EPSKrylovSchurGetSubcommInfo#

Gets information related to the case of doing spectrum slicing for a computational interval with multiple communicators.

Synopsis#

#include "slepceps.h" 
PetscErrorCode EPSKrylovSchurGetSubcommInfo(EPS eps,PetscInt *k,PetscInt *n,Vec *v)

Collective on the subcommunicator (if v is given)

Input Parameter#

  • eps - the linear eigensolver context

Output Parameters#

  • k - index of the subinterval for the calling process

  • n - number of eigenvalues found in the k-th subinterval

  • v - a vector owned by processes in the subcommunicator with dimensions compatible for locally computed eigenvectors (or NULL)

Notes#

This function is only available for spectrum slicing runs, that is, when an interval has been given with EPSSetInterval() and STSINVERT is set. See more details in section Spectrum Slicing.

The returned Vec should be destroyed by the user.

See Also#

EPS: Eigenvalue Problem Solver, Spectrum Slicing, EPSKRYLOVSCHUR, EPSSetInterval(), EPSKrylovSchurSetPartitions(), EPSKrylovSchurGetSubcommPairs()

Level#

advanced

Location#

src/eps/impls/krylov/krylovschur/krylovschur.c

Implementations#

EPSKrylovSchurGetSubcommInfo_KrylovSchur() in src/eps/impls/krylov/krylovschur/krylovschur.c

Index of all EPS routines Table of Contents for all manual pages Index of all manual pages