petsc-3.9.4 2018-09-11
MatPreallocateFinalize
Ends the block of code that will count the number of nonzeros per row in a matrix providing the data that one can use to correctly preallocate the matrix.
Synopsis
#include <petscmat.h>
PetscErrorCode MatPreallocateFinalize(PetscInt *dnz, PetscInt *onz)
Collective on MPI_Comm
Input Parameters
| dnz | - the array that was be passed to the matrix preallocation routines
|
| onz | - the other array passed to the matrix preallocation routines
|
Notes
See Users-Manual: Chapter 14 Hints for Performance Tuning for more details.
Do not malloc or free dnz and onz that is handled internally by these routines
This is a MACRO not a function because it closes the { started in MatPreallocateInitialize().
See Also
MatPreallocateInitialize(), MatPreallocateSet(), MatPreallocateSymmetricSetBlock(), MatPreallocateSetLocal(),
MatPreallocateSymmetricSetLocalBlock()
Level
intermediate
Location
src/mat/../../include/petscmat.h
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages