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Aland, Sebastian
amdis
Commits
a41536c3
Commit
a41536c3
authored
Oct 26, 2012
by
Thomas Witkowski
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Merge to juropa
parent
0ca6954f
Changes
2
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2 changed files
with
133 additions
and
52 deletions
+133
-52
AMDiS/src/parallel/PetscSolverNavierStokes.cc
AMDiS/src/parallel/PetscSolverNavierStokes.cc
+129
-52
AMDiS/src/parallel/PetscSolverNavierStokes.h
AMDiS/src/parallel/PetscSolverNavierStokes.h
+4
-0
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AMDiS/src/parallel/PetscSolverNavierStokes.cc
View file @
a41536c3
...
...
@@ -18,6 +18,51 @@ namespace AMDiS {
using
namespace
std
;
PetscErrorCode
pcNs
(
PC
pc
,
Vec
x
,
Vec
y
)
{
void
*
ctx
;
PCShellGetContext
(
pc
,
&
ctx
);
MatShellNavierStokesSchur
*
data
=
static_cast
<
MatShellNavierStokesSchur
*>
(
ctx
);
Vec
velocity
,
pressure
;
VecGetSubVector
(
x
,
data
->
isVelocity
,
&
velocity
);
VecGetSubVector
(
x
,
data
->
isPressure
,
&
pressure
);
Vec
velocityTmp
;
VecDuplicate
(
velocity
,
&
velocityTmp
);
Vec
pressureTmp
;
VecDuplicate
(
pressure
,
&
pressureTmp
);
#if 0
MatMult(data->A01, pressure, velocityTmp);
VecAXPY(velocity, 1.0, velocityTmp);
KSPSolve(data->kspVelocity, velocity, velocity);
VecScale(pressure, -1.0);
#else
KSPSolve
(
data
->
kspVelocity
,
velocity
,
velocityTmp
);
MatMult
(
data
->
A10
,
velocityTmp
,
pressureTmp
);
VecAXPY
(
pressure
,
-
1.0
,
pressureTmp
);
KSPSolve
(
data
->
kspLaplace
,
pressure
,
pressure
);
MatMult
(
data
->
matConDif
,
pressure
,
pressureTmp
);
KSPSolve
(
data
->
kspMass
,
pressureTmp
,
pressure
);
MatMult
(
data
->
A01
,
pressure
,
velocityTmp
);
VecAXPY
(
velocity
,
-
1.0
,
velocityTmp
);
KSPSolve
(
data
->
kspVelocity
,
velocity
,
velocity
);
#endif
VecRestoreSubVector
(
x
,
data
->
isVelocity
,
&
velocity
);
VecRestoreSubVector
(
x
,
data
->
isPressure
,
&
pressure
);
VecCopy
(
x
,
y
);
VecDestroy
(
&
velocityTmp
);
VecDestroy
(
&
pressureTmp
);
}
int
petscMultNavierStokesSchur
(
Mat
mat
,
Vec
x
,
Vec
y
)
{
void
*
ctx
;
...
...
@@ -47,9 +92,10 @@ namespace AMDiS {
VecDuplicate
(
x
,
&
vec0
);
VecDuplicate
(
x
,
&
vec1
);
KSPSolve
(
data
->
kspLaplace
,
x
,
vec0
);
MatMult
(
data
->
matConDif
,
vec0
,
vec1
);
KSPSolve
(
data
->
kspMass
,
vec1
,
y
);
// KSPSolve(data->kspLaplace, x, vec0);
// MatMult(data->matConDif, vec0, vec1);
//KSPSolve(data->kspMass, vec0, y);
VecSet
(
y
,
0.0
);
VecDestroy
(
&
vec0
);
VecDestroy
(
&
vec1
);
...
...
@@ -114,57 +160,31 @@ namespace AMDiS {
{
FUNCNAME
(
"PetscSolverNavierStokes::initPreconditioner()"
);
vector
<
int
>
velocityComponents
;
velocityComponents
.
push_back
(
0
);
velocityComponents
.
push_back
(
1
);
PCSetType
(
pc
,
PCFIELDSPLIT
);
PCFieldSplitSetType
(
pc
,
PC_COMPOSITE_SCHUR
);
PCFieldSplitSetSchurFactType
(
pc
,
PC_FIELDSPLIT_SCHUR_FACT_FULL
);
createFieldSplit
(
pc
,
"velocity"
,
velocityComponents
);
createFieldSplit
(
pc
,
"pressure"
,
pressureComponent
);
KSPSetUp
(
kspInterior
);
KSP
*
subKsp
;
int
nSubKsp
;
PCFieldSplitGetSubKSP
(
pc
,
&
nSubKsp
,
&
subKsp
);
TEST_EXIT
(
nSubKsp
==
2
)
(
"Wrong numer of KSPs inside of the fieldsplit preconditioner!
\n
"
);
KSP
kspVelocity
=
subKsp
[
0
];
KSP
kspSchur
=
subKsp
[
1
];
PetscFree
(
subKsp
);
Mat
A00
,
A01
,
A10
,
A11
;
PCFieldSplitGetSchurBlocks
(
pc
,
&
A00
,
&
A01
,
&
A10
,
&
A11
);
matShellContext
.
A00
=
A00
;
matShellContext
.
A01
=
A01
;
matShellContext
.
A10
=
A10
;
matShellContext
.
A11
=
A11
;
matShellContext
.
kspVelocity
=
kspVelocity
;
Mat
matShell
;
MatDuplicate
(
A11
,
MAT_DO_NOT_COPY_VALUES
,
&
matShell
);
MatSetType
(
matShell
,
MATSHELL
);
MatShellSetContext
(
matShell
,
&
matShellContext
);
MatShellSetOperation
(
matShell
,
MATOP_MULT
,
(
void
(
*
)(
void
))
petscMultNavierStokesSchur
);
MatSetUp
(
matShell
);
KSPSetType
(
kspVelocity
,
KSPPREONLY
);
PCSetType
(
pc
,
PCSHELL
);
PCShellSetApply
(
pc
,
pcNs
);
PCShellSetContext
(
pc
,
&
matShellContext
);
interiorMap
->
createIndexSet
(
matShellContext
.
isVelocity
,
0
,
2
);
interiorMap
->
createIndexSet
(
matShellContext
.
isPressure
,
2
,
1
);
MatGetSubMatrix
(
getMatInterior
(),
matShellContext
.
isVelocity
,
matShellContext
.
isVelocity
,
MAT_INITIAL_MATRIX
,
&
matShellContext
.
A00
);
MatGetSubMatrix
(
getMatInterior
(),
matShellContext
.
isVelocity
,
matShellContext
.
isPressure
,
MAT_INITIAL_MATRIX
,
&
matShellContext
.
A01
);
MatGetSubMatrix
(
getMatInterior
(),
matShellContext
.
isPressure
,
matShellContext
.
isVelocity
,
MAT_INITIAL_MATRIX
,
&
matShellContext
.
A10
);
MatGetSubMatrix
(
getMatInterior
(),
matShellContext
.
isPressure
,
matShellContext
.
isPressure
,
MAT_INITIAL_MATRIX
,
&
matShellContext
.
A11
);
KSPCreate
(
mpiCommGlobal
,
&
(
matShellContext
.
kspVelocity
));
KSPSetOperators
(
matShellContext
.
kspVelocity
,
matShellContext
.
A00
,
matShellContext
.
A00
,
SAME_NONZERO_PATTERN
);
// KSPSetType(matShellContext.kspVelocity, KSPPREONLY);
KSPSetInitialGuessNonzero
(
matShellContext
.
kspVelocity
,
PETSC_TRUE
);
PC
pcSub
;
KSPGetPC
(
kspVelocity
,
&
pcSub
);
KSPGetPC
(
matShellContext
.
kspVelocity
,
&
pcSub
);
PCSetType
(
pcSub
,
PCLU
);
PCFactorSetMatSolverPackage
(
pcSub
,
MATSOLVERMUMPS
);
KSPSetType
(
kspSchur
,
KSPGMRES
);
KSPSetTolerances
(
kspSchur
,
0
,
1e-14
,
1e+3
,
1000
);
KSPSetOperators
(
kspSchur
,
matShell
,
matShell
,
SAME_NONZERO_PATTERN
);
KSPGetPC
(
kspSchur
,
&
pcSub
);
PCSetType
(
pcSub
,
PCNONE
);
// === Mass matrix solver ===
...
...
@@ -217,9 +237,9 @@ namespace AMDiS {
Simple_SOT
conDif1
(
nu
);
conDifOp
.
addTerm
(
&
conDif1
);
Vector_FOT
conDif2
(
0
);
//
conDifOp.addTerm(&conDif2, GRD_PHI);
conDifOp
.
addTerm
(
&
conDif2
,
GRD_PHI
);
Vector_FOT
conDif3
(
1
);
//
conDifOp.addTerm(&conDif3, GRD_PHI);
conDifOp
.
addTerm
(
&
conDif3
,
GRD_PHI
);
conDifMatrix
.
assembleOperator
(
conDifOp
);
...
...
@@ -232,6 +252,7 @@ namespace AMDiS {
matShellContext
.
kspLaplace
=
laplaceMatrixSolver
->
getSolver
();
matShellContext
.
matConDif
=
conDifMatrixSolver
->
getMatInterior
();
KSPSetType
(
matShellContext
.
kspMass
,
KSPRICHARDSON
);
KSPSetTolerances
(
matShellContext
.
kspMass
,
0
,
1e-13
,
1e+3
,
1
);
KSPGetPC
(
matShellContext
.
kspMass
,
&
pcSub
);
...
...
@@ -240,16 +261,72 @@ namespace AMDiS {
KSPSetFromOptions
(
matShellContext
.
kspMass
);
KSPSetType
(
matShellContext
.
kspLaplace
,
KSPCG
);
KSPSetInitialGuessNonzero
(
matShellContext
.
kspLaplace
,
PETSC_TRUE
);
KSPSetTolerances
(
matShellContext
.
kspLaplace
,
0
,
1e-13
,
1e+3
,
10000
);
KSPGetPC
(
matShellContext
.
kspLaplace
,
&
pcSub
);
PCSetType
(
pcSub
,
PCJACOBI
);
KSPSetFromOptions
(
matShellContext
.
kspLaplace
);
#if 0
vector<int> velocityComponents;
velocityComponents.push_back(0);
velocityComponents.push_back(1);
PCSetType(pc, PCFIELDSPLIT);
PCFieldSplitSetType(pc, PC_COMPOSITE_SCHUR);
PCFieldSplitSetSchurFactType(pc, PC_FIELDSPLIT_SCHUR_FACT_FULL);
createFieldSplit(pc, "velocity", velocityComponents);
createFieldSplit(pc, "pressure", pressureComponent);
KSPSetUp(kspInterior);
KSP *subKsp;
int nSubKsp;
PCFieldSplitGetSubKSP(pc, &nSubKsp, &subKsp);
TEST_EXIT(nSubKsp == 2)
("Wrong numer of KSPs inside of the fieldsplit preconditioner!\n");
KSP kspVelocity = subKsp[0];
KSP kspSchur = subKsp[1];
PetscFree(subKsp);
Mat A00, A01, A10, A11;
PCFieldSplitGetSchurBlocks(pc, &A00, &A01, &A10, &A11);
matShellContext.A00 = A00;
matShellContext.A01 = A01;
matShellContext.A10 = A10;
matShellContext.A11 = A11;
matShellContext.kspVelocity = kspVelocity;
Mat matShell;
MatDuplicate(A11, MAT_DO_NOT_COPY_VALUES, &matShell);
MatSetType(matShell, MATSHELL);
MatShellSetContext(matShell, &matShellContext);
MatShellSetOperation(matShell, MATOP_MULT, (void(*)(void))petscMultNavierStokesSchur);
KSPSetType(kspVelocity, KSPPREONLY);
PC pcSub;
KSPGetPC(kspVelocity, &pcSub);
PCSetType(pcSub, PCLU);
PCFactorSetMatSolverPackage(pcSub, MATSOLVERMUMPS);
KSPSetType(kspSchur, KSPGMRES);
KSPSetTolerances(kspSchur, 0, 1e-14, 1e+3, 1000);
KSPSetOperators(kspSchur, matShell, matShell, SAME_NONZERO_PATTERN);
KSPGetPC(kspSchur, &pcSub);
PCSetType(pcSub, PCNONE);
matShellContext.solverMode = 1;
KSPSetFromOptions(kspVelocity);
KSPSetFromOptions(kspSchur);
#endif
}
}
AMDiS/src/parallel/PetscSolverNavierStokes.h
View file @
a41536c3
...
...
@@ -44,6 +44,10 @@ namespace AMDiS {
KSP
kspMass
,
kspLaplace
;
Mat
matConDif
;
IS
isVelocity
,
isPressure
;
};
class
PetscSolverNavierStokes
:
public
PetscSolverGlobalMatrix
...
...
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