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

Artur Signell, F Ogando, Mats Aspnäs, Jan Westerholm

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1 Citeringar (Scopus)

Sammanfattning

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.
OriginalspråkOdefinierat/okänt
Sidor (från-till)330–338
Antal sidor9
TidskriftComputer Physics Communications
Volym179
Utgåva5
DOI
StatusPublicerad - 2008
MoE-publikationstypA1 Tidskriftsartikel-refererad

Nyckelord

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

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