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DTSTAMP:20220812T074334Z
LOCATION:Foyer 2nd Floor
DTSTART;TZID=Europe/Stockholm:20220628T090000
DTEND;TZID=Europe/Stockholm:20220628T110000
UID:submissions.pasc-conference.org_PASC22_sess181_pos142@linklings.com
SUMMARY:P49 - Hybrid Parallelization for the Fully Spectral CFD Framework 
 QuICC
DESCRIPTION:Poster\n\nP49 - Hybrid Parallelization for the Fully Spectral 
 CFD Framework QuICC\n\nMarti, Castiglioni, Tolmachev, Ganellari, Jackson\n
 \nOur CFD framework QuICC, based on a fully spectral method, has been succ
 essfully used for various dynamo simulations in a spherical geometry. It r
 uns efficiently on a few thousands of cores using a 2D data distribution b
 ased on a distributed memory paradigm (MPI). The implicit treatment of the
  Coriolis force is an important feature of QuICC and it is critical to red
 uce the time to solution. However, it requires solving large sparse system
 s at each time step. In order to better harness the computing power of cur
 rent and upcoming HPC systems, which are increasingly based on heterogeneo
 us nodes built from multi-core processors and accelerators (GPU), we prese
 nt our work on refactoring the framework to introduce a hybrid distributed
  and shared memory parallelization (MPI + X). The interplay between the da
 ta flow of the sparse direct solver and the spectral transforms needed for
  the nonlinear computations requires a careful design of the parallelizati
 on. Different strategies will be presented.
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