EPSCISSSetSizes#

Sets the values of various size parameters in the CISS solver.

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSCISSSetSizes(EPS eps,PetscInt ip,PetscInt bs,PetscInt ms,PetscInt npart,PetscInt bsmax,PetscBool realmats)

Logically Collective

Input Parameters#

  • eps - the linear eigensolver context

  • ip - number of integration points

  • bs - block size

  • ms - moment size

  • npart - number of partitions when splitting the communicator

  • bsmax - max block size

  • realmats - A and B are real

Options Database Keys#

  • -eps_ciss_integration_points - Sets the number of integration points

  • -eps_ciss_blocksize - Sets the block size

  • -eps_ciss_moments - Sets the moment size

  • -eps_ciss_partitions - Sets the number of partitions

  • -eps_ciss_maxblocksize - Sets the maximum block size

  • -eps_ciss_realmats - A and B are real

Note#

For all integer arguments, you can use PETSC_CURRENT to keep the current value, and PETSC_DETERMINE to set them to a default value.

The default number of partitions is 1. This means the internal KSP object is shared among all processes of the EPS communicator. Otherwise, the communicator is split into npart communicators, so that npart KSP solves proceed simultaneously.

See Also#

EPS: Eigenvalue Problem Solver, EPSCISSGetSizes()

Level#

advanced

Location#

src/eps/impls/ciss/ciss.c

Implementations#

EPSCISSSetSizes_CISS() in src/eps/impls/ciss/ciss.c

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