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UID:submissions.pasc-conference.org_PASC21_sess182_post177@linklings.com
SUMMARY:P37 - A FLASH5 Orchestration System for Exposing and Capitalizing 
 on Hierarchies of Parallelism
DESCRIPTION:Poster\n\nP37 - A FLASH5 Orchestration System for Exposing and
  Capitalizing on Hierarchies of Parallelism\n\nDubey, O'Neal, Wahib, Weide
 \n\nFLASH5 is a highly-composable, multiscale, multiphysics software packa
 ge faced with a difficult transition to the next generation of high-perfor
 mance computing platforms with heterogeneous nodes. These platforms pose a
  significant challenge to running a wide variety of substantial problems w
 hile making efficient use of the underlying hardware.  Given that FLA
 SH5 is a large, complex code supporting many physics capabilities, refacto
 ring to each platform individually would be non-productive.  Therefor
 e, we have identified a strong need to find a futureproof, performance-por
 table solution that will allow us to evolve FLASH5 without sacrificing the
  quality or maintainability of the code.  In this poster, we will pre
 sent the design of a custom orchestration system that will allow FLASH5 to
  work on heterogenous nodes that follow the host-devices paradigm.  T
 he system is composed of several subsystems with intelligence distributed 
 across these so that no single subsystem is too complex or difficult to ma
 intain.  One subsystem is a runtime with a high-level interface that 
 exposes the hierarchy of parallelism of each platform and that manages dat
 a movements.  The design also includes an offline tool-chain that int
 erprets the hierarchy and maps computational tasks onto the exposed parall
 elism so that simulations can effectively exploit hardware resources.
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