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BEGIN:VEVENT
DTSTAMP:20210916T132449Z
LOCATION:Lise Girardin
DTSTART;TZID=Europe/Stockholm:20210706T113000
DTEND;TZID=Europe/Stockholm:20210706T120000
UID:submissions.pasc-conference.org_PASC21_sess124_msa239@linklings.com
SUMMARY:How to Prepare the GYSELA Gyrokinetic Code to Future Exascale Edge
 -Core Simulations
DESCRIPTION:Minisymposium\n\nHow to Prepare the GYSELA Gyrokinetic Code to
  Future Exascale Edge-Core Simulations\n\nGrandgirard, Asahi, Bigot, Bourn
 e, Dif-Pradalier...\n\nUnderstanding turbulence and heat transport in fusi
 on plasmas is a key challenge for future fusion devices like ITER. Core tr
 ansport modelling in tokamak plasmas has now reached maturity with non-lin
 ear 5D gyrokinetic codes in the world available to address this issue. How
 ever, despite numerous successes, their predictive capabilities are still 
 challenged, especially for optimized discharges. Bridging this gap require
 s extending gyrokinetic modelling in the edge and close to the material bo
 undaries, preferably addressing edge and core transport on an equal footin
 g. This is one of the long term challenges for the petascale code GYSELA [
 V. Grandgirard et al., CPC 2017 (35)]. Edge-core turbulent plasma simulati
 ons with kinetic electrons will require exascale HPC capabilities. We pres
 ent here the different strategies that we are currently exploring to targe
 t the disruptive use of billions of computing cores expected in exascale-c
 lass supercomputer as OpenMP4.5 tasks for overlapping computations and MPI
  communications, KOKKOS for performant portability programming and code re
 factoring.\n\nDomain: CS and Math, Physics
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