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Backofen, Rainer
amdis
Commits
2ffb4759
Commit
2ffb4759
authored
Jul 15, 2010
by
Thomas Witkowski
Browse files
Improved memory allocation for petsc matrix in the case of zero diagonal elements.
parent
3c9efbeb
Changes
1
Hide whitespace changes
Inline
Side-by-side
AMDiS/src/parallel/GlobalMatrixSolver.cc
View file @
2ffb4759
...
...
@@ -4,7 +4,7 @@
#include "DOFVector.h"
#include "Debug.h"
#include "SystemVector.h"
#include "VtkWriter.h"
#include "petscksp.h"
namespace
AMDiS
{
...
...
@@ -283,10 +283,10 @@ namespace AMDiS {
// Traverse all non zero entries in this row.
for
(
icursor_type
icursor
=
begin
<
nz
>
(
cursor
),
icend
=
end
<
nz
>
(
cursor
);
icursor
!=
icend
;
++
icursor
)
{
if
(
value
(
*
icursor
)
!=
0.0
)
{
int
petscColIdx
=
meshDistributor
->
mapLocalToGlobal
(
col
(
*
icursor
))
*
nComponents
+
j
;
int
petscColIdx
=
meshDistributor
->
mapLocalToGlobal
(
col
(
*
icursor
))
*
nComponents
+
j
;
if
(
value
(
*
icursor
)
!=
0.0
||
petscRowIdx
==
petscColIdx
)
{
// The row DOF is a rank DOF, if also the column is a rank DOF,
// increment the d_nnz values for this row, otherwise the o_nnz value.
if
(
petscColIdx
>=
meshDistributor
->
getRstart
()
*
nComponents
&&
...
...
@@ -445,6 +445,9 @@ namespace AMDiS {
MatAssemblyBegin
(
petscMatrix
,
MAT_FINAL_ASSEMBLY
);
MatAssemblyEnd
(
petscMatrix
,
MAT_FINAL_ASSEMBLY
);
#if (DEBUG != 0)
INFO
(
info
,
8
)(
"Fill petsc matrix 3 needed %.5f seconds
\n
"
,
TIME_USED
(
first
,
clock
()));
#endif
// === Transfer values from DOF vector to the PETSc vector. ===
...
...
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