because each facility is unique with their architecture and softw
 are stacks. This talk explores strategies and tools for achieving cross-fa
 cility portability of large-scale HEP workflows, using DUNE and ATLAS simu
 lation workflows as examples. Our main focus is on understanding how to co
 ordinate emerging standards coming from various facility-specific APIs (e.
 g., Superfacility API, Globus Compute and others). Additionally, we examin
 e detailed portability issues arising from heterogeneous CPU/GPU architect
 ures, diverse library dependencies, varying shared file systems to underst
 and possible solutions for sustainable workflow. Our experiences highlight
 ed various portability challenges and revealed the need for closer collabo
 ration between HEP application developers, HPC centers, and broader softwa
 re communities. This study also underlines the crucial role of the Integra
 ted Research Infrastructure (IRI), the development of which can benefit gr
 eatly from experiences of HEP workflows.\n\nDomain: Physics\n\nSession Cha
 ir: Ozgur Ozan Kilic (Brookhaven National Laboratory)\n\n
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