void RBConstructionBase<Base>::get_global_max_error_pair(const Parallel::Communicator &communicator,
std::pair<unsigned int, Real>& error_pair)
{
// Set error_pair.second to the maximum global value and also
// find which processor contains the maximum value
unsigned int proc_ID_index;
communicator.maxloc(error_pair.second, proc_ID_index);
// Then broadcast error_pair.first from proc_ID_index
communicator.broadcast(error_pair.first, proc_ID_index);
}
Sort<KeyType,IdxType>::Sort(const Parallel::Communicator &comm_in,
std::vector<KeyType>& d) :
ParallelObject(comm_in),
_n_procs(comm_in.size()),
_proc_id(comm_in.rank()),
_bin_is_sorted(false),
_data(d)
{
std::sort(_data.begin(), _data.end());
// Allocate storage
_local_bin_sizes.resize(_n_procs);
}
std::string
PETScConfigurable::p_generatePrefix(const parallel::Communicator& comm)
{
std::string result;
if (comm.rank() == 0) {
result = p_generatePrefix();
}
boost::mpi::broadcast(comm, result, 0);
return result;
}
// ErrorEstimator functions
void ErrorEstimator::reduce_error (std::vector<ErrorVectorReal> & error_per_cell,
const Parallel::Communicator & comm) const
{
// This function must be run on all processors at once
// parallel_object_only();
// Each processor has now computed the error contributions
// for its local elements. We may need to sum the vector to
// recover the error for each element.
comm.sum(error_per_cell);
}
void
parallelBarrierNotify(const Parallel::Communicator & comm)
{
processor_id_type slave_processor_id;
if (comm.rank() == 0)
{
// The master process is already through, so report it
Moose::out << "Jobs complete: 1/" << comm.size() << (1 == comm.size() ? "\n" : "\r") << std::flush;
for (unsigned int i=2; i<=comm.size(); ++i)
{
comm.receive(MPI_ANY_SOURCE, slave_processor_id);
Moose::out << "Jobs complete: " << i << "/" << comm.size() << (i == comm.size() ? "\n" : "\r") << std::flush;
}
}
else
{
slave_processor_id = comm.rank();
comm.send(0, slave_processor_id);
}
comm.barrier();
}
void RBConstructionBase<Base>::generate_training_parameters_deterministic(const Parallel::Communicator &communicator,
std::map<std::string, bool> log_param_scale,
std::map< std::string, NumericVector<Number>* >& training_parameters_in,
unsigned int n_training_samples_in,
const RBParameters& min_parameters,
const RBParameters& max_parameters,
bool serial_training_set)
{
libmesh_assert_equal_to ( min_parameters.n_parameters(), max_parameters.n_parameters() );
const unsigned int num_params = min_parameters.n_parameters();
if (num_params == 0)
return;
if(num_params > 2)
{
libMesh::out << "ERROR: Deterministic training sample generation "
<< " not implemented for more than two parameters." << std::endl;
libmesh_not_implemented();
}
// Clear training_parameters_in
{
std::map< std::string, NumericVector<Number>* >::iterator it = training_parameters_in.begin();
std::map< std::string, NumericVector<Number>* >::const_iterator it_end = training_parameters_in.end();
for ( ; it != it_end; ++it)
{
NumericVector<Number>* training_vector = it->second;
delete training_vector;
training_vector = NULL;
}
}
// Initialize training_parameters_in
{
RBParameters::const_iterator it = min_parameters.begin();
RBParameters::const_iterator it_end = min_parameters.end();
for( ; it != it_end; ++it)
{
std::string param_name = it->first;
training_parameters_in[param_name] = NumericVector<Number>::build(communicator).release();
if(!serial_training_set)
{
// Calculate the number of training parameters local to this processor
unsigned int n_local_training_samples;
unsigned int quotient = n_training_samples_in/communicator.size();
unsigned int remainder = n_training_samples_in%communicator.size();
if(communicator.rank() < remainder)
n_local_training_samples = (quotient + 1);
else
n_local_training_samples = quotient;
training_parameters_in[param_name]->init(n_training_samples_in, n_local_training_samples, false, PARALLEL);
}
else
{
training_parameters_in[param_name]->init(n_training_samples_in, false, SERIAL);
}
}
}
if(num_params == 1)
{
NumericVector<Number>* training_vector = training_parameters_in.begin()->second;
bool use_log_scaling = log_param_scale.begin()->second;
Real min_param = min_parameters.begin()->second;
Real max_param = max_parameters.begin()->second;
numeric_index_type first_index = training_vector->first_local_index();
for(numeric_index_type i=0; i<training_vector->local_size(); i++)
{
numeric_index_type index = first_index+i;
if(use_log_scaling)
{
Real epsilon = 1.e-6; // Prevent rounding errors triggering asserts
Real log_min = log10(min_param + epsilon);
Real log_range = log10( (max_param-epsilon) / (min_param+epsilon) );
Real step_size = log_range /
std::max((unsigned int)1,(n_training_samples_in-1));
if(index<(n_training_samples_in-1))
{
training_vector->set(index, pow(10., log_min + index*step_size ));
}
else
{
// due to rounding error, the last parameter can be slightly
// bigger than max_parameters, hence snap back to the max
training_vector->set(index, max_param);
}
}
else
{
// Generate linearly scaled training parameters
Real step_size = (max_param - min_param) /
std::max((unsigned int)1,(n_training_samples_in-1));
training_vector->set(index, index*step_size + min_param);
}
}
}
// This is for two parameters
if(num_params == 2)
{
// First make sure n_training_samples_in is a square number
unsigned int n_training_parameters_per_var = static_cast<unsigned int>( std::sqrt(static_cast<Real>(n_training_samples_in)) );
if( (n_training_parameters_per_var*n_training_parameters_per_var) != n_training_samples_in)
libmesh_error_msg("Error: Number of training parameters = " \
<< n_training_samples_in \
<< ".\n" \
<< "Deterministic training set generation with two parameters requires\n " \
<< "the number of training parameters to be a perfect square.");
// make a matrix to store all the parameters, put them in vector form afterwards
std::vector< std::vector<Real> > training_parameters_matrix(num_params);
RBParameters::const_iterator it = min_parameters.begin();
RBParameters::const_iterator it_end = min_parameters.end();
unsigned int i = 0;
for( ; it != it_end; ++it)
{
std::string param_name = it->first;
Real min_param = it->second;
bool use_log_scaling = log_param_scale[param_name];
Real max_param = max_parameters.get_value(param_name);
training_parameters_matrix[i].resize(n_training_parameters_per_var);
for(unsigned int j=0; j<n_training_parameters_per_var; j++)
{
// Generate log10 scaled training parameters
if(use_log_scaling)
{
Real epsilon = 1.e-6; // Prevent rounding errors triggering asserts
Real log_min = log10(min_param + epsilon);
Real log_range = log10( (max_param-epsilon) / (min_param+epsilon) );
Real step_size = log_range /
std::max((unsigned int)1,(n_training_parameters_per_var-1));
if(j<(n_training_parameters_per_var-1))
{
training_parameters_matrix[i][j] = pow(10., log_min + j*step_size );
}
else
{
// due to rounding error, the last parameter can be slightly
// bigger than max_parameters, hence snap back to the max
training_parameters_matrix[i][j] = max_param;
}
}
else
{
// Generate linearly scaled training parameters
Real step_size = (max_param - min_param) /
std::max((unsigned int)1,(n_training_parameters_per_var-1));
training_parameters_matrix[i][j] = j*step_size + min_param;
}
}
i++;
}
// now load into training_samples_in:
std::map<std::string, NumericVector<Number>*>::iterator new_it = training_parameters_in.begin();
NumericVector<Number>* training_vector_0 = new_it->second;
++new_it;
NumericVector<Number>* training_vector_1 = new_it->second;
for(unsigned int index1=0; index1<n_training_parameters_per_var; index1++)
{
for(unsigned int index2=0; index2<n_training_parameters_per_var; index2++)
{
unsigned int index = index1*n_training_parameters_per_var + index2;
if( (training_vector_0->first_local_index() <= index) &&
(index < training_vector_0->last_local_index()) )
{
training_vector_0->set(index, training_parameters_matrix[0][index1]);
training_vector_1->set(index, training_parameters_matrix[1][index2]);
}
}
}
// libMesh::out << "n_training_samples = " << n_training_samples_in << std::endl;
// for(unsigned int index=0; index<n_training_samples_in; index++)
// {
// libMesh::out << "training parameters for index="<<index<<":"<<std::endl;
// for(unsigned int param=0; param<num_params; param++)
// {
// libMesh::out << " " << (*training_parameters_in[param])(index);
// }
// libMesh::out << std::endl << std::endl;
// }
}
}
void RBConstructionBase<Base>::generate_training_parameters_random(const Parallel::Communicator &communicator,
std::map<std::string, bool> log_param_scale,
std::map< std::string, NumericVector<Number>* >& training_parameters_in,
unsigned int n_training_samples_in,
const RBParameters& min_parameters,
const RBParameters& max_parameters,
int training_parameters_random_seed,
bool serial_training_set)
{
libmesh_assert_equal_to ( min_parameters.n_parameters(), max_parameters.n_parameters() );
const unsigned int num_params = min_parameters.n_parameters();
// Clear training_parameters_in
{
std::map< std::string, NumericVector<Number>* >::iterator it = training_parameters_in.begin();
std::map< std::string, NumericVector<Number>* >::const_iterator it_end = training_parameters_in.end();
for ( ; it != it_end; ++it)
{
NumericVector<Number>* training_vector = it->second;
delete training_vector;
training_vector = NULL;
}
training_parameters_in.clear();
}
if (num_params == 0)
return;
if (training_parameters_random_seed < 0)
{
if(!serial_training_set)
{
// seed the random number generator with the system time
// and the processor ID so that the seed is different
// on different processors
std::srand( static_cast<unsigned>( std::time(0)*(1+communicator.rank()) ));
}
else
{
// seed the random number generator with the system time
// only so that the seed is the same on all processors
std::srand( static_cast<unsigned>( std::time(0) ));
}
}
else
{
if(!serial_training_set)
{
// seed the random number generator with the provided value
// and the processor ID so that the seed is different
// on different processors
std::srand( static_cast<unsigned>( training_parameters_random_seed*(1+communicator.rank()) ));
}
else
{
// seed the random number generator with the provided value
// so that the seed is the same on all processors
std::srand( static_cast<unsigned>( training_parameters_random_seed ));
}
}
// initialize training_parameters_in
{
RBParameters::const_iterator it = min_parameters.begin();
RBParameters::const_iterator it_end = min_parameters.end();
for( ; it != it_end; ++it)
{
std::string param_name = it->first;
training_parameters_in[param_name] = NumericVector<Number>::build(communicator).release();
if(!serial_training_set)
{
// Calculate the number of training parameters local to this processor
unsigned int n_local_training_samples;
unsigned int quotient = n_training_samples_in/communicator.size();
unsigned int remainder = n_training_samples_in%communicator.size();
if(communicator.rank() < remainder)
n_local_training_samples = (quotient + 1);
else
n_local_training_samples = quotient;
training_parameters_in[param_name]->init(n_training_samples_in, n_local_training_samples, false, PARALLEL);
}
else
{
training_parameters_in[param_name]->init(n_training_samples_in, false, SERIAL);
}
}
}
// finally, set the values
{
std::map< std::string, NumericVector<Number>* >::iterator it = training_parameters_in.begin();
std::map< std::string, NumericVector<Number>* >::const_iterator it_end = training_parameters_in.end();
for( ; it != it_end; ++it)
{
std::string param_name = it->first;
NumericVector<Number>* training_vector = it->second;
numeric_index_type first_index = training_vector->first_local_index();
for(numeric_index_type i=0; i<training_vector->local_size(); i++)
{
numeric_index_type index = first_index + i;
Real random_number = ((double)std::rand())/RAND_MAX; // in range [0,1]
// Generate log10 scaled training parameters
if(log_param_scale[param_name])
{
Real log_min = log10(min_parameters.get_value(param_name));
Real log_range = log10(max_parameters.get_value(param_name) / min_parameters.get_value(param_name));
training_vector->set(index, pow(10., log_min + random_number*log_range ) );
}
// Generate linearly scaled training parameters
else
{
training_vector->set(index, random_number*(max_parameters.get_value(param_name) - min_parameters.get_value(param_name))
+ min_parameters.get_value(param_name));
}
}
}
}
}