MatSNESMFWPSetComputeNormA
Sets whether it computes the ||a|| used by the WP PETSc routine for computing h. With GMRES since the ||a|| is always one, you can save communication by setting this to false.
Synopsis
#include "petscsnes.h"
PetscErrorCode MatSNESMFWPSetComputeNormA(Mat A,PetscTruth flag)
Input Parameters
Options Database Key
-snes_mf_compute_norma <true,false> -can be set false for GMRES to speed up code
Notes
See the manual page for MatCreateSNESMF() for a complete description of the
algorithm used to compute h.
See Also
MatSNESMFSetFunctionError(), MatCreateSNESMF()
Level:advanced
Location:src/snes/mf/wp.c
Index of all SNESMF routines
Table of Contents for all manual pages
Index of all manual pages