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UID:submissions.supercomputing.org_SC24_sess533_post149@linklings.com
SUMMARY:ORCHA: A Performance Portability System for Flash-X — A Multiphysi
 cs Application Software
DESCRIPTION:Youngjun Lee and Wesley Kwiecinski (Argonne National Laborator
 y (ANL)); Klaus Weide (Argonne National Laboratory (ANL), University of Ch
 icago); Johann Rudi (Virginia Tech); Jared O’Neal (Argonne National Labora
 tory (ANL)); Emil Vatai and Mohamed Wahib (RIKEN); and Tom Klosterman and 
 Anshu Dubey (Argonne National Laboratory (ANL))\n\nHeterogeneous platforms
  demand tailored data structures, algorithm mappings, and efficient execut
 ion, often leading to numerous, hard-to-maintain variants of source codes.
  ORCHA, our performance portability orchestration system, addresses these 
 challenges through abstractions and code generation, streamlining applicat
 ion development across diverse hardware.\n\nDesigned to adapt the FLASH mu
 ltiphysics software for heterogeneous HPC platforms, ORCHA reduces code du
 plication and maintenance burdens by separating data management and parall
 elism from arithmetic logic. Key tools include CG-Kit for optimizing imple
 mentations, a macroprocessor for flexible arithmetic specialization, and M
 ilhoja, a runtime for efficient graph execution.\n\nThis poster highlights
  performance evaluations of a shock hydrodynamics application across vario
 us hardware configurations, showcasing significant GPU performance improve
 ments with ORCHA. We will also outline ongoing efforts to extend ORCHA's c
 ompatibility to other physics solvers, aiming to provide broader flexibili
 ty and enhanced performance in diverse computational environments.\n\nRegi
 stration Category: Tech Program Reg Pass, Exhibits Reg Pass\n\nSession Cha
 irs: Ayesha Afzal (Friedrich-Alexander University, Erlangen-Nuremberg; Erl
 angen National High Performance Computing Center); Sally Ellingson (Univer
 sity of Kentucky); and Alan Sussman (University of Maryland)\n\n
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