petsc-3.7.7 2017-09-25
Report Typos and Errors

KSPGMRESSetPreAllocateVectors

 Causes GMRES and FGMRES to preallocate all its needed work vectors at initial setup rather than the default, which is to allocate them in chunks when needed.

Synopsis

#include "petscksp.h"  
PetscErrorCode  KSPGMRESSetPreAllocateVectors(KSP ksp)
Logically Collective on KSP

Input Parameter

ksp -iterative context obtained from KSPCreate

Options Database Key

-ksp_gmres_preallocate -Activates KSPGmresSetPreAllocateVectors()

Keywords

GMRES, preallocate, vectors

See Also

KSPGMRESSetRestart(), KSPGMRESSetOrthogonalization(), KSPGMRESGetOrthogonalization()

Level:intermediate
Location:src/ksp/ksp/impls/gmres/gmpre.c
Index of all KSP routines
Table of Contents for all manual pages
Index of all manual pages