Kokkos Node API and Local Linear Algebra Kernels Version of the Day
Tsqr_generateStack.hpp
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00041 
00042 #ifndef __TSQR_Test_generateStack_hpp
00043 #define __TSQR_Test_generateStack_hpp
00044 
00045 #include <Tsqr_Blas.hpp>
00046 #include <Tsqr_Lapack.hpp>
00047 #include <Tsqr_Matrix.hpp>
00048 #include <Tsqr_Util.hpp>
00049 #include <Tsqr_Random_MatrixGenerator.hpp>
00050 #include <Tsqr_RMessenger.hpp>
00051 
00052 #include <algorithm>
00053 #include <functional>
00054 #include <sstream>
00055 #include <stdexcept>
00056 
00057 
00058 namespace TSQR {
00059   namespace Test {
00060 
00080     template<class Ordinal, class Scalar, class Generator>
00081     static void
00082     generateStack (Generator& generator,
00083        Matrix<Ordinal, Scalar>& A_global,
00084        const typename Teuchos::ScalarTraits<Scalar>::magnitudeType singularValues[],
00085        const int numProcs,
00086        const Ordinal numCols)
00087     {
00088       TSQR::Random::MatrixGenerator<Ordinal, Scalar, Generator> matGen (generator);
00089       const Ordinal numRows = numProcs * numCols;
00090       A_global.reshape (numRows, numCols);
00091       A_global.fill (Scalar(0));
00092 
00093       for (int p = 0; p < numProcs; ++p)
00094   {
00095     Scalar* const curptr = A_global.get() + p*numCols;
00096     MatView<Ordinal, Scalar> R_cur (numCols, numCols, curptr, numRows);
00097     matGen.fill_random_R (numCols, R_cur.get(), numRows, singularValues);
00098   }
00099     }
00100 
00127     template<class Ordinal, class Scalar, class Generator>
00128     void
00129     par_tsqr_test_problem (Generator& generator,
00130          Matrix<Ordinal, Scalar>& A_local,
00131          Matrix<Ordinal, Scalar>& A_global, 
00132          const Ordinal ncols,
00133          const Teuchos::RCP<MessengerBase<Scalar> >& messenger)
00134     {
00135       const int nprocs = messenger->size();
00136       const int my_rank = messenger->rank();
00137       A_local.reshape (ncols, ncols);
00138 
00139       if (my_rank == 0)
00140   {
00141     typedef typename Teuchos::ScalarTraits< Scalar >::magnitudeType magnitude_type;
00142 
00143     std::vector< magnitude_type > singular_values (ncols);
00144     singular_values[0] = magnitude_type(1);
00145     for (Ordinal k = 1; k < ncols; ++k)
00146       singular_values[k] = singular_values[k-1] / magnitude_type(2);
00147 
00148     generateStack (generator, A_global, &singular_values[0], nprocs, ncols);
00149     scatterStack (A_global, A_local, messenger);
00150   }
00151       else
00152   scatterStack (A_global, A_local, messenger);
00153     }
00154 
00155 
00156   } // namespace Test
00157 } // namespace TSQR
00158 
00159 #endif // __TSQR_Test_generateStack_hpp
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