petsc-3.7.5 2017-01-01
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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