PEPCISSSetSizes#

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

Synopsis#

#include "slepcpep.h" 
PetscErrorCode PEPCISSSetSizes(PEP pep,PetscInt ip,PetscInt bs,PetscInt ms,PetscInt npart,PetscInt bsmax,PetscBool realmats)

Logically Collective

Input Parameters#

  • pep - the polynomial 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 - all coefficient matrices of \(P(\cdot)\) are real

Options Database Keys#

  • -pep_ciss_integration_points <ip> - sets the number of integration points

  • -pep_ciss_blocksize <bs> - sets the block size

  • -pep_ciss_moments <ms> - sets the moment size

  • -pep_ciss_partitions <npart> - sets the number of partitions

  • -pep_ciss_maxblocksize <bsmax> - sets the maximum block size

  • -pep_ciss_realmats - all coefficient matrices of \(P(\cdot)\) are real

Notes#

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 PEP communicator. Otherwise, the communicator is split into npart communicators, so that npart KSP solves proceed simultaneously.

For a detailed description of the parameters see [Maeda et al., 2016].

References#

[Mae16]

Y. Maeda, T. Sakurai, and J. E. Roman. Contour integral spectrum slicing method in SLEPc. Technical Report STR-11, Universitat Politècnica de València, 2016. URL: https://slepc.upv.es/documentation.

See Also#

PEP: Polynomial Eigenvalue Problems, PEPCISS, PEPCISSGetSizes()

Level#

advanced

Location#

src/pep/impls/ciss/pciss.c

Implementations#

PEPCISSSetSizes_CISS() in src/pep/impls/ciss/pciss.c

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