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/*
//@HEADER
// ***********************************************************************
//
// Ifpack2: Templated Object-Oriented Algebraic Preconditioner Package
// Copyright (2009) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
//@HEADER
*/
/*! \file Ifpack2_UnitTestChebyshev.cpp
\brief Ifpack2 Unit test for the Chebyshev template.
*/
#include <Teuchos_ConfigDefs.hpp>
#include <Ifpack2_ConfigDefs.hpp>
#include <Teuchos_UnitTestHarness.hpp>
#include <Ifpack2_Version.hpp>
#include <iostream>
#include <Ifpack2_UnitTestHelpers.hpp>
#include <Ifpack2_Chebyshev.hpp>
namespace {
using Tpetra::global_size_t;
typedef tif_utest::Node Node;
//this macro declares the unit-test-class:
TEUCHOS_UNIT_TEST_TEMPLATE_3_DECL(Ifpack2Chebyshev, Test0, Scalar, LocalOrdinal, GlobalOrdinal)
{
//we are now in a class method declared by the above macro, and
//that method has these input arguments:
//Teuchos::FancyOStream& out, bool& success
std::string version = Ifpack2::Version();
out << "Ifpack2::Version(): " << version << std::endl;
global_size_t num_rows_per_proc = 5;
const Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > rowmap = tif_utest::create_tpetra_map<LocalOrdinal,GlobalOrdinal,Node>(num_rows_per_proc);
Teuchos::RCP<const Tpetra::CrsMatrix<Scalar,LocalOrdinal,GlobalOrdinal,Node> > crsmatrix = tif_utest::create_test_matrix<Scalar,LocalOrdinal,GlobalOrdinal,Node>(rowmap);
Ifpack2::Chebyshev<Tpetra::RowMatrix<Scalar,LocalOrdinal,GlobalOrdinal,Node> > prec(crsmatrix);
Scalar one = Teuchos::ScalarTraits<Scalar>::one();
Scalar zero = Teuchos::ScalarTraits<Scalar>::zero();
//for the diagonal matrix, set the following parameters to make
//the preconditioner do an exact solve with a 1-degree polynomial:
Teuchos::ParameterList params;
params.set("chebyshev: degree", 1);
Scalar lambdamin = zero;
Scalar lambdamax = one;
Scalar eigratio = one / 0.9;
params.set("chebyshev: min eigenvalue", lambdamin);
params.set("chebyshev: max eigenvalue", lambdamax);
params.set("chebyshev: ratio eigenvalue", eigratio);
TEST_NOTHROW(prec.setParameters(params));
//trivial tests to insist that the preconditioner's domain/range maps are
//identically those of the matrix:
Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > mtx_dom_map_ptr = crsmatrix->getDomainMap();
Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > mtx_rng_map_ptr = crsmatrix->getRangeMap();
Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > prec_dom_map_ptr = prec.getDomainMap();
Teuchos::RCP<const Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node> > prec_rng_map_ptr = prec.getRangeMap();
TEST_EQUALITY( prec_dom_map_ptr, mtx_dom_map_ptr );
TEST_EQUALITY( prec_rng_map_ptr, mtx_rng_map_ptr );
prec.initialize();
prec.compute();
Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> x(rowmap,2), y(rowmap,2);
x.putScalar(1);
prec.applyMat(x, y);
Teuchos::ArrayRCP<const Scalar> yview = y.get1dView();
//Since crsmatrix is a diagonal matrix with 2 on the diagonal,
//y should be full of 2's now.
Teuchos::ArrayRCP<Scalar> twos(num_rows_per_proc*2, 2);
TEST_COMPARE_FLOATING_ARRAYS(yview, twos(), Teuchos::ScalarTraits<Scalar>::eps());
prec.apply(x, y);
//y should be full of 0.5's now.
Teuchos::ArrayRCP<Scalar> halfs(num_rows_per_proc*2, 0.5);
typename Teuchos::ScalarTraits<Scalar>::magnitudeType trial_tol = 1.e-13;
typename Teuchos::ScalarTraits<Scalar>::magnitudeType tol = std::max(trial_tol, Teuchos::ScalarTraits<Scalar>::eps());
TEST_COMPARE_FLOATING_ARRAYS(yview, halfs(), tol);
//If I now increase the degree of the polynomial to 4 the solve won't be
//exact, but it should still be within a tol of 1.e-4 for this trivial data.
params.set("chebyshev: degree", 4);
prec.setParameters(params);
prec.apply(x, y);
tol = 1.e-4;
TEST_COMPARE_FLOATING_ARRAYS(yview, halfs(), tol);
}
#define UNIT_TEST_GROUP_SC_LO_GO(Scalar,LocalOrdinal,GlobalOrdinal) \
TEUCHOS_UNIT_TEST_TEMPLATE_3_INSTANT( Ifpack2Chebyshev, Test0, Scalar, LocalOrdinal,GlobalOrdinal)
#include "Ifpack2_ETIHelperMacros.h"
IFPACK2_ETI_MANGLING_TYPEDEFS()
// Test all enabled combinations of Scalar (SC), LocalOrdinal (LO),
// and GlobalOrdinal (GO) types, where Scalar is real.
IFPACK2_INSTANTIATE_SLG_REAL( UNIT_TEST_GROUP_SC_LO_GO )
} // namespace (anonymous)
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