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hypre_UnitTest.cpp
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42 
43 #include "Ifpack.h"
44 #include "Ifpack_Hypre.h"
45 #include "AztecOO.h"
46 #include "Galeri_Maps.h"
47 #include "Galeri_CrsMatrices.h"
48 #include "Galeri_Utils.h"
49 #include "Epetra_MultiVector.h"
50 
51 #include "Teuchos_UnitTestHarness.hpp"
52 #include "Teuchos_RCP.hpp"
53 #include "Epetra_ConfigDefs.h"
54 #include "Epetra_Vector.h"
55 #include "Epetra_RowMatrix.h"
56 #include "Epetra_MultiVector.h"
57 #include "Epetra_CrsMatrix.h"
58 #include "Epetra_Map.h"
59 #ifdef HAVE_MPI
60 #include "mpi.h"
61 #include "Epetra_MpiComm.h"
62 #else
63 #include "Epetra_SerialComm.h"
64 #endif
65 
66 #include "hypre_Helpers.hpp"
67 
68 #include "Teuchos_Array.hpp"
69 #include <string>
70 #include <stdio.h>
71 #include <map>
72 
73 using Teuchos::RCP;
74 using Teuchos::rcp;
75 
76 
77 // Tests hypre interface's ability to initialize correctly
78 TEUCHOS_UNIT_TEST( Ifpack_Hypre, Construct ) {
79  const int N = 10;
80 
81  Epetra_MpiComm comm(MPI_COMM_WORLD);
82  Epetra_Map RowMap(N, 0, comm);
83  Epetra_CrsMatrix Matrix(Copy, RowMap, 1);
84  for(int i = 0; i < N; i++){
85  int indices[1];
86  double values[1];
87  indices[0] = i;
88  values[0] = 1.0;
89  Matrix.InsertGlobalValues(i, 1, values, indices);
90  }
91  Matrix.FillComplete();
92  Ifpack_Hypre preconditioner(&Matrix);
93  int rv=preconditioner.Initialize();
94  TEST_EQUALITY(rv,0);
95 }
96 
97 
98 // Tests hypre's ability to work when A has a funky row map, but the vectors have
99 // a contiguous row map
100 TEUCHOS_UNIT_TEST( Ifpack_Hypre, ParameterList ){
101  const double tol = 1e-7;
102 
103  Epetra_MpiComm Comm(MPI_COMM_WORLD);
104 
105  Epetra_Map* Map;
106  // pointer to the matrix to be created
107  Epetra_CrsMatrix* Matrix;
108  // container for parameters
109  Teuchos::ParameterList GaleriList;
110  // here we specify the global dimension of the problem
111  int nx = 10 * Comm.NumProc();
112  int ny = 10 * Comm.NumProc();
113  GaleriList.set("nx", nx);
114  GaleriList.set("ny", ny);
115 
116  try
117  {
118  // Create the matrix
119  Map = Galeri::CreateMap("Cartesian2D", Comm, GaleriList);
120  Matrix = Galeri::CreateCrsMatrix("Biharmonic2D", Map, GaleriList);
121 
122  // Create the parameter list
123  Teuchos::ParameterList list("Preconditioner List");
124  Teuchos::ParameterList precList = list.sublist("hypre: Preconditioner functions");
125  precList.set("HYPRE_BoomerAMGSetPrintLevel", 1);// print amg solution info
126  precList.set("HYPRE_BoomerAMGSetCoarsenType", 6);
127  precList.set("HYPRE_BoomerAMGSetRelaxType", 6); //Sym G.S./Jacobi hybrid
128  precList.set("HYPRE_BoomerAMGSetNumSweeps", 1);
129  precList.set("HYPRE_BoomerAMGSetTol", 0.0); // conv. tolerance zero
130  precList.set("HYPRE_BoomerAMGSetMaxIter", 1); //do only one iteration!
131  list.set("hypre: Solver", "PCG");
132  list.set("hypre: Preconditioner", "BoomerAMG");
133  list.set("hypre: SolveOrPrecondition", "Solver");
134  list.set("hypre: SetPreconditioner", true);
135 
136  // Create the preconditioner
137  Ifpack_Hypre preconditioner(Matrix);
138  TEST_EQUALITY(preconditioner.SetParameters(list),0);
139  TEST_EQUALITY(preconditioner.Compute(),0);
140 
141  // Create the RHS and solution vector
142  int numVec = 2;
143  Epetra_MultiVector X(preconditioner.OperatorDomainMap(), numVec);
144  Epetra_MultiVector KnownX(preconditioner.OperatorDomainMap(), numVec);
145  TEST_EQUALITY(KnownX.Random(),0);
146  Epetra_MultiVector B(preconditioner.OperatorRangeMap(), numVec);
147  TEST_EQUALITY(preconditioner.Apply(KnownX, B),0);
148 
149  TEST_EQUALITY(preconditioner.ApplyInverse(B,X),0);
150  TEST_EQUALITY(EquivalentVectors(X, KnownX, tol*10*pow(10.0,Comm.NumProc())), true);
151 
152  //delete preconditioner;
153  delete Map;
154  delete Matrix;
155  }
156  catch (Galeri::Exception& rhs)
157  {
158  if (Comm.MyPID() == 0)
159  {
160  cerr << "Caught exception: ";
161  rhs.Print();
162  }
163  }
164 }
165 
166 
167 // Tests hypre's ability to work when A has a funky row map, but the vectors have
168 // a contiguous row map
169 TEUCHOS_UNIT_TEST( Ifpack_Hypre, ParameterList2 ){
170  const double tol = 1e-7;
171 
172  Epetra_MpiComm Comm(MPI_COMM_WORLD);
173 
174  Epetra_Map* Map;
175  // pointer to the matrix to be created
176  Epetra_CrsMatrix* Matrix;
177  // container for parameters
178  Teuchos::ParameterList GaleriList;
179  // here we specify the global dimension of the problem
180  int nx = 10 * Comm.NumProc();
181  int ny = 10 * Comm.NumProc();
182  GaleriList.set("nx", nx);
183  GaleriList.set("ny", ny);
184 
185  try
186  {
187  // Create the matrix
188  Map = Galeri::CreateMap("Cartesian2D", Comm, GaleriList);
189  Matrix = Galeri::CreateCrsMatrix("Biharmonic2D", Map, GaleriList);
190 
191  // Create the parameter list
192  Teuchos::ParameterList list("Preconditioner List");
193 
194  list.set("hypre: Solver", "PCG");
195  Teuchos::ParameterList solverList = list.sublist("hypre: Solver functions");
196  solverList.set("HYPRE_PCGSetMaxIter", 1000); // max iterations
197  solverList.set("HYPRE_PCGSetTol", tol); // conv. tolerance
198  solverList.set("HYPRE_PCGSetTwoNorm", 1); // use the two norm as the stopping criteria
199  solverList.set("HYPRE_PCGSetPrintLevel", 0); // print solve info
200  solverList.set("HYPRE_PCGSetLogging", 1); // needed to get run info later
201  list.set("hypre: Solver functions",solverList);
202 
203  list.set("hypre: Preconditioner", "BoomerAMG");
204  Teuchos::ParameterList precList = list.sublist("hypre: Preconditioner functions");
205  precList.set("HYPRE_BoomerAMGSetPrintLevel", 1);// print amg solution info
206  precList.set("HYPRE_BoomerAMGSetCoarsenType", 6);
207  precList.set("HYPRE_BoomerAMGSetRelaxType", 6); //Sym G.S./Jacobi hybrid
208  precList.set("HYPRE_BoomerAMGSetNumSweeps", 1);
209  precList.set("HYPRE_BoomerAMGSetTol", 0.0); // conv. tolerance zero
210  precList.set("HYPRE_BoomerAMGSetMaxIter", 1); //do only one iteration!
211  list.set("hypre: Preconditioner functions",precList);
212 
213  list.set("hypre: SolveOrPrecondition", "Solver");
214  list.set("hypre: SetPreconditioner", true);
215 
216  // Create the preconditioner
217  Ifpack_Hypre preconditioner(Matrix);
218  TEST_EQUALITY(preconditioner.SetParameters(list),0);
219  TEST_EQUALITY(preconditioner.Compute(),0);
220 
221  // Create the RHS and solution vector
222  int numVec = 2;
223  Epetra_MultiVector X(preconditioner.OperatorDomainMap(), numVec);
224  Epetra_MultiVector KnownX(preconditioner.OperatorDomainMap(), numVec);
225  TEST_EQUALITY(KnownX.Random(),0);
226  Epetra_MultiVector B(preconditioner.OperatorRangeMap(), numVec);
227  TEST_EQUALITY(preconditioner.Apply(KnownX, B),0);
228 
229  TEST_EQUALITY(preconditioner.ApplyInverse(B,X),0);
230  TEST_EQUALITY(EquivalentVectors(X, KnownX, tol*10*pow(10.0,Comm.NumProc())), true);
231 
232  //delete preconditioner;
233  delete Map;
234  delete Matrix;
235  }
236  catch (Galeri::Exception& rhs)
237  {
238  if (Comm.MyPID() == 0)
239  {
240  cerr << "Caught exception: ";
241  rhs.Print();
242  }
243  }
244 }
245 
246 
247 // Tests the hypre interface's ability to work with both a preconditioner and linear
248 // solver via ApplyInverse
249 TEUCHOS_UNIT_TEST( Ifpack_Hypre, Ifpack ){
250  const double tol = 1E-7;
251 
252  //
253  // Create Laplace2D with a contiguous row distribution
254  //
255  Epetra_CrsMatrix* Crs_Matrix = newCrsMatrix(4);
256 
257  //
258  // Create the hypre preconditioner
259  //
260  Ifpack Factory;
261  RCP<Ifpack_Preconditioner> preconditioner= rcp(Factory.Create("Hypre", Crs_Matrix));
262  int rv = preconditioner->Initialize();
263  TEST_EQUALITY(rv,0);
264  int NumProc = Crs_Matrix->Comm().NumProc();
265  int MyPID = Crs_Matrix->Comm().MyPID();
266 
267  //
268  // Create the solution vector and RHS
269  //
270  int numVec = 2;
271  Epetra_MultiVector X(preconditioner->OperatorRangeMap(), numVec);
272  Epetra_MultiVector KnownX(preconditioner->OperatorRangeMap(), numVec);
273  Epetra_MultiVector B(preconditioner->OperatorDomainMap(), numVec);
274  TEST_EQUALITY(KnownX.Random(), 0);
275  TEST_EQUALITY(preconditioner->Apply(KnownX, B), 0);
276 
277  Teuchos::ParameterList list("New List");
278  Teuchos::ParameterList & solverList = list.sublist("hypre: Solver functions");
279  solverList.set("HYPRE_PCGSetMaxIter", 1000); // max iterations
280  solverList.set("HYPRE_PCGSetTol", 1e-9); // conv. tolerance
281  solverList.set("HYPRE_PCGSetPrintLevel", 0); // print solve info
282  solverList.set("HYPRE_PCGSetLogging", 1); // needed to get run info later
283  list.set("hypre: Solver functions",solverList);
284  list.set("hypre: SolveOrPrecondition", "Solver");
285  list.set("hypre: Solver", "PCG");
286  list.set("hypre: Preconditioner", "ParaSails");
287  list.set("hypre: SetPreconditioner", true);
288  TEST_EQUALITY(preconditioner->SetParameters(list), 0);
289  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->SetParameter(Solver, PCG); // Use a PCG Solver
290  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->SetParameter(Preconditioner, ParaSails); // Use a ParaSails Preconditioner
291  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->SetParameter(Solver, &HYPRE_ParCSRPCGSetMaxIter, 1000); // Set maximum iterations
292  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->SetParameter(Solver, &HYPRE_ParCSRPCGSetTol, 1e-9); // Set a tolerance
293  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->SetParameter(Solver); // Solve the problem
294  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->SetParameter(true); // Use the preconditioner
295  TEST_EQUALITY(preconditioner->Compute(),0);
296  preconditioner->Condest(Ifpack_Cheap, 1000, 1e-9, Crs_Matrix);
297  TEST_EQUALITY(preconditioner->ApplyInverse(B, X),0);
298  TEST_EQUALITY(EquivalentVectors(X, KnownX, tol*10*pow(10.0,NumProc)), true);
299  int numIters;
300  double residual;
301  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->SetParameter(Solver, &HYPRE_ParCSRPCGGetNumIterations, &numIters);
302  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->SetParameter(Solver, &HYPRE_ParCSRPCGGetFinalRelativeResidualNorm, &residual);
303  (dynamic_cast<Ifpack_Hypre*> (preconditioner.get()))->CallFunctions();
304  if(MyPID == 0) printf("It took %d iterations, and achieved %e residual.\n", numIters, residual);
305  delete Crs_Matrix;
306 }
307 
308 
309 // This example uses contiguous maps, so hypre should not have problems
310 TEUCHOS_UNIT_TEST( Ifpack_Hypre, DiagonalMatrixInOrder ) {
311  Epetra_MpiComm comm(MPI_COMM_WORLD);
312  int numProcs = comm.NumProc();
313  int myRank = comm.MyPID();
314 
315  //
316  // Construct the contiguous map
317  //
318  Epetra_Map accMap(2*numProcs,0,comm);
319 
320  //
321  // Construct the diagonal matrix
322  //
323  Epetra_CrsMatrix accMat(Copy,accMap,2,true);
324  int col;
325  double val;
326  col = 2*myRank;
327  val = 2*myRank+1;
328  accMat.InsertGlobalValues(col,1,&val,&col);
329  col = 2*myRank+1;
330  val = 2*myRank+2;
331  accMat.InsertGlobalValues(col,1,&val,&col);
332  accMat.FillComplete();
333 
334  //
335  // Create the initial guess and RHS
336  //
337  int numVec = 2;
338  Epetra_MultiVector X(accMap, numVec);
339  Epetra_MultiVector KnownX(accMap, numVec);
340  KnownX.Random();
341  Epetra_MultiVector B(accMap, numVec);
342  accMat.Apply(KnownX, B);
343 
344  //
345  // Create the parameter list
346  //
347  const double tol = 1e-7;
348  Teuchos::ParameterList list("Preconditioner List");
349  Teuchos::ParameterList & solverList = list.sublist("hypre: Solver functions");
350  solverList.set("HYPRE_PCGSetMaxIter", 1000); // max iterations
351  solverList.set("HYPRE_PCGSetTol", tol); // conv. tolerance
352  solverList.set("HYPRE_PCGSetPrintLevel", 0); // print solve info
353  solverList.set("HYPRE_PCGSetLogging", 1); // needed to get run info later
354  list.set("hypre: Solver", "PCG");
355  list.set("hypre: SolveOrPrecondition", "Solver");
356  list.set("hypre: SetPreconditioner", false);
357 
358  //
359  // Create the preconditioner (which is actually a PCG solver)
360  //
361  Ifpack_Hypre prec(&accMat);
362  TEST_EQUALITY(prec.SetParameters(list),0);
363  TEST_EQUALITY(prec.Compute(),0);
364 
365  //
366  // Solve the linear system
367  //
368  TEST_EQUALITY(prec.ApplyInverse(B,X),0);
369 
370  TEST_EQUALITY(EquivalentVectors(X, KnownX, tol*10*pow(10.0,numProcs)), true);
371 }
372 
373 
374 // hypre does not like the distribution of the vectors in this example.
375 // Our interface should detect that and remap as necessary.
376 TEUCHOS_UNIT_TEST( Ifpack_Hypre, DiagonalMatrixOutOfOrder ) {
377  Epetra_MpiComm comm(MPI_COMM_WORLD);
378  int numProcs = comm.NumProc();
379  int myRank = comm.MyPID();
380 
381  //
382  // Construct the map [0 0 1 1]
383  // Note that the rows will be out of order
384  //
385  int elementList[2];
386  elementList[0] = 2*myRank+1;
387  elementList[1] = 2*myRank;
388  Epetra_Map ncMap(2*numProcs,2,elementList,0,comm);
389 
390  //
391  // Construct the diagonal matrix
392  //
393  Epetra_CrsMatrix accMat(Copy,ncMap,2,true);
394  int col;
395  double val;
396  col = 2*myRank+1;
397  val = 2*myRank+2;
398  accMat.InsertGlobalValues(col,1,&val,&col);
399  col = 2*myRank;
400  val = 2*myRank+1;
401  accMat.InsertGlobalValues(col,1,&val,&col);
402  accMat.FillComplete();
403 
404  //
405  // Create the parameter list
406  //
407  const double tol = 1e-7;
408  Teuchos::ParameterList list("Preconditioner List");
409  Teuchos::ParameterList & solverList = list.sublist("hypre: Solver functions");
410  solverList.set("HYPRE_PCGSetMaxIter", 1000); // max iterations
411  solverList.set("HYPRE_PCGSetTol", tol); // conv. tolerance
412  solverList.set("HYPRE_PCGSetTwoNorm", 1); // conv. tolerance
413  solverList.set("HYPRE_PCGSetPrintLevel", 2); // print solve info
414  solverList.set("HYPRE_PCGSetLogging", 1); // needed to get run info later
415  list.set("hypre: Solver", "PCG");
416  list.set("hypre: SolveOrPrecondition", "Solver");
417  list.set("hypre: SetPreconditioner", false);
418 
419 
420  //
421  // Create the preconditioner (which is actually a PCG solver)
422  //
423  Ifpack_Hypre prec(&accMat);
424  TEST_EQUALITY(prec.SetParameters(list),0);
425  TEST_EQUALITY(prec.Compute(),0);
426 
427  //
428  // Create the initial guess and RHS
429  // Note that these use non-contiguous maps
430  //
431  int numVec = 2;
432  Epetra_MultiVector X(ncMap, numVec);
433  Epetra_MultiVector KnownX(ncMap, numVec);
434  KnownX.Random();
435  Epetra_MultiVector B(ncMap, numVec);
436  accMat.Apply(KnownX, B);
437 
438  //
439  // Solve the linear system
440  //
441  TEST_EQUALITY(prec.ApplyInverse(B,X),0);
442 
443  TEST_EQUALITY(EquivalentVectors(X, KnownX, tol*10*pow(10.0,numProcs)), true);
444 }
445 
446 
447 
448 // Creates the identity matrix with a non-contiguous row map
449 // Even though the Epetra identity matrix has a map that hypre should not be happy with,
450 // hypre should be able to redistribute it. It should also be able to accept the
451 // vectors we give it, since they're using the same distribution as the hypre matrix.
452 // This tests hypre's ability to perform as a linear solver via ApplyInverse.
453 TEUCHOS_UNIT_TEST( Ifpack_Hypre, NonContiguousRowMap ) {
454 
455  Epetra_MpiComm comm(MPI_COMM_WORLD);
456  int numProcs = comm.NumProc();
457  int myRank = comm.MyPID();
458 
459  //
460  // Construct the map [0 1 0 1]
461  //
462  int elementList[2];
463  elementList[0] = myRank;
464  elementList[1] = myRank+numProcs;
465  Epetra_Map badMap(2*numProcs,2,elementList,0,comm);
466  Epetra_Map goodMap(2*numProcs,0,comm);
467 
468  //
469  // Construct the identity matrix
470  //
471  Epetra_CrsMatrix badMat(Copy,badMap,2,true);
472  int col;
473  double val = 1.0;
474  col = myRank;
475  badMat.InsertGlobalValues(col,1,&val,&col);
476  col = myRank+numProcs;
477  badMat.InsertGlobalValues(col,1,&val,&col);
478  badMat.FillComplete();
479 
480  //
481  // Create the parameter list
482  //
483  const double tol = 1e-7;
484  Teuchos::ParameterList list("Preconditioner List");
485  Teuchos::ParameterList & solverList = list.sublist("hypre: Solver functions");
486  solverList.set("HYPRE_PCGSetMaxIter", 1000); // max iterations
487  solverList.set("HYPRE_PCGSetTol", tol); // conv. tolerance
488  solverList.set("HYPRE_PCGSetTwoNorm", 1); // conv. tolerance
489  solverList.set("HYPRE_PCGSetPrintLevel", 2); // print solve info
490  solverList.set("HYPRE_PCGSetLogging", 1); // needed to get run info later
491  list.set("hypre: Solver", "PCG");
492  list.set("hypre: SolveOrPrecondition", "Solver");
493  list.set("hypre: SetPreconditioner", false);
494 
495  //
496  // Create the preconditioner (which is actually a PCG solver)
497  //
498  Ifpack_Hypre prec(&badMat);
499  TEST_EQUALITY(prec.SetParameters(list),0);
500  TEST_EQUALITY(prec.Compute(),0);
501 
502  //
503  // Create the initial guess and RHS
504  //
505  int numVec = 2;
506  Epetra_MultiVector X(goodMap, numVec);
507  Epetra_MultiVector RHS(goodMap, numVec);
508  RHS.Random();
509 
510  //
511  // Solve the linear system
512  //
513  TEST_EQUALITY(prec.ApplyInverse(RHS,X),0);
514 
515  TEST_EQUALITY(EquivalentVectors(X, RHS, tol*10*pow(10.0,numProcs)), true);
516 }
Epetra_MultiVector
Ifpack_Preconditioner::Condest
virtual double Condest(const Ifpack_CondestType CT=Ifpack_Cheap, const int MaxIters=1550, const double Tol=1e-9, Epetra_RowMatrix *Matrix=0)=0
Computes the condition number estimate, returns its value.
Epetra_Map
Preconditioner
ParaSails
Epetra_CrsMatrix::InsertGlobalValues
virtual int InsertGlobalValues(int GlobalRow, int NumEntries, const double *Values, const int *Indices)
Epetra_CrsMatrix::Apply
int Apply(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const
Epetra_MpiComm::NumProc
int NumProc() const
EquivalentVectors
bool EquivalentVectors(Epetra_MultiVector &Y1, Epetra_MultiVector &Y2, const double tol)
Definition: hypre_Helpers.cpp:165
Teuchos::ParameterList::sublist
RCP< ParameterList > sublist(const RCP< ParameterList > &paramList, const std::string &name, bool mustAlreadyExist=false, const std::string &docString="")
Teuchos::RCP::get
T * get() const
Epetra_Operator::OperatorDomainMap
virtual const Epetra_Map & OperatorDomainMap() const =0
Teuchos::ParameterList::set
ParameterList & set(std::string const &name, T &&value, std::string const &docString="", RCP< const ParameterEntryValidator > const &validator=null)
Epetra_MpiComm
Ifpack_Preconditioner::Initialize
virtual int Initialize()=0
Computes all it is necessary to initialize the preconditioner.
Epetra_Comm::MyPID
virtual int MyPID() const =0
Epetra_CrsMatrix::FillComplete
int FillComplete(bool OptimizeDataStorage=true)
Solver
static bool Solver
Definition: performance.cpp:70
Ifpack_Hypre.h
Epetra_Operator::Apply
virtual int Apply(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const =0
Epetra_Operator::OperatorRangeMap
virtual const Epetra_Map & OperatorRangeMap() const =0
Ifpack_Preconditioner::SetParameters
virtual int SetParameters(Teuchos::ParameterList &List)=0
Sets all parameters for the preconditioner.
Teuchos::rcp
TEUCHOS_DEPRECATED RCP< T > rcp(T *p, Dealloc_T dealloc, bool owns_mem)
tol
const double tol
Definition: LL/hypre_UnitTest.cpp:75
hypre_Helpers.hpp
Ifpack_Preconditioner::ApplyInverse
virtual int ApplyInverse(const Epetra_MultiVector &X, Epetra_MultiVector &Y) const =0
Applies the preconditioner to vector X, returns the result in Y.
Epetra_CrsMatrix::Print
virtual void Print(std::ostream &os) const
TEUCHOS_UNIT_TEST
TEUCHOS_UNIT_TEST(Ifpack_Hypre, Construct)
Definition: hypre_UnitTest.cpp:78
N
const int N
Definition: LL/hypre_UnitTest.cpp:73
Ifpack_Cheap
cheap estimate
Definition: Ifpack_CondestType.h:55
Epetra_Comm::NumProc
virtual int NumProc() const =0
Ifpack
Ifpack: a function class to define Ifpack preconditioners.
Definition: Ifpack.h:144
Ifpack::Create
static Ifpack_Preconditioner * Create(EPrecType PrecType, Epetra_RowMatrix *Matrix, const int overlap=0, bool overrideSerialDefault=false)
Creates an instance of Ifpack_Preconditioner given the enum value of the preconditioner type (can not...
Definition: Ifpack.cpp:253
Epetra_CrsMatrix
PCG
Ifpack_Preconditioner::Compute
virtual int Compute()=0
Computes all it is necessary to apply the preconditioner.
TEST_EQUALITY
#define TEST_EQUALITY(v1, v2)
newCrsMatrix
Epetra_CrsMatrix * newCrsMatrix(int N)
Definition: hypre_Helpers.cpp:120
Epetra_CrsMatrix::Comm
const Epetra_Comm & Comm() const
Epetra_MpiComm::MyPID
int MyPID() const
RHS
#define RHS(a)
Definition: MatGenFD.c:60
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