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//======================================================================================================================
//
// This file is part of waLBerla. waLBerla is free software: you can
// redistribute it and/or modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// waLBerla is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with waLBerla (see COPYING.txt). If not, see <http://www.gnu.org/licenses/>.
//
//! \file UniformGrid.cpp
//! \author Florian Schornbaum <florian.schornbaum@fau.de>
//
//======================================================================================================================
#include "blockforest/Initialization.h"
#include "blockforest/SetupBlockForest.h"
#include "blockforest/StructuredBlockForest.h"
#include "blockforest/communication/UniformBufferedScheme.h"
#include "blockforest/communication/UniformDirectScheme.h"
#include "blockforest/loadbalancing/Cartesian.h"
#include "boundary/BoundaryHandling.h"
#include "core/Abort.h"
#include "core/DataTypes.h"
#include "core/cell/CellInterval.h"
#include "core/config/Config.h"
#include "core/debug/Debug.h"
#include "core/debug/TestSubsystem.h"
#include "core/logging/Logging.h"
#include "core/math/IntegerFactorization.h"
#include "core/math/Vector3.h"
#include "core/mpi/Environment.h"
#include "core/mpi/MPIManager.h"
#include "core/mpi/MPIWrapper.h"
#include "core/mpi/Reduce.h"
#include "core/timing/TimingPool.h"
#include "domain_decomposition/SharedSweep.h"
#include "field/AddToStorage.h"
#include "field/FlagField.h"
#include "field/FlagUID.h"
#include "field/communication/PackInfo.h"
#include "field/communication/UniformMPIDatatypeInfo.h"
#include "field/iterators/FieldIterator.h"
#include "field/vtk/FlagFieldCellFilter.h"
#include "field/vtk/VTKWriter.h"
#include "lbm/BlockForestEvaluation.h"
#include "lbm/PerformanceEvaluation.h"
#include "lbm/boundary/NoSlip.h"
#include "lbm/boundary/SimpleUBB.h"
#include "lbm/communication/PdfFieldPackInfo.h"
#include "lbm/communication/PdfFieldMPIDatatypeInfo.h"
#include "lbm/field/AddToStorage.h"
#include "lbm/field/PdfField.h"
#include "lbm/lattice_model/CollisionModel.h"
#include "lbm/lattice_model/D3Q19.h"
#include "lbm/sweeps/CellwiseSweep.h"
#include "lbm/sweeps/SplitPureSweep.h"
#include "lbm/sweeps/SplitSweep.h"
#include "lbm/sweeps/SweepWrappers.h"
#include "lbm/vtk/Density.h"
#include "lbm/vtk/Velocity.h"
#include "postprocessing/sqlite/SQLite.h"
#include "stencil/D3Q19.h"
#include "stencil/D3Q27.h"
#include "timeloop/SweepTimeloop.h"
#include "vtk/BlockCellDataWriter.h"
#include "vtk/Initialization.h"
#include "vtk/VTKOutput.h"
#include <cstdlib>
#include <iostream>
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namespace uniform_grid {
///////////
// USING //
///////////
using namespace walberla;
using walberla::uint_t;
using walberla::real_t;
//////////////
// TYPEDEFS //
//////////////
typedef lbm::D3Q19< lbm::collision_model::SRT, false > D3Q19_SRT_INCOMP;
typedef lbm::D3Q19< lbm::collision_model::SRT, true > D3Q19_SRT_COMP;
typedef lbm::D3Q19< lbm::collision_model::TRT, false > D3Q19_TRT_INCOMP;
typedef lbm::D3Q19< lbm::collision_model::TRT, true > D3Q19_TRT_COMP;
typedef lbm::D3Q19< lbm::collision_model::D3Q19MRT, false > D3Q19_MRT_INCOMP;
typedef lbm::D3Q27< lbm::collision_model::D3Q27Cumulant, true > D3Q27_CUMULANT_COMP;
template< typename LatticeModel_T >
struct Types
{
using Stencil_T = typename LatticeModel_T::Stencil;
using CommunicationStencil_T = typename LatticeModel_T::CommunicationStencil;
using PdfField_T = lbm::PdfField< LatticeModel_T >;
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};
using flag_t = walberla::uint8_t;
using FlagField_T = FlagField<flag_t>;
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const uint_t FieldGhostLayers = 1;
///////////
// FLAGS //
///////////
const FlagUID Fluid_Flag( "fluid" );
const FlagUID UBB_Flag( "velocity bounce back" );
const FlagUID NoSlip_Flag( "no slip" );
/////////////////////
// OUTPUT HELPERS //
/////////////////////
template< typename LatticeModel_T, class Enable = void >
struct StencilString;
template< typename LatticeModel_T >
struct StencilString< LatticeModel_T, typename boost::enable_if_c< boost::is_same< typename LatticeModel_T::Stencil, stencil::D3Q19 >::value >::type >
{
static const char * str() { return "D3Q19"; }
};
template< typename LatticeModel_T >
struct StencilString< LatticeModel_T, typename boost::enable_if_c< boost::is_same< typename LatticeModel_T::Stencil, stencil::D3Q27 >::value >::type >
{
static const char * str() { return "D3Q27"; }
};
template< typename LatticeModel_T, class Enable = void >
struct CollisionModelString;
template< typename LatticeModel_T >
struct CollisionModelString< LatticeModel_T, typename boost::enable_if_c< boost::is_same< typename LatticeModel_T::CollisionModel::tag,
lbm::collision_model::SRT_tag >::value >::type >
{
static const char * str() { return "SRT"; }
};
template< typename LatticeModel_T >
struct CollisionModelString< LatticeModel_T, typename boost::enable_if_c< boost::is_same< typename LatticeModel_T::CollisionModel::tag,
lbm::collision_model::TRT_tag >::value >::type >
{
static const char * str() { return "TRT"; }
};
template< typename LatticeModel_T >
struct CollisionModelString< LatticeModel_T, typename boost::enable_if_c< boost::is_same< typename LatticeModel_T::CollisionModel::tag,
lbm::collision_model::MRT_tag >::value >::type >
{
static const char * str() { return "MRT"; }
};
template< typename LatticeModel_T >
struct CollisionModelString< LatticeModel_T, typename boost::enable_if_c< boost::is_same< typename LatticeModel_T::CollisionModel::tag,
lbm::collision_model::Cumulant_tag >::value >::type >
{
static const char * str() { return "Cumulant"; }
};
/////////////
// CONFIG //
/////////////
static inline void getCells( const Config::BlockHandle & configBlock, uint_t & xCells, uint_t & yCells, uint_t & zCells )
{
xCells = configBlock.getParameter< uint_t >( "xCells", 10 );
yCells = configBlock.getParameter< uint_t >( "yCells", 10 );
zCells = configBlock.getParameter< uint_t >( "zCells", 10 );
}
static inline void getCellsAndProcesses( const Config::BlockHandle & configBlock,
const uint_t numberOfProcesses, const uint_t blocksPerProcess,
uint_t & xCells, uint_t & yCells, uint_t & zCells,
uint_t & xProcesses, uint_t & yProcesses, uint_t & zProcesses,
uint_t & xBlocks, uint_t & yBlocks, uint_t & zBlocks )
{
getCells( configBlock, xCells, yCells, zCells );
std::vector< real_t > weighting;
weighting.push_back( configBlock.getParameter< real_t >( "xWeight", real_t(1) ) / real_c(xCells) );
weighting.push_back( configBlock.getParameter< real_t >( "yWeight", real_t(1) ) / real_c(yCells) );
weighting.push_back( configBlock.getParameter< real_t >( "zWeight", real_t(1) ) / real_c(zCells) );
std::vector< uint_t > processes = math::getFactors( numberOfProcesses, 3, weighting );
WALBERLA_CHECK_EQUAL( processes.size(), 3 );
WALBERLA_CHECK_EQUAL( processes[0] * processes[1] * processes[2], numberOfProcesses );
xProcesses = processes[0];
yProcesses = processes[1];
zProcesses = processes[2];
Vector3< uint_t > blocksPerProcess3D = math::getFactors3D( blocksPerProcess );
xBlocks = processes[0] * blocksPerProcess3D[0];
yBlocks = processes[1] * blocksPerProcess3D[1];
zBlocks = processes[2] * blocksPerProcess3D[2];
}
///////////////////////////
// BLOCK STRUCTURE SETUP //
///////////////////////////
void createSetupBlockForest( blockforest::SetupBlockForest & sforest, const Config::BlockHandle & configBlock, const uint_t numberOfProcesses, const uint_t blocksPerProcess )
{
uint_t numberOfXCellsPerBlock, numberOfYCellsPerBlock, numberOfZCellsPerBlock;
uint_t numberOfXProcesses, numberOfYProcesses, numberOfZProcesses;
uint_t numberOfXBlocks, numberOfYBlocks, numberOfZBlocks;
getCellsAndProcesses( configBlock, numberOfProcesses, blocksPerProcess,
numberOfXCellsPerBlock, numberOfYCellsPerBlock, numberOfZCellsPerBlock,
numberOfXProcesses, numberOfYProcesses, numberOfZProcesses,
numberOfXBlocks, numberOfYBlocks, numberOfZBlocks );
sforest.addWorkloadMemorySUIDAssignmentFunction( blockforest::uniformWorkloadAndMemoryAssignment );
sforest.init( AABB( real_t(0), real_t(0), real_t(0), real_c( numberOfXBlocks * numberOfXCellsPerBlock ),
real_c( numberOfYBlocks * numberOfYCellsPerBlock ),
real_c( numberOfZBlocks * numberOfZCellsPerBlock ) ),
numberOfXBlocks, numberOfYBlocks, numberOfZBlocks, false, false, false );
if( MPIManager::instance()->numProcesses() > 1 )
{
shared_ptr< std::vector<uint_t> > processIdMap;
WALBERLA_MPI_SECTION()
{
if ( MPIManager::instance()->isCartesianCommValid() )
{
MPIManager::instance()->createCartesianComm(numberOfXProcesses, numberOfYProcesses, numberOfZProcesses, false, false, false);
processIdMap = make_shared<std::vector<uint_t> >(numberOfXProcesses * numberOfYProcesses * numberOfZProcesses);
for (uint_t z = 0; z != numberOfZProcesses; ++z) {
for (uint_t y = 0; y != numberOfYProcesses; ++y) {
for (uint_t x = 0; x != numberOfXProcesses; ++x)
{
(*processIdMap)[z * numberOfXProcesses * numberOfYProcesses + y * numberOfXProcesses + x] =
uint_c(MPIManager::instance()->cartesianRank(x, y, z));
}
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}
}
}
else {
WALBERLA_LOG_WARNING_ON_ROOT( "Your version of OpenMPI contains a bug. See waLBerla issue #73 for more "
"information. As a workaround, MPI_COMM_WORLD instead of a "
"Cartesian MPI communicator is used." );
MPIManager::instance()->useWorldComm();
}
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}
else
MPIManager::instance()->useWorldComm();
sforest.balanceLoad( blockforest::CartesianDistribution( numberOfXProcesses, numberOfYProcesses, numberOfZProcesses, processIdMap.get() ),
numberOfXProcesses * numberOfYProcesses * numberOfZProcesses );
}
else
{
MPIManager::instance()->useWorldComm();
sforest.balanceLoad( blockforest::CartesianDistribution( numberOfXProcesses, numberOfYProcesses, numberOfZProcesses, nullptr ),
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numberOfXProcesses * numberOfYProcesses * numberOfZProcesses, real_t(0), 0, true );
}
WALBERLA_LOG_INFO_ON_ROOT( "SetupBlockForest created successfully:\n" << sforest );
}
shared_ptr< blockforest::StructuredBlockForest > createStructuredBlockForest( const Config::BlockHandle & configBlock )
{
uint_t numberOfXCellsPerBlock, numberOfYCellsPerBlock, numberOfZCellsPerBlock;
getCells( configBlock, numberOfXCellsPerBlock, numberOfYCellsPerBlock, numberOfZCellsPerBlock );
const uint_t blocksPerProcess = configBlock.getParameter< uint_t >( "blocksPerProcess", uint_t( 1 ) );
if( configBlock.isDefined( "sbffile" ) )
{
std::string sbffile = configBlock.getParameter< std::string >( "sbffile" );
WALBERLA_LOG_INFO_ON_ROOT( "Creating the block structure: loading from file \'" << sbffile << "\' ..." );
return blockforest::createUniformBlockGrid( sbffile, numberOfXCellsPerBlock, numberOfYCellsPerBlock, numberOfZCellsPerBlock, false );
}
WALBERLA_LOG_INFO_ON_ROOT( "Creating the block structure ..." );
blockforest::SetupBlockForest sforest;
createSetupBlockForest( sforest, configBlock, uint_c( MPIManager::instance()->numProcesses() ), blocksPerProcess );
auto bf = std::make_shared< blockforest::BlockForest >( uint_c( MPIManager::instance()->rank() ), sforest, false );
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auto sbf = std::make_shared< blockforest::StructuredBlockForest >( bf, numberOfXCellsPerBlock,
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numberOfYCellsPerBlock,
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sbf->createCellBoundingBoxes();
return sbf;
}
///////////////////////
// BOUNDARY HANDLING //
///////////////////////
template< typename LatticeModel_T >
class MyBoundaryHandling
{
public:
typedef lbm::NoSlip< LatticeModel_T, flag_t > NoSlip_T;
typedef lbm::SimpleUBB< LatticeModel_T, flag_t > UBB_T;
typedef boost::tuples::tuple< NoSlip_T, UBB_T > BoundaryConditions_T;
typedef BoundaryHandling< FlagField_T, typename Types<LatticeModel_T>::Stencil_T, BoundaryConditions_T > BoundaryHandling_T;
MyBoundaryHandling( const BlockDataID & flagField, const BlockDataID & pdfField, const real_t velocity ) :
flagField_( flagField ), pdfField_( pdfField ), velocity_( velocity ) {}
BoundaryHandling_T * operator()( IBlock* const block, const StructuredBlockStorage* const storage ) const;
private:
const BlockDataID flagField_;
const BlockDataID pdfField_;
const real_t velocity_;
}; // class MyBoundaryHandling
template< typename LatticeModel_T >
typename MyBoundaryHandling<LatticeModel_T>::BoundaryHandling_T *
MyBoundaryHandling<LatticeModel_T>::operator()( IBlock * const block, const StructuredBlockStorage * const storage ) const
{
using PdfField_T = typename Types< LatticeModel_T >::PdfField_T;
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WALBERLA_ASSERT_NOT_NULLPTR( block );
WALBERLA_ASSERT_NOT_NULLPTR( storage );
FlagField_T * flagField = block->getData< FlagField_T >( flagField_ );
PdfField_T * pdfField = block->getData< PdfField_T > ( pdfField_ );
const auto fluid = flagField->flagExists( Fluid_Flag ) ? flagField->getFlag( Fluid_Flag ) : flagField->registerFlag( Fluid_Flag );
BoundaryHandling_T * handling = new BoundaryHandling_T( "boundary handling", flagField, fluid,
boost::tuples::make_tuple( NoSlip_T( "no slip", NoSlip_Flag, pdfField ),
UBB_T( "velocity bounce back", UBB_Flag, pdfField, velocity_, real_c(0), real_c(0) ) ) );
CellInterval domainBB = storage->getDomainCellBB();
storage->transformGlobalToBlockLocalCellInterval( domainBB, *block );
// no slip WEST
CellInterval west( domainBB.xMin(), domainBB.yMin(), domainBB.zMin(), domainBB.xMin(), domainBB.yMax(), domainBB.zMax() );
handling->forceBoundary( NoSlip_Flag, west );
// no slip EAST
CellInterval east( domainBB.xMax(), domainBB.yMin(), domainBB.zMin(), domainBB.xMax(), domainBB.yMax(), domainBB.zMax() );
handling->forceBoundary( NoSlip_Flag, east );
// no slip SOUTH
CellInterval south( domainBB.xMin(), domainBB.yMin(), domainBB.zMin(), domainBB.xMax(), domainBB.yMin(), domainBB.zMax() );
handling->forceBoundary( NoSlip_Flag, south );
// no slip NORTH
CellInterval north( domainBB.xMin(), domainBB.yMax(), domainBB.zMin(), domainBB.xMax(), domainBB.yMax(), domainBB.zMax() );
handling->forceBoundary( NoSlip_Flag, north );
// no slip BOTTOM
CellInterval bottom( domainBB.xMin(), domainBB.yMin(), domainBB.zMin(), domainBB.xMax(), domainBB.yMax(), domainBB.zMin() );
handling->forceBoundary( NoSlip_Flag, bottom );
// velocity bounce back TOP
CellInterval top( domainBB.xMin(), domainBB.yMin(), domainBB.zMax(), domainBB.xMax(), domainBB.yMax(), domainBB.zMax() );
handling->forceBoundary( UBB_Flag, top );
handling->fillWithDomain( domainBB );
return handling;
}
/////////
// VTK //
/////////
template< typename LatticeModel_T >
class MyVTKOutput {
public:
MyVTKOutput( const ConstBlockDataID & pdfField, const ConstBlockDataID & flagField,
const vtk::VTKOutput::BeforeFunction& pdfGhostLayerSync ) :
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pdfField_( pdfField ), flagField_( flagField ), pdfGhostLayerSync_( pdfGhostLayerSync ) {}
void operator()( std::vector< shared_ptr<vtk::BlockCellDataWriterInterface> > & writers,
std::map< std::string, vtk::VTKOutput::CellFilter > & filters,
std::map< std::string, vtk::VTKOutput::BeforeFunction > & beforeFunctions );
private:
const ConstBlockDataID pdfField_;
const ConstBlockDataID flagField_;
vtk::VTKOutput::BeforeFunction pdfGhostLayerSync_;
}; // class MyVTKOutput
template< typename LatticeModel_T >
void MyVTKOutput<LatticeModel_T>::operator()( std::vector< shared_ptr<vtk::BlockCellDataWriterInterface> > & writers,
std::map< std::string, vtk::VTKOutput::CellFilter > & filters,
std::map< std::string, vtk::VTKOutput::BeforeFunction > & beforeFunctions )
{
// block data writers
writers.push_back( make_shared< lbm::VelocityVTKWriter<LatticeModel_T> >( pdfField_, "VelocityFromPDF" ) );
writers.push_back( make_shared< lbm::DensityVTKWriter<LatticeModel_T> >( pdfField_, "DensityFromPDF" ) );
writers.push_back( make_shared< field::VTKWriter< FlagField_T > >( flagField_, "FlagField" ) );
// cell filters
field::FlagFieldCellFilter<FlagField_T> fluidFilter( flagField_ );
fluidFilter.addFlag( Fluid_Flag );
filters[ "FluidFilter" ] = fluidFilter;
field::FlagFieldCellFilter<FlagField_T> obstacleFilter( flagField_ );
obstacleFilter.addFlag( NoSlip_Flag );
obstacleFilter.addFlag( UBB_Flag );
filters[ "ObstacleFilter" ] = obstacleFilter;
// before functions
beforeFunctions[ "PDFGhostLayerSync" ] = pdfGhostLayerSync_;
}
////////////////////
// THE SIMULATION //
////////////////////
template< typename LatticeModel_T, class Enable = void >
struct AddLB
{
using PdfField = typename Types< LatticeModel_T >::PdfField_T;
using CommunicationStencil = typename Types< LatticeModel_T >::CommunicationStencil_T;
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static void add( shared_ptr< blockforest::StructuredBlockForest > & blocks, SweepTimeloop & timeloop,
const BlockDataID & pdfFieldId, const BlockDataID & flagFieldId, const BlockDataID & boundaryHandlingId,
const bool split, const bool pure, const bool fullComm, const bool fused, const bool directComm )
{
// setup of the LB communication for synchronizing the pdf field between neighboring blocks
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if( directComm )
{
if( fullComm )
{
blockforest::communication::UniformDirectScheme< stencil::D3Q27 > comm( blocks );
auto mpiDatatypeInfo = make_shared<field::communication::UniformMPIDatatypeInfo< PdfField > >( pdfFieldId );
comm.addDataToCommunicate( mpiDatatypeInfo );
commFunction = comm;
}
else
{
blockforest::communication::UniformDirectScheme< CommunicationStencil > comm( blocks );
auto mpiDatatypeInfo = make_shared<lbm::communication::PdfFieldMPIDatatypeInfo< PdfField > >( pdfFieldId );
comm.addDataToCommunicate( mpiDatatypeInfo );
commFunction = comm;
}
}
else
{
if( fullComm )
{
blockforest::communication::UniformBufferedScheme< stencil::D3Q27 > scheme( blocks );
scheme.addPackInfo( make_shared< field::communication::PackInfo< PdfField > >( pdfFieldId ) );
commFunction = scheme;
}
else
{
blockforest::communication::UniformBufferedScheme< CommunicationStencil > scheme( blocks );
scheme.addPackInfo( make_shared< lbm::PdfFieldPackInfo< LatticeModel_T > >( pdfFieldId ) );
commFunction = scheme;
}
}
if( fused )
{
timeloop.add() << BeforeFunction( commFunction, "LB communication" )
<< Sweep( MyBoundaryHandling<LatticeModel_T>::BoundaryHandling_T::getBlockSweep( boundaryHandlingId ), "LB boundary sweep" );
if( split )
{
if( pure )
timeloop.add() << Sweep( lbm::SplitPureSweep< LatticeModel_T >( pdfFieldId ), "split pure LB sweep (stream & collide)" );
else
timeloop.add() << Sweep( lbm::SplitSweep< LatticeModel_T, FlagField_T >( pdfFieldId, flagFieldId, Fluid_Flag ), "split LB sweep (stream & collide)" );
}
else
timeloop.add() << Sweep( makeSharedSweep( lbm::makeCellwiseSweep< LatticeModel_T, FlagField_T >( pdfFieldId, flagFieldId, Fluid_Flag ) ), "cell-wise LB sweep (stream & collide)" );
}
else
{
if( split )
{
if( pure )
{
using Sweep_T = lbm::SplitPureSweep< LatticeModel_T >;
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auto sweep = make_shared< Sweep_T >( pdfFieldId );
timeloop.add() << Sweep( lbm::CollideSweep< Sweep_T >( sweep ), "split pure LB sweep (collide)" );
timeloop.add() << BeforeFunction( commFunction, "LB communication" )
<< Sweep( MyBoundaryHandling<LatticeModel_T>::BoundaryHandling_T::getBlockSweep( boundaryHandlingId ), "LB boundary sweep" );
timeloop.add() << Sweep( lbm::StreamSweep< Sweep_T >( sweep ), "split pure LB sweep (stream)" );
}
else
{
typedef lbm::SplitSweep< LatticeModel_T, FlagField_T > Sweep_T;
auto sweep = make_shared< Sweep_T >( pdfFieldId, flagFieldId, Fluid_Flag );
timeloop.add() << Sweep( lbm::CollideSweep< Sweep_T >( sweep ), "split LB sweep (collide)" );
timeloop.add() << BeforeFunction( commFunction, "LB communication" )
<< Sweep( MyBoundaryHandling<LatticeModel_T>::BoundaryHandling_T::getBlockSweep( boundaryHandlingId ), "LB boundary sweep" );
timeloop.add() << Sweep( lbm::StreamSweep< Sweep_T >( sweep ), "split LB sweep (stream)" );
}
}
else
{
auto sweep = lbm::makeCellwiseSweep< LatticeModel_T, FlagField_T >( pdfFieldId, flagFieldId, Fluid_Flag );
timeloop.add() << Sweep( lbm::makeCollideSweep( sweep ), "cell-wise LB sweep (collide)" );
timeloop.add() << BeforeFunction( commFunction, "LB communication" )
<< Sweep( MyBoundaryHandling<LatticeModel_T>::BoundaryHandling_T::getBlockSweep( boundaryHandlingId ), "LB boundary sweep" );
timeloop.add() << Sweep( lbm::makeStreamSweep( sweep ), "cell-wise LB sweep (stream)" );
}
}
}
};
template< typename LatticeModel_T >
struct AddLB< LatticeModel_T, typename boost::enable_if_c< boost::mpl::or_<
boost::is_same< typename LatticeModel_T::CollisionModel::tag,
lbm::collision_model::MRT_tag >,
boost::is_same< typename LatticeModel_T::CollisionModel::tag,
lbm::collision_model::Cumulant_tag >
>::value >::type >
{
using PdfField = typename Types< LatticeModel_T >::PdfField_T;
using CommunicationStencil = typename Types< LatticeModel_T >::CommunicationStencil_T;
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static void add( shared_ptr< blockforest::StructuredBlockForest > & blocks, SweepTimeloop & timeloop,
const BlockDataID & pdfFieldId, const BlockDataID & flagFieldId, const BlockDataID & boundaryHandlingId,
const bool /*split*/, const bool /*pure*/, const bool fullComm, const bool fused, const bool directComm )
{
// setup of the LB communication for synchronizing the pdf field between neighboring blocks
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if( directComm )
{
if( fullComm )
{
blockforest::communication::UniformDirectScheme< stencil::D3Q27 > comm( blocks );
auto mpiDatatypeInfo = make_shared<field::communication::UniformMPIDatatypeInfo< PdfField > >( pdfFieldId );
comm.addDataToCommunicate( mpiDatatypeInfo );
commFunction = comm;
}
else
{
blockforest::communication::UniformDirectScheme< CommunicationStencil > comm( blocks );
auto mpiDatatypeInfo = make_shared<lbm::communication::PdfFieldMPIDatatypeInfo< PdfField > >( pdfFieldId );
comm.addDataToCommunicate( mpiDatatypeInfo );
commFunction = comm;
}
}
else
{
if( fullComm )
{
blockforest::communication::UniformBufferedScheme< stencil::D3Q27 > scheme( blocks );
scheme.addPackInfo( make_shared< field::communication::PackInfo< PdfField > >( pdfFieldId ) );
commFunction = scheme;
}
else
{
blockforest::communication::UniformBufferedScheme< CommunicationStencil > scheme( blocks );
scheme.addPackInfo( make_shared< lbm::PdfFieldPackInfo< LatticeModel_T > >( pdfFieldId ) );
commFunction = scheme;
}
}
if( fused )
{
timeloop.add() << BeforeFunction( commFunction, "LB communication" )
<< Sweep( MyBoundaryHandling<LatticeModel_T>::BoundaryHandling_T::getBlockSweep( boundaryHandlingId ), "LB boundary sweep" );
timeloop.add() << Sweep( makeSharedSweep( lbm::makeCellwiseSweep< LatticeModel_T, FlagField_T >( pdfFieldId, flagFieldId, Fluid_Flag ) ), "cell-wise LB sweep (stream & collide)" );
}
else
{
auto sweep = lbm::makeCellwiseSweep< LatticeModel_T, FlagField_T >( pdfFieldId, flagFieldId, Fluid_Flag );
timeloop.add() << Sweep( lbm::makeCollideSweep( sweep ), "cell-wise LB sweep (collide)" );
timeloop.add() << BeforeFunction( commFunction, "LB communication" )
<< Sweep( MyBoundaryHandling<LatticeModel_T>::BoundaryHandling_T::getBlockSweep( boundaryHandlingId ), "LB boundary sweep" );
timeloop.add() << Sweep( lbm::makeStreamSweep( sweep ), "cell-wise LB sweep (stream)" );
}
}
};
template< typename LatticeModel_T >
void run( const shared_ptr< Config > & config, const LatticeModel_T & latticeModel,
const bool split, const bool pure, const bool fzyx, const bool fullComm, const bool fused, const bool directComm )
{
using PdfField = typename Types<LatticeModel_T>::PdfField_T;
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Config::BlockHandle configBlock = config->getBlock( "UniformGrid" );
// creating the block structure
auto blocks = createStructuredBlockForest( configBlock );
// add pdf field to blocks
BlockDataID pdfFieldId = fzyx ? lbm::addPdfFieldToStorage( blocks, "pdf field (fzyx)", latticeModel,
Vector3< real_t >( real_c(0), real_c(0), real_c(0) ), real_t(1),
FieldGhostLayers, field::fzyx ) :
lbm::addPdfFieldToStorage( blocks, "pdf field (zyxf)", latticeModel,
Vector3< real_t >( real_c(0), real_c(0), real_c(0) ), real_t(1),
FieldGhostLayers, field::zyxf );
// add flag field to blocks
BlockDataID flagFieldId = field::addFlagFieldToStorage< FlagField_T >( blocks, "flag field" );
// add LB boundary handling to blocks
const real_t velocity = configBlock.getParameter< real_t >( "velocity", real_t(0.05) );
BlockDataID boundaryHandlingId = blocks->template addStructuredBlockData< typename MyBoundaryHandling< LatticeModel_T >::BoundaryHandling_T >(
MyBoundaryHandling< LatticeModel_T >( flagFieldId, pdfFieldId, velocity ), "boundary handling" );
// creating the time loop
const uint_t outerTimeSteps = configBlock.getParameter< uint_t >( "outerTimeSteps", uint_c(1 ) );
const uint_t innerTimeSteps = configBlock.getParameter< uint_t >( "innerTimeSteps", uint_c(10) );
SweepTimeloop timeloop( blocks->getBlockStorage(), outerTimeSteps * innerTimeSteps );
// VTK
blockforest::communication::UniformBufferedScheme< stencil::D3Q27 > pdfGhostLayerSync( blocks );
pdfGhostLayerSync.addPackInfo( make_shared< field::communication::PackInfo< PdfField > >( pdfFieldId ) );
MyVTKOutput< LatticeModel_T > myVTKOutput( pdfFieldId, flagFieldId, pdfGhostLayerSync );
std::map< std::string, vtk::SelectableOutputFunction > vtkOutputFunctions;
vtk::initializeVTKOutput( vtkOutputFunctions, myVTKOutput, blocks, config );
for( auto output = vtkOutputFunctions.begin(); output != vtkOutputFunctions.end(); ++output )
timeloop.addFuncBeforeTimeStep( output->second.outputFunction, std::string("VTK: ") + output->first,
output->second.requiredGlobalStates, output->second.incompatibleGlobalStates );
// add LB kernel, boundary handling, and communication to time loop
AddLB< LatticeModel_T >::add( blocks, timeloop, pdfFieldId, flagFieldId, boundaryHandlingId, split, pure, fullComm, fused, directComm );
// logging right before the benchmark starts
lbm::BlockForestEvaluation< FlagField_T > blockForest( blocks, flagFieldId, Fluid_Flag );
blockForest.logInfoOnRoot();
WALBERLA_LOG_INFO_ON_ROOT( "Benchmark parameters:"
"\n- collision model: " << CollisionModelString< LatticeModel_T >::str() <<
"\n- stencil: " << StencilString< LatticeModel_T >::str() <<
"\n- compressible: " << ( LatticeModel_T::compressible ? "yes" : "no" ) <<
"\n- fused (stream & collide) kernel: " << ( fused ? "yes" : "no" ) <<
"\n- split (collision) kernel: " << ( split ? "yes" : "no" ) <<
"\n- pure kernel: " << ( pure ? "yes (collision is also performed within obstacle cells)" : "no" ) <<
"\n- data layout: " << ( fzyx ? "fzyx (structure of arrays [SoA])" : "zyxf (array of structures [AoS])" ) <<
"\n- communication: " << ( fullComm ? "full synchronization" : "direction-aware optimizations" ) <<
"\n- direct communication: " << ( directComm ? "enabled" : "disabled" ) );
// run the benchmark
lbm::PerformanceEvaluation< FlagField_T > performance( blocks, flagFieldId, Fluid_Flag );
for( uint_t outerRun = 0; outerRun < outerTimeSteps; ++outerRun )
{
WcTimingPool timeloopTiming;
WALBERLA_MPI_WORLD_BARRIER();
WcTimer timer;
timer.start();
for( uint_t innerRun = 0; innerRun < innerTimeSteps; ++innerRun )
timeloop.singleStep( timeloopTiming );
timer.end();
double time = timer.max();
mpi::reduceInplace( time, mpi::MAX );
const auto reducedTimeloopTiming = timeloopTiming.getReduced();
WALBERLA_LOG_RESULT_ON_ROOT( "Time loop timing:\n" << *reducedTimeloopTiming );
performance.logResultOnRoot( innerTimeSteps, time );
WALBERLA_ROOT_SECTION()
{
// logging in SQL database
if( configBlock.getParameter< bool >( "logToSqlDB", true ) )
{
const std::string sqlFile = configBlock.getParameter< std::string >( "sqlFile", "performance.sqlite" );
std::map< std::string, int > integerProperties;
std::map< std::string, double > realProperties;
std::map< std::string, std::string > stringProperties;
performance.getResultsForSQLOnRoot( integerProperties, realProperties, stringProperties, innerTimeSteps, time );
blockForest.getResultsForSQLOnRoot( integerProperties, realProperties, stringProperties );
stringProperties[ "collisionModel" ] = CollisionModelString< LatticeModel_T >::str();
stringProperties[ "stencil" ] = StencilString< LatticeModel_T >::str();
stringProperties[ "compressible" ] = ( LatticeModel_T::compressible ? "yes" : "no" );
stringProperties[ "fusedKernel" ] = ( fused ? "yes" : "no" );
stringProperties[ "splitKernel" ] = ( split ? "yes" : "no" );
stringProperties[ "pureKernel" ] = ( pure ? "yes" : "no" );
stringProperties[ "dataLayout" ] = ( fzyx ? "fzyx" : "zyxf" );
stringProperties[ "fullCommunication" ] = ( fullComm ? "yes" : "no" );
stringProperties[ "directComm"] = ( directComm ? "yes" : "no" );
auto runId = postprocessing::storeRunInSqliteDB( sqlFile, integerProperties, stringProperties, realProperties );
postprocessing::storeTimingPoolInSqliteDB( sqlFile, runId, *reducedTimeloopTiming, "Timeloop" );
}
}
}
// logging once again at the end of the simulation, identical to logging at the beginning :-)
blockForest.logInfoOnRoot();
WALBERLA_LOG_INFO_ON_ROOT( "Benchmark parameters:"
"\n- collision model: " << CollisionModelString< LatticeModel_T >::str() <<
"\n- stencil: " << StencilString< LatticeModel_T >::str() <<
"\n- compressible: " << ( LatticeModel_T::compressible ? "yes" : "no" ) <<
"\n- fused (stream & collide) kernel: " << ( fused ? "yes" : "no" ) <<
"\n- split (collision) kernel: " << ( split ? "yes" : "no" ) <<
"\n- pure kernel: " << ( pure ? "yes (collision is also performed within obstacle cells)" : "no" ) <<
"\n- data layout: " << ( fzyx ? "fzyx (structure of arrays [SoA])" : "zyxf (array of structures [AoS])" ) <<
"\n- communication: " << ( fullComm ? "full synchronization" : "direction-aware optimizations" ) <<
"\n- direct communication: " << ( directComm ? "enabled" : "disabled" ) );
}
//////////
// MAIN //
//////////
enum CM { CMSRT, CMTRT, CMMRT, CMCUM };
int main( int argc, char **argv )
{
mpi::Environment env( argc, argv );
if( argc < 2 )
{
WALBERLA_ROOT_SECTION()
{
std::cout << "Usage: " << argv[0] << " path-to-configuration-file [--trt | --mrt] [--comp] [--not-split] [--not-pure] [--zyxf] [--full-comm] [--not-fused] [--direct-comm]\n"
"\n"
"By default, SRT is selected as collision model, a communication with direction-aware optimizations is chosen, and an\n"
"incompressible, split, pure LB kernel is executed on a PDF field with layout 'fzyx' (= structure of arrays [SoA]).\n"
"\n"
"Optional arguments:\n"
" --trt: collision model = TRT\n"
" --mrt: collision model = MRT\n"
" --cumulant collision model = cumulant\n"
" --comp: LB kernel is switched from incompressible to compressible\n"
" --not-split: LB kernel NOT split by PDF direction but executed cell by cell\n"
" --not-pure: LB kernel is only executed in fluid cells, not in obstacle/boundary cells.\n"
" Will be automatically selected for non-split LB kernels.\n"
" --zyxf: data layout switched to 'zyxf' (array of structures [AoS])\n"
" Probably the best layout for non-split kernels.\n"
" --full-comm: A full synchronization of neighboring blocks is performed instead of using a communication\n"
" that uses direction-aware optimizations.\n"
" --not-fused: Selects separate LB kernels for collision and streaming.\n"
" By default, a 'fused' stream & collide kernel is used.\n"
" --direct-comm: Enables bufferless direct communication\n"
"\n"
"Please note: For small/very small blocks (i.e., blocks with only few cells), the best performance may be achieved with\n"
" basic (non-split), incompressible LB kernels combined with an array of structures ('zyxf') data layout!" << std::endl;
}
return EXIT_SUCCESS;
}
logging::Logging::printHeaderOnStream();
//WALBERLA_ROOT_SECTION() { logging::Logging::instance()->setLogLevel( logging::Logging::PROGRESS ); }
#ifdef _OPENMP
if( std::getenv( "OMP_NUM_THREADS" ) == nullptr )
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WALBERLA_ABORT( "If you are using a version of the benchmark that was compiled with OpenMP you have to "
"specify the environment variable \'OMP_NUM_THREADS\' accordingly!" );
#endif
// open configuration file
shared_ptr< Config > config = make_shared< Config >();
config->readParameterFile( argv[1] );
Config::BlockHandle configBlock = config->getBlock( "UniformGrid" );
if( !configBlock )
WALBERLA_ABORT( "You have to specify a \"UniformGrid\" block in the configuration file!" );
// In case 'sbffile' and 'processes' are specified in the configuration file:
// -> just create the block structure and save it to file for later use
if( configBlock.isDefined( "sbffile" ) && configBlock.isDefined( "processes" ) )
{
std::string sbffile = configBlock.getParameter< std::string >( "sbffile" );
const uint_t numberOfProcesses = configBlock.getParameter< uint_t >( "processes" );
const uint_t blocksPerProcess = configBlock.getParameter< uint_t >( "blocksPerProcess", uint_t( 1 ) );
std::ostringstream infoString;
infoString << "You have selected the option of just creating the block structure (= domain decomposition) and saving the result to file\n"
"by specifying the output file name \'" << sbffile << "\' AND providing a targeted number of processes ("
<< numberOfProcesses << ").\n";
if( MPIManager::instance()->numProcesses() > 1 )
WALBERLA_ABORT( infoString.str() << "In this mode you need to start " << argv[0] << " with just one process!" );
WALBERLA_LOG_INFO_ON_ROOT( infoString.str() << "Creating the block structure ..." );
blockforest::SetupBlockForest sforest;
createSetupBlockForest( sforest, configBlock, numberOfProcesses, blocksPerProcess );
sforest.saveToFile( sbffile.c_str() );
logging::Logging::printFooterOnStream();
return EXIT_SUCCESS;
}
// reading optional parameters from passed arguments
CM collisionModel = CMSRT;
bool compressible = false;
bool split = true;
bool pure = true;
bool fzyx = true;
bool fullComm = false;
bool fused = true;
bool directComm = false;
for( int i = 2; i < argc; ++i )
{
if( std::strcmp( argv[i], "--trt" ) == 0 ) collisionModel = CMTRT;
if( std::strcmp( argv[i], "--mrt" ) == 0 ) collisionModel = CMMRT;
if( std::strcmp( argv[i], "--cumulant" ) == 0 ) collisionModel = CMCUM;
if( std::strcmp( argv[i], "--comp" ) == 0 ) compressible = true;
if( std::strcmp( argv[i], "--not-split" ) == 0 ) split = false;
if( std::strcmp( argv[i], "--not-pure" ) == 0 ) pure = false;
if( std::strcmp( argv[i], "--zyxf" ) == 0 ) fzyx = false;
if( std::strcmp( argv[i], "--full-comm" ) == 0 ) fullComm = true;
if( std::strcmp( argv[i], "--not-fused" ) == 0 ) fused = false;
if( std::strcmp( argv[i], "--direct-comm" ) == 0 ) directComm = true;
}
if( pure && !split )
{
WALBERLA_LOG_WARNING_ON_ROOT( "You called the benchmark with \"--not-split\" but without \"--not-pure\".\n"
"\"Pure\" kernels are only available for \"split\" kernels! Setting \"pure\" to false ..." );
pure = pure && split; // pure only works in combination with split
}
if( collisionModel == CMMRT && ( compressible || split || pure ) )
{
WALBERLA_LOG_WARNING_ON_ROOT( "Option \"--comp\" is not available for MRT! Also, MRT requires options \"--not-split\" and \"--not-pure\"!\n"
"Setting \"compressible\", \"split\", and \"pure\" to false ..." );
compressible = false;
split = false;
pure = false;
}
if( collisionModel == CMCUM && ( compressible || split || pure ) )
{
WALBERLA_LOG_WARNING_ON_ROOT( "Option \"--comp\" has to be set for Cumulant! Also, Cumulant requires options \"--not-split\" and \"--not-pure\"!\n"
"Setting \"compressible\", to true, \"split\", and \"pure\" to false ..." );
compressible = true;
split = false;
pure = false;
}
WALBERLA_NON_MPI_SECTION()
{
if( directComm )
{
WALBERLA_LOG_WARNING_ON_ROOT( "Direct (bufferless) communication is not available when building with MPI disabled.\n"
"Switching to buffered comm..." );
}
directComm = false;
}
const real_t omega = configBlock.getParameter< real_t >( "omega", real_t(1.4) ); // on the coarsest grid!
// executing benchmark
if( collisionModel == CMSRT ) // SRT
{
if( compressible )
{
D3Q19_SRT_COMP latticeModel = D3Q19_SRT_COMP( lbm::collision_model::SRT( omega ) );
run( config, latticeModel, split, pure, fzyx, fullComm, fused, directComm );
}
else
{
D3Q19_SRT_INCOMP latticeModel = D3Q19_SRT_INCOMP( lbm::collision_model::SRT( omega ) );
run( config, latticeModel, split, pure, fzyx, fullComm, fused, directComm );
}
}
else if( collisionModel == CMTRT ) // TRT
{
if( compressible )
{
D3Q19_TRT_COMP latticeModel = D3Q19_TRT_COMP( lbm::collision_model::TRT::constructWithMagicNumber( omega ) );
run( config, latticeModel, split, pure, fzyx, fullComm, fused, directComm );
}
else
{
D3Q19_TRT_INCOMP latticeModel = D3Q19_TRT_INCOMP( lbm::collision_model::TRT::constructWithMagicNumber( omega ) );
run( config, latticeModel, split, pure, fzyx, fullComm, fused, directComm );
}
}
else if( collisionModel == CMMRT ) // MRT
{
D3Q19_MRT_INCOMP latticeModel = D3Q19_MRT_INCOMP( lbm::collision_model::D3Q19MRT::constructTRTWithMagicNumber( omega ) );
run( config, latticeModel, split, pure, fzyx, fullComm, fused, directComm );
}
else // Cumulant
{
D3Q27_CUMULANT_COMP latticeModel = D3Q27_CUMULANT_COMP( lbm::collision_model::D3Q27Cumulant(omega) );
run( config, latticeModel, split, pure, fzyx, fullComm, fused, directComm );