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scalability_test.cc
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/**
* @file scalability_test.cc
* @author Nicolas Richart <nicolas.richart@epfl.ch>
* @date Tue Feb 22 09:35:58 2011
*
* @brief Test de scalability
*
* @section LICENSE
*
* Copyright (©) 2010-2011 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include <limits>
#include <fstream>
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "mesh.hh"
#include "mesh_io.hh"
#include "mesh_io_msh.hh"
#include "solid_mechanics_model.hh"
#include "material.hh"
#include "static_communicator.hh"
#include "distributed_synchronizer.hh"
#include "mesh_partition_scotch.hh"
/* -------------------------------------------------------------------------- */
// #ifdef AKANTU_USE_IOHELPER
// # include "io_helper.h"
// #endif //AKANTU_USE_IOHELPER
using namespace akantu;
int main(int argc, char *argv[])
{
akantu::debug::setDebugLevel(akantu::dblWarning);
initialize(&argc, &argv);
StaticCommunicator * comm = akantu::StaticCommunicator::getStaticCommunicator();
Int psize = comm->getNbProc();
Int prank = comm->whoAmI();
/* -------------------------------------------------------------------------- */
UInt spatial_dimension = 2;
ElementType type = _quadrangle_4;
UInt max_steps = 100;
Real time_factor = 0.2;
UInt nex = 100, ney = 100 * psize;
Real height = 1., width = 1. * psize;
if(argc == 3 || argc == 4) {
nex = atoi(argv[1]);
ney = atoi(argv[2]);
width = ney / 100.;
if(argc == 4) {
max_steps = atoi(argv[3]);
}
} else if (argc != 1) {
std::cout << "Usage : " << argv[0] << " [nb_x (default 100) nb_y (default 100 * nb proc)] [nb_step (default 100)]" << std::endl;
exit(EXIT_FAILURE);
}
/* ------------------------------------------------------------------------ */
// Real epot, ekin;
Mesh mesh(spatial_dimension);
if(prank == 0) {
std::cout << "Generating mesh..." << std::endl;
Real height_el = height / nex;
Real width_el = width / ney;
UInt nnx = nex + 1, nny = ney + 1;
Vector<Real> & nodes = const_cast<Vector<Real> &>(mesh.getNodes());
nodes.resize(nnx * nny);
mesh.addConnecticityType(type);
Vector<UInt> & connectivity = const_cast<Vector<UInt> &>(mesh.getConnectivity(type));
connectivity.resize(nex * ney);
for (UInt i = 0; i < nny; ++i) {
for (UInt j = 0; j < nnx; ++j) {
UInt n = i * nnx + j;
nodes.at(n, 0) = i * width_el;
nodes.at(n, 1) = j * height_el;
}
}
for (UInt i = 0; i < ney; ++i) {
for (UInt j = 0; j < nex; ++j) {
UInt e = i * nex + j;
connectivity.at(e, 0) = i * nnx + j;
connectivity.at(e, 1) = (i + 1) * nnx + j;
connectivity.at(e, 2) = (i + 1) * nnx + (j + 1);
connectivity.at(e, 3) = i * nnx + j + 1;
}
}
akantu::MeshIOMSH mesh_io;
mesh_io.write("bar.msh", mesh);
}
MPI_Barrier(MPI_COMM_WORLD);
akantu::MeshPartition * partition = NULL;
if(prank == 0) {
std::cout << "Partitioning mesh..." << std::endl;
partition = new akantu::MeshPartitionScotch(mesh, spatial_dimension);
partition->partitionate(psize);
}
akantu::SolidMechanicsModel * model = new akantu::SolidMechanicsModel(mesh);
model->initParallel(partition);
/// model initialization
model->initVectors();
/// set vectors to 0
akantu::UInt nb_nodes = model->getFEM().getMesh().getNbNodes();
memset(model->getForce().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
memset(model->getVelocity().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
memset(model->getAcceleration().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
memset(model->getDisplacement().values, 0,
spatial_dimension*nb_nodes*sizeof(akantu::Real));
model->initExplicit();
model->initModel();
model->readMaterials("material.dat");
model->initMaterials();
model->assembleMassLumped();
// std::cout << model->getMaterial(0) << std::endl;
/// boundary conditions
akantu::Real eps = 1e-16;
for (akantu::UInt i = 0; i < nb_nodes; ++i) {
if(model->getFEM().getMesh().getNodes().values[spatial_dimension*i] >= (width * .9))
model->getDisplacement().values[spatial_dimension*i] = (model->getFEM().getMesh().getNodes().values[spatial_dimension*i] - .9 * width) / 100. ;
if(model->getFEM().getMesh().getNodes().values[spatial_dimension*i] <= eps)
model->getBoundary().values[spatial_dimension*i] = true;
if(model->getFEM().getMesh().getNodes().values[spatial_dimension*i + 1] <= eps ||
model->getFEM().getMesh().getNodes().values[spatial_dimension*i + 1] >= (height - eps) ) {
model->getBoundary().values[spatial_dimension*i + 1] = true;
}
}
// #ifdef AKANTU_USE_IOHELPER
// akantu::UInt paraview_type = QUAD1;
// double * part;
// akantu::UInt nb_element = model->getFEM().getMesh().getNbElement(type);
// /// set to 0 only for the first paraview dump
// memset(model->getResidual().values, 0,
// spatial_dimension*nb_nodes*sizeof(akantu::Real));
// memset(model->getMaterial(0).getStrain(type).values, 0,
// spatial_dimension*spatial_dimension*nb_element*sizeof(akantu::Real));
// memset(model->getMaterial(0).getStress(type).values, 0,
// spatial_dimension*spatial_dimension*nb_element*sizeof(akantu::Real));
// DumperParaview dumper;
// dumper.SetMode(BASE64);
// dumper.SetParallelContext(prank, psize);
// dumper.SetPoints(model->getFEM().getMesh().getNodes().values,
// spatial_dimension, nb_nodes, "coordinates");
// dumper.SetConnectivity((int *)model->getFEM().getMesh().getConnectivity(type).values,
// paraview_type, nb_element, C_MODE);
// dumper.AddNodeDataField(model->getDisplacement().values,
// spatial_dimension, "displacements");
// dumper.AddNodeDataField(model->getVelocity().values,
// spatial_dimension, "velocity");
// dumper.AddNodeDataField(model->getResidual().values,
// spatial_dimension, "force");
// dumper.AddElemDataField(model->getMaterial(0).getStrain(type).values,
// spatial_dimension*spatial_dimension, "strain");
// dumper.AddElemDataField(model->getMaterial(0).getStress(type).values,
// spatial_dimension*spatial_dimension, "stress");
// akantu::UInt nb_quadrature_points = model->getFEM().getNbQuadraturePoints(type);
// part = new double[nb_element*nb_quadrature_points];
// for (unsigned int i = 0; i < nb_element; ++i)
// for (unsigned int q = 0; q < nb_quadrature_points; ++q)
// part[i*nb_quadrature_points + q] = prank;
// dumper.AddElemDataField(part, 1, "partitions");
// dumper.SetEmbeddedValue("displacements", 1);
// dumper.SetPrefix("paraview/");
// dumper.Init();
// dumper.Dump();
// #endif //AKANTU_USE_IOHELPER
akantu::Real time_step = model->getStableTimeStep() * time_factor;
model->setTimeStep(time_step);
// std::ofstream energy;
// energy.open("energy.csv");
// energy << "id,epot,ekin,tot" << std::endl;
double total_time = 0.;
if(prank == 0) {
std::cout << "Time Step = " << time_step << "s" << std::endl;
std::cerr << "passing step " << 0 << "/" << max_steps << std::endl;
}
for(akantu::UInt s = 1; s <= max_steps; ++s) {
double start = MPI_Wtime();
model->explicitPred();
model->updateResidual();
model->updateAcceleration();
model->explicitCorr();
double end = MPI_Wtime();
total_time += end - start;
// epot = model->getPotentialEnergy();
// ekin = model->getKineticEnergy();
if(s % (std::max(1,(int)max_steps/10)) == 0 && prank == 0) {
std::cerr << "passing step " << s << "/" << max_steps << std::endl;
}
// energy << s << "," << epot << "," << ekin << "," << epot + ekin
// << std::endl;
// #ifdef AKANTU_USE_IOHELPER
// if(s % 10 == 0) {
// dumper.Dump();
// }
// #endif //AKANTU_USE_IOHELPER
}
if(prank == 0) std::cout << "Time : " << psize << " " << total_time / max_steps << " " << total_time << std::endl;
// #ifdef AKANTU_USE_IOHELPER
// delete [] part;
// #endif //AKANTU_USE_IOHELPER
// energy.close();
finalize();
return EXIT_SUCCESS;
}

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