/// <summary>
/// copies
/// </summary>
/// <typeparam name="vectype"></typeparam>
/// <param name="vec"></param>
public void GetValues <vectype>(vectype vec)
where vectype : IList <double>
{
int Nupdate = m_VectorPartition.LocalLength;
int i0 = (int)m_VectorPartition.i0;
int nvalues = Math.Min(1024, Nupdate);
int[] indices = new int[nvalues];
double[] values = new double[nvalues];
for (int i = 0; i < Nupdate; i += nvalues)
{
if (i + nvalues > Nupdate)
{
nvalues = Nupdate - i;
}
for (int ii = 0; ii < nvalues; ii++)
{
indices[ii] = i + ii + i0;
}
HypreException.Check(Wrappers.IJVector.GetValues(m_IJVector, nvalues, indices, values));
for (int ii = 0; ii < nvalues; ii++)
{
vec[i + ii] = values[ii];
}
}
}
/// <summary>
/// general matrix/vector product; see <see cref="ISparseMatrix.SpMV"/>;
/// </summary>
/// <typeparam name="VectorType1"></typeparam>
/// <typeparam name="VectorType2"></typeparam>
/// <param name="alpha"></param>
/// <param name="a"></param>
/// <param name="beta"></param>
/// <param name="acc"></param>
public void SpMV <VectorType1, VectorType2>(double alpha, VectorType1 a, double beta, VectorType2 acc)
where VectorType1 : System.Collections.Generic.IList <double>
where VectorType2 : System.Collections.Generic.IList <double>
{
if (a.Count < ColPartition.LocalLength)
{
throw new ArgumentException("length/count of 'a' must be equal to local length of column partition", "a");
}
if (acc.Count < RowPartitioning.LocalLength)
{
throw new ArgumentException("length/count of 'acc' must be greater or equal to local length of row partition", "acc");
}
if (object.ReferenceEquals(a, acc))
{
throw new ArgumentException("in-place computation is not supported.", "a,acc");
}
IJVector _acc = new IJVector(RowPartitioning);
if (beta != 0.0)
{
_acc.SetValues(acc);
}
IJVector _a = new IJVector(ColPartition);
_a.SetValues(a);
HypreException.Check(Wrappers.ParCSRMatrix.ParCSRMatrixMatvec(alpha, m_ParCSR_matrix, _a.ParCRS_vector, beta, _acc.ParCRS_vector));
_acc.GetValues(acc);
_acc.Dispose();
_a.Dispose();
}
/// <summary>
/// calls the PCG solver
/// </summary>
/// <param name="Converged">true if converged</param>
/// <param name="NoOfIter">no of iterations done by solver</param>
/// <param name="Unknowns"></param>
/// <param name="Rhs"></param>
protected override void CallSolver(out int NoOfIter, out bool Converged, IJVector Unknowns, IJVector Rhs)
{
if (m_Solver.p == IntPtr.Zero)
{
throw new ApplicationException("solver not initialized");
}
HypreException.Check(Wrappers.PCG.Setup(m_Solver, m_Matrix.m_ParCSR_matrix, Rhs.ParCRS_vector, Unknowns.ParCRS_vector));
Wrappers.PCG.Solve(m_Solver, m_Matrix.m_ParCSR_matrix, Rhs.ParCRS_vector, Unknowns.ParCRS_vector);
// We don't want to raise an exception for
// a 'method did not converge'- or 'numerical breakdown' - Error
// that may occur in HYPRE
Wrappers.Utilities.HYPRE_ClearAllErrors();
int Con;
HypreException.Check(Wrappers.PCG.GetConverged(m_Solver, out Con));
if (Con != 0)
{
Converged = true;
}
else
{
Converged = false;
}
HypreException.Check(Wrappers.PCG.GetNumIterations(m_Solver, out NoOfIter));
}
/// <summary>
/// see <see cref="IMutableMatrix.SetValues"/>
/// </summary>
public void SetValues(int RowIndex, int[] ColumnIndices, double[] newValues)
{
if (RowIndex < this.RowPartitioning.i0 || RowIndex >= (this.RowPartitioning.i0 + this.RowPartitioning.LocalLength))
{
throw new ArgumentOutOfRangeException("RowIndex", "row index not within local range");
}
HypreException.Check(Wrappers.IJMatrix.SetValues(m_IJMatrix, 1, new int[] { ColumnIndices.Length }, new int[] { RowIndex }, ColumnIndices, newValues));
}
/// <summary>
/// destroys the HYPRE object, if not allready done;
/// </summary>
public override void Dispose()
{
if (m_Solver.p != IntPtr.Zero)
{
HypreException.Check(Wrappers.BoomerAMG.HYPRE_BoomerAMGDestroy(m_Solver));
m_Solver.p = IntPtr.Zero;
}
base.Dispose();
}
/// <summary>
///
/// </summary>
protected override void CreateSolver()
{
HypreException.Check(Wrappers.BoomerAMG.HYPRE_BoomerAMGCreate(out m_Solver));
if (m_Solver.p == IntPtr.Zero)
{
throw new ApplicationException("Solver initialization failed");
}
PrintLevel = 0;
}
/// <summary>
/// destroy the hypre objects, if not allready done
/// </summary>
public void Dispose()
{
if (m_IJVector.p != IntPtr.Zero)
{
HypreException.Check(Wrappers.IJVector.Destroy(m_IJVector));
m_IJVector.p = IntPtr.Zero;
ParCRS_vector.p = IntPtr.Zero;
}
}
/// <summary>
/// destroys the HYPRE object, if not already done;
/// </summary>
public override void Dispose()
{
if (m_Solver.p != IntPtr.Zero)
{
HypreException.Check(Wrappers.ParCSRGMRES.Destroy(m_Solver));
m_Solver.p = IntPtr.Zero;
}
base.Dispose();
}
/// <summary>
/// destroys the native ParaSails object
/// </summary>
public override void Dispose()
{
base.Dispose();
if (m_Solver.p != IntPtr.Zero)
{
HypreException.Check(Wrappers.ParaSails.HYPRE_ParaSailsDestroy(m_Solver));
m_Solver.p = IntPtr.Zero;
}
}
/// <summary>
/// constructs and initializes a new HYPRE_IJVector object
/// </summary>
/// <param name="partition">distribution of the vector over MPI processes</param>
public IJVector(IPartitioning partition)
{
if (partition.IsMutable)
{
throw new NotSupportedException();
}
if (partition.TotalLength > (int.MaxValue - 2))
{
throw new ApplicationException("unable to create HYPRE vector: no. of matrix rows is larger than HYPRE index type (32 bit signed int);");
}
m_VectorPartition = partition;
int jLower = (int)partition.i0;
int jUpper = (int)partition.i0 + partition.LocalLength - 1;
MPI_Comm comm = csMPI.Raw._COMM.WORLD;
int Nupdate = partition.LocalLength;
// create object
HypreException.Check(Wrappers.IJVector.Create(comm, jLower, jUpper, out m_IJVector));
HypreException.Check(Wrappers.IJVector.SetObjectType(m_IJVector, Wrappers.Constants.HYPRE_PARCSR));
HypreException.Check(Wrappers.IJVector.Initialize(m_IJVector));
// set values
int nvalues = Math.Min(1024, Nupdate);
int[] indices = new int[nvalues];
double[] values = new double[nvalues];
int i0 = (int)m_VectorPartition.i0;
for (int i = 0; i < Nupdate; i += nvalues)
{
if (i + nvalues > Nupdate)
{
nvalues = Nupdate - i;
}
for (int ii = 0; ii < nvalues; ii++)
{
indices[ii] = i + ii + i0;
//if (vec == null)
// values[ii] = mapping[i_ii];
//else
// values[ii] = vec[i_ii];
}
HypreException.Check(Wrappers.IJVector.SetValues(m_IJVector, nvalues, indices, values));
}
// assable
HypreException.Check(Wrappers.IJVector.Assemble(m_IJVector));
HypreException.Check(Wrappers.IJVector.GetObject(m_IJVector, out ParCRS_vector));
}
/// <summary>
/// set/get this property
/// </summary>
/// <param name="level"></param>
/// <returns></returns>
public RelaxType this[CycleLevel level] {
get {
int k = (int)level;
int rt;
HypreException.Check(Wrappers.BoomerAMG.HYPRE_BoomerAMGGetCycleRelaxType(m_Solver, out rt, k));
return((RelaxType)rt);
}
set {
int k = (int)level;
int rt = (int)value;
HypreException.Check(Wrappers.BoomerAMG.HYPRE_BoomerAMGSetCycleRelaxType(m_Solver, rt, k));
}
}
/// <summary>
/// see <see cref="IMutableMatrix.GetValues"/>
/// </summary>
public double[] GetValues(int RowIndex, int[] ColumnIndices)
{
if (RowIndex < this.RowPartitioning.i0 || RowIndex >= (this.RowPartitioning.i0 + this.RowPartitioning.LocalLength))
{
throw new ArgumentOutOfRangeException("RowIndex", "row index not within local range");
}
double[] ret = new double[ColumnIndices.Length];
HypreException.Check(Wrappers.IJMatrix.GetValues(m_IJMatrix, 1, new int[] { ColumnIndices.Length }, new int[] { RowIndex }, ColumnIndices, ret));
return(ret);
}
/// <summary>
/// destroys the hypre PCG solver object, and the nested preconditioner,
/// if not allready done;
/// </summary>
public override void Dispose()
{
if (m_Solver.p != IntPtr.Zero)
{
IDisposable pc = m_NestedPrecond as IDisposable;
if (pc != null)
{
pc.Dispose();
}
HypreException.Check(Wrappers.ParCSRPCG.Destroy(m_Solver));
m_Solver.p = IntPtr.Zero;
}
base.Dispose();
}
/// <summary>
/// returns the diagonal element in the <paramref name="row"/>-th row.
/// </summary>
/// <param name="row">global row/column index</param>
/// <returns>value of diagonal element</returns>
public double GetDiagonalElement(int row)
{
if (row < m_RowPartition.i0 ||
row >= (m_RowPartition.i0 + m_RowPartition.LocalLength))
{
throw new IndexOutOfRangeException("row index is not assigned to current processor.");
}
int[] ncols = new int[] { 1 };
int[] rows = new int[] { row };
int[] cols = new int[] { row };
double[] ret = new double[1];
HypreException.Check(Wrappers.IJMatrix.GetValues(m_IJMatrix, 1, ncols, rows, cols, ret));
return(ret[0]);
}
/// <summary>
/// set/get this property
/// </summary>
/// <param name="level"></param>
/// <returns></returns>
public int this[CycleNumSweepsLevels level] {
get
{
int num_sweeps;
HypreException.Check(Wrappers.BoomerAMG.HYPRE_BoomerAMGGetCycleNumSweeps(m_solver, out num_sweeps, (int)level));
return(num_sweeps);
}
set
{
if (value < 0)
{
throw new ArgumentException("Positive Integers only are allowed");
}
int num_sweeps = value;
HypreException.Check(Wrappers.BoomerAMG.HYPRE_BoomerAMGSetCycleNumSweeps(m_solver, num_sweeps, (int)level));
}
}
/// <summary>
/// see <see cref="Solver.CallSolver"/>
/// </summary>
/// <remarks>
/// ParaSails should be used only as aa implicit preconditioner, this method
/// exists only for reasons of compability and completeness.
/// </remarks>
protected override void CallSolver(out int NoOfIter, out bool Converged, IJVector Unknowns, IJVector Rhs)
{
if (m_Solver.p == IntPtr.Zero)
{
throw new ApplicationException("solver not initialized");
}
HypreException.Check(Wrappers.ParaSails.__HYPRE_ParaSailsSetup(m_Solver, m_Matrix.m_ParCSR_matrix, Rhs.ParCRS_vector, Unknowns.ParCRS_vector));
Wrappers.ParaSails.__HYPRE_ParaSailsSolve(m_Solver, m_Matrix.m_ParCSR_matrix, Rhs.ParCRS_vector, Unknowns.ParCRS_vector);
// We dont want to raise an exception for
// a 'method did not converge'- or 'nomerical breakdown' - Error
// that may occur in HYPRE
Wrappers.Utilities.HYPRE_ClearAllErrors();
NoOfIter = 1;
Converged = true;
}
/// <summary>
/// (Optional) Defines the outer relaxation weight for hybrid
/// SOR or SSOR on the user defined level. Note that the finest level is denoted 0,
/// the next coarser level 1, etc. For nonpositive omega, an outer relaxation weight is
/// determined with at most k CG steps on each level
/// (this only makes sense for symmetric positive definite problems and smoothers, e.g. SSOR).
/// The default is 1;
/// </summary>
/// <param name="level"></param>
/// <returns></returns>
public double this[int level] {
get {
if (level < 0 || level >= NumLevels)
{
throw new IndexOutOfRangeException();
}
double val;
HypreException.Check(Wrappers.BoomerAMG.HYPRE_BoomerAMGGetLevelOuterWt(m_solver, out val, level));
return(val);
}
set {
if (level < 0 || level >= NumLevels)
{
throw new IndexOutOfRangeException();
}
HypreException.Check(Wrappers.BoomerAMG.HYPRE_BoomerAMGSetLevelOuterWt(m_solver, value, level));
}
}
/// <summary>
/// sets the diagonal element in the <paramref name="row"/>-th row
/// to value <paramref name="val"/>
/// </summary>
/// <param name="row">global row/column index</param>
/// <param name="val">new value of diagonal element</param>
public void SetDiagonalElement(int row, double val)
{
if (row < m_RowPartition.i0 ||
row >= (m_RowPartition.i0 + m_RowPartition.LocalLength))
{
throw new IndexOutOfRangeException("row index is not assigned to current processor.");
}
int[] ncols = new int[] { 1 };
int[] rows = new int[] { row };
int[] cols = new int[] { row };
double[] _val = new double[] { val };
HypreException.Check(Wrappers.IJMatrix.SetValues(m_IJMatrix, 1, ncols, rows, cols, _val));
//// test code:
//double vchk = GetDiagElement(row);
//if (vchk != val)
// throw new ApplicationException();
}
/// <summary>
/// create GMRES solver object
/// </summary>
protected override void CreateSolver()
{
HypreException.Check(Wrappers.ParCSRGMRES.CreateGMRES(csMPI.Raw._COMM.WORLD, out m_Solver));
PrintLevel = 0;
}
/// <summary>
/// creates solver for MPI_COMM_WORLD communicator
/// </summary>
protected override void CreateSolver()
{
HypreException.Check(Wrappers.Euclid.Create(csMPI.Raw._COMM.WORLD, out base.m_Solver));
}
/// <summary>
/// creates the native HYPRE object
/// </summary>
protected override void CreateSolver()
{
HypreException.Check(Wrappers.ParaSails.HYPRE_ParaSailsCreate(MPI.Wrappers.csMPI.Raw._COMM.WORLD, out base.m_Solver));
}
/// <summary>
/// creates the PCG solver object
/// </summary>
protected override void CreateSolver()
{
HypreException.Check(Wrappers.ParCSRPCG.Create(csMPI.Raw._COMM.WORLD, out m_Solver));
}
/// <summary>
/// initializes this matrix to be a copy of <paramref name="mtx"/>;
/// </summary>
/// <param name="mtx"></param>
public IJMatrix(IMutableMatrixEx mtx)
{
if (mtx.RowPartitioning.MPI_Comm != mtx.ColPartition.MPI_Comm)
{
throw new ArgumentException();
}
if (mtx.RowPartitioning.IsMutable)
{
throw new ArgumentException();
}
if (mtx.ColPartition.IsMutable)
{
throw new ArgumentException();
}
m_RowPartition = mtx.RowPartitioning;
m_ColPartition = mtx.ColPartition;
if (mtx.NoOfRows != mtx.NoOfCols)
{
throw new ArgumentException("matrix must be quadratic.", "mtx");
}
if (mtx.NoOfRows > (int.MaxValue - 2))
{
throw new ApplicationException("unable to create HYPRE matrix: no. of matrix rows is larger than HYPRE index type (32 bit signed int);");
}
if (mtx.NoOfCols > (int.MaxValue - 2))
{
throw new ApplicationException("unable to create HYPRE matrix: no. of matrix columns is larger than HYPRE index type (32 bit signed int);");
}
// matrix: init
MPI_Comm comm = csMPI.Raw._COMM.WORLD;
int ilower = (int)mtx.RowPartitioning.i0;
int iupper = (int)ilower + mtx.RowPartitioning.LocalLength - 1;
int jlower = (int)mtx.ColPartition.i0;
int jupper = (int)jlower + mtx.ColPartition.LocalLength - 1;
HypreException.Check(Wrappers.IJMatrix.Create(comm, ilower, iupper, jlower, jupper, out m_IJMatrix));
HypreException.Check(Wrappers.IJMatrix.SetObjectType(m_IJMatrix, Wrappers.Constants.HYPRE_PARCSR));
HypreException.Check(Wrappers.IJMatrix.Initialize(m_IJMatrix));
// matrix: set values, row by row ...
int nrows, lmax = mtx.GetMaxNoOfNonZerosPerRow();
int[] rows = new int[1], cols = new int[lmax], ncols = new int[1];
double[] values = new double[lmax];
int LR;
int[] col = null;
double[] val = null;
for (int i = 0; i < mtx.RowPartitioning.LocalLength; i++)
{
int iRowGlob = i + mtx.RowPartitioning.i0;
LR = mtx.GetRow(iRowGlob, ref col, ref val);
nrows = 1;
rows[0] = iRowGlob;
ncols[0] = LR;
int cnt = 0;
for (int j = 0; j < LR; j++)
{
if (val[j] != 0.0)
{
cols[cnt] = col[j];
values[cnt] = val[j];
cnt++;
}
}
if (cnt <= 0)
{
throw new ArgumentException(string.Format("Zero matrix row detected (local row index: {0}, global row index: {1}).", i, iRowGlob));
}
HypreException.Check(Wrappers.IJMatrix.SetValues(m_IJMatrix, nrows, ncols, rows, cols, values));
}
// matrix: assembly
HypreException.Check(Wrappers.IJMatrix.Assemble(m_IJMatrix));
HypreException.Check(Wrappers.IJMatrix.GetObject(m_IJMatrix, out m_ParCSR_matrix));
}
