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DTSTAMP:20190719T085745Z
LOCATION:HG F 3
DTSTART;TZID=Europe/Stockholm:20190614T143000
DTEND;TZID=Europe/Stockholm:20190614T150000
UID:submissions.pasc-conference.org_PASC19_sess146_msa247@linklings.com
SUMMARY:Rearchitecting FLASH for Exascale
DESCRIPTION:Minisymposium\nComputer Science and Applied Mathematics, Physi
 cs\n\nRearchitecting FLASH for Exascale\n\nO'Neal, Dubey, Weide, Chawdhary
 \n\nFLASH is a highly-configurable multiphysics code that allows users to 
 run a large class of simulations involving fluid flow and to leverage adap
 tive mesh refinement to achieve their goals.  FLASH has already under
 gone four major revisions and is presently being updated and rearchitected
  to meet the demands of running simulations on heterogenous nodes without 
 sacrificing portability and maintainability.   One major effort assoc
 iated with this work has been to integrate in FLASH the AMReX library as a
 n additional implementation of the mesh unit, which will allow FLASH to be
 nefit potentially from AMReX features such as phase-asynchronous smart ite
 rators.  Another goal of this upgrade is to allow for the insertion o
 f an abstraction layer that will allow CPUs to orchestrate explicitly data
  movement and offloading of compute-intensive work to accelerators.  
 It is our intent that this layer be built into simulations though the comp
 osability of FLASH to achieve performance portability.  In this prese
 ntation, we will discuss the progression of adaptations that have already 
 been made to FLASH and those that are planned for the future to help FLASH
  move toward more effective use of both asynchrony and the heterogenous ha
 rdware of current and future platforms.
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