Scalable plasma simulation with ELMFIRE using efficient data structures for process communication

Artur Signell, F Ogando, Mats Aspnäs, Jan Westerholm

Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

1 Sitaatiot (Scopus)

Abstrakti

We describe the parallel full-f gyrokinetic particle-in-cell plasma simulation code ELMFIRE and the issue of solving an electrostatic potential from particle data distributed across several MPI (Message Passing Interface) processes. The potential is solved through a linear system with a strongly sparse matrix and ELMFIRE stores data of the estimated non-zero diagonals of the whole matrix in every MPI process. We present and compare several memory efficient structures for gathering the matrix data while keeping only a local part of the matrix in each process. We also demonstrate that these alternative structures improve scalability, thus enabling ELMFIRE to use more MPI processes and a finer time and space scale than before without sacrificing performance. (C) 2008 Elsevier B.V. All rights reserved.
AlkuperäiskieliEi tiedossa
Sivut330–338
Sivumäärä9
JulkaisuComputer Physics Communications
Vuosikerta179
Numero5
DOI - pysyväislinkit
TilaJulkaistu - 2008
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Keywords

  • full-f
  • gyrokinetics
  • matrix assembly
  • plasma simulation
  • sparse matrix

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