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       1                 :            : // *****************************************************************************
       2                 :            : /*!
       3                 :            :   \file      src/Inciter/DiagReducer.cpp
       4                 :            :   \copyright 2012-2015 J. Bakosi,
       5                 :            :              2016-2018 Los Alamos National Security, LLC.,
       6                 :            :              2019-2021 Triad National Security, LLC.,
       7                 :            :              2022-2024 J. Bakosi
       8                 :            :              All rights reserved. See the LICENSE file for details.
       9                 :            :   \brief     Custom Charm++ reducer for merging diagnostics across PEs
      10                 :            :   \details   Custom Charm++ reducer for merging diagnostics across PEs.
      11                 :            : */
      12                 :            : // *****************************************************************************
      13                 :            : 
      14                 :            : #include <stddef.h>
      15                 :            : #include <type_traits>
      16                 :            : #include <memory>
      17                 :            : 
      18                 :            : #include "DiagReducer.hpp"
      19                 :            : #include "Diagnostics.hpp"
      20                 :            : #include "Exception.hpp"
      21                 :            : 
      22                 :            : namespace inciter {
      23                 :            : namespace diagnostics {
      24                 :            : 
      25                 :            : std::pair< int, std::unique_ptr<char[]> >
      26                 :      44759 : serialize( std::size_t meshid,
      27                 :            :            std::size_t ncomp,
      28                 :            :            const std::vector< std::vector< tk::real > >& d )
      29                 :            : // *****************************************************************************
      30                 :            : // Serialize diagnostics to raw memory stream
      31                 :            : //! \param[in] meshid Mesh ID
      32                 :            : //! \param[in] ncomp Number of scalar components whose diagnostics are computed
      33                 :            : //! \param[in] d Diagnostics vector of vectors (of eq components)
      34                 :            : //! \return Pair of the length and the raw stream containing the serialized
      35                 :            : //!   vectors
      36                 :            : // *****************************************************************************
      37                 :            : {
      38                 :            :   // Prepare for serializing diagnostics to a raw binary stream, compute size
      39                 :      44759 :   PUP::sizer sizer;
      40         [ +  - ]:      44759 :   sizer | meshid;
      41         [ +  - ]:      44759 :   sizer | ncomp;
      42         [ +  - ]:      44759 :   sizer | const_cast< std::vector< std::vector< tk::real > >& >( d );
      43                 :            : 
      44                 :            :   // Create raw character stream to store the serialized vectors
      45         [ +  - ]:      44759 :   std::unique_ptr<char[]> flatData = std::make_unique<char[]>( sizer.size() );
      46                 :            : 
      47                 :            :   // Serialize vector, each message will contain a vector
      48                 :      44759 :   PUP::toMem packer( flatData.get() );
      49         [ +  - ]:      44759 :   packer | meshid;
      50         [ +  - ]:      44759 :   packer | ncomp;
      51         [ +  - ]:      44759 :   packer | const_cast< std::vector< std::vector< tk::real > >& >( d );
      52                 :            : 
      53                 :            :   // Return size of and raw stream
      54                 :      89518 :   return { sizer.size(), std::move(flatData) };
      55                 :      44759 : }
      56                 :            : 
      57                 :            : CkReductionMsg*
      58                 :       7505 : mergeDiag( int nmsg, CkReductionMsg **msgs )
      59                 :            : // *****************************************************************************
      60                 :            : // Charm++ custom reducer for merging diagnostics during reduction across PEs
      61                 :            : //! \param[in] nmsg Number of messages in msgs
      62                 :            : //! \param[in] msgs Charm++ reduction message containing the serialized
      63                 :            : //!   diagnostics
      64                 :            : //! \return Aggregated diagnostics built for further aggregation if needed
      65                 :            : // *****************************************************************************
      66                 :            : {
      67                 :            :   using namespace diagnostics;
      68                 :            : 
      69                 :            :   // Will store deserialized diagnostics vector of vectors
      70                 :            :   std::size_t meshid;
      71                 :            :   std::size_t ncomp;
      72                 :       7505 :   std::vector< std::vector< tk::real > > v;
      73                 :            : 
      74                 :            :   // Create PUP deserializer based on message passed in
      75                 :       7505 :   PUP::fromMem creator( msgs[0]->getData() );
      76                 :            : 
      77                 :            :   // Deserialize vector from raw stream
      78                 :            :   // cppcheck-suppress uninitvar
      79         [ +  - ]:       7505 :   creator | meshid;
      80         [ +  - ]:       7505 :   creator | ncomp;
      81         [ +  - ]:       7505 :   creator | v;
      82                 :            : 
      83         [ +  + ]:      40781 :   for (int m=1; m<nmsg; ++m) {
      84                 :            :     // Unpack vector
      85                 :            :     std::size_t mid;
      86                 :            :     std::size_t nc;
      87                 :      33276 :     std::vector< std::vector< tk::real > > w;
      88                 :      33276 :     PUP::fromMem curCreator( msgs[m]->getData() );
      89                 :            :     // cppcheck-suppress uninitvar
      90         [ +  - ]:      33276 :     curCreator | mid;
      91         [ +  - ]:      33276 :     curCreator | nc;
      92         [ +  - ]:      33276 :     curCreator | w;
      93                 :            :     // Aggregate diagnostics vector
      94                 :            :     // cppcheck-suppress uninitvar
      95                 :            :     // cppcheck-suppress unreadVariable
      96                 :      33276 :     meshid = mid;
      97                 :      33276 :     ncomp = nc;
      98 [ -  + ][ -  - ]:      33276 :     Assert( v.size() == w.size(),
         [ -  - ][ -  - ]
      99                 :            :             "Size mismatch during diagnostics aggregation" );
     100 [ -  + ][ -  - ]:      33276 :     Assert( v.size() == NUMDIAG,
         [ -  - ][ -  - ]
     101                 :            :             "Size mismatch during diagnostics aggregation" );
     102                 :            :     // cppcheck-suppress unsignedLessThanZero
     103         [ +  + ]:     299484 :     for (std::size_t i=0; i<v.size(); ++i)
     104 [ -  + ][ -  - ]:     266208 :       Assert( v[i].size() == w[i].size(),
         [ -  - ][ -  - ]
     105                 :            :               "Size mismatch during diagnostics aggregation" );
     106                 :            :     // Apply diagnostics aggregation policy
     107                 :            :     // Sum for L2 normal of the numerical solution for all scalar components
     108         [ +  + ]:     196071 :     for (std::size_t i=0; i<v[L2SOL].size(); ++i) v[L2SOL][i] += w[L2SOL][i];
     109                 :            :     // Sum for the L2 norm of the residual of all components
     110         [ +  + ]:     196071 :     for (std::size_t i=0; i<v[L2RES].size(); ++i) v[L2RES][i] += w[L2RES][i];
     111                 :            :     // Sum of the total energy over the entire domain
     112                 :      33276 :     v[TOTALEN][0] += w[TOTALEN][0];
     113                 :            :     // Sum for the L2 norm of the numerical - analytical solution for all comps
     114         [ +  + ]:     196071 :     for (std::size_t i=0; i<v[L2ERR].size(); ++i) v[L2ERR][i] += w[L2ERR][i];
     115                 :            :     // Sum for the L1 norm of the numerical - analytical solution for all comps
     116         [ +  + ]:     196071 :     for (std::size_t i=0; i<v[L1ERR].size(); ++i) v[L1ERR][i] += w[L1ERR][i];
     117                 :            :     // Copy ITER, TIME, DT
     118         [ +  + ]:     196071 :     for (std::size_t i=0; i<v[ITER].size(); ++i) v[ITER][i] = w[ITER][i];
     119         [ +  + ]:     196071 :     for (std::size_t i=0; i<v[TIME].size(); ++i) v[TIME][i] = w[TIME][i];
     120         [ +  + ]:     196071 :     for (std::size_t i=0; i<v[DT].size(); ++i) v[DT][i] = w[DT][i];
     121                 :      33276 :   }
     122                 :            : 
     123                 :            :   // Serialize concatenated diagnostics vector to raw stream
     124         [ +  - ]:       7505 :   auto stream = serialize( meshid, ncomp, v );
     125                 :            : 
     126                 :            :   // Forward serialized diagnostics
     127         [ +  - ]:      15010 :   return CkReductionMsg::buildNew( stream.first, stream.second.get() );
     128                 :       7505 : }
     129                 :            : 
     130                 :            : } // diagnostics::
     131                 :            : } // inciter::