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element_synchronizer.cc
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element_synchronizer.cc
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/**
* Copyright (©) 2016-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* 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 "element_synchronizer.hh"
#include "aka_common.hh"
#include "mesh.hh"
#include "mesh_utils.hh"
/* -------------------------------------------------------------------------- */
#include <algorithm>
#include <iostream>
#include <map>
/* -------------------------------------------------------------------------- */
namespace akantu {
#if defined(AKANTU_MODULE)
#define AKANTU_MODULE_SAVE_ AKANTU_MODULE
#undef AKANTU_MODULE
#endif
#define AKANTU_MODULE element_synchronizer
/* -------------------------------------------------------------------------- */
ElementSynchronizer::ElementSynchronizer(Mesh & mesh, const ID & id,
bool register_to_event_manager,
EventHandlerPriority event_priority)
: SynchronizerImpl<Element>(mesh.getCommunicator(), id), mesh(mesh),
element_to_prank("element_to_prank", id) {
AKANTU_DEBUG_IN();
if (register_to_event_manager) {
this->mesh.registerEventHandler(*this, event_priority);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
ElementSynchronizer::ElementSynchronizer(const ElementSynchronizer & other,
const ID & id,
bool register_to_event_manager,
EventHandlerPriority event_priority)
: SynchronizerImpl<Element>(other, id), mesh(other.mesh),
element_to_prank("element_to_prank", id) {
AKANTU_DEBUG_IN();
element_to_prank.copy(other.element_to_prank);
if (register_to_event_manager) {
this->mesh.registerEventHandler(*this, event_priority);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
ElementSynchronizer::~ElementSynchronizer() = default;
/* -------------------------------------------------------------------------- */
void ElementSynchronizer::substituteElements(
const std::map<Element, Element> & old_to_new_elements) {
auto found_element_end = old_to_new_elements.end();
// substitute old elements with new ones
for (auto && sr : iterate_send_recv) {
for (auto && scheme_pair : communications.iterateSchemes(sr)) {
auto & list = scheme_pair.second;
for (auto & el : list) {
auto found_element_it = old_to_new_elements.find(el);
if (found_element_it != found_element_end) {
el = found_element_it->second;
}
}
}
}
}
/* -------------------------------------------------------------------------- */
void ElementSynchronizer::onElementsChanged(
const Array<Element> & old_elements_list,
const Array<Element> & new_elements_list, const ElementTypeMapArray<Idx> &,
const ChangedElementsEvent &) {
// create a map to link old elements to new ones
std::map<Element, Element> old_to_new_elements;
for (Int el = 0; el < old_elements_list.size(); ++el) {
AKANTU_DEBUG_ASSERT(old_to_new_elements.find(old_elements_list(el)) ==
old_to_new_elements.end(),
"The same element cannot appear twice in the list");
old_to_new_elements[old_elements_list(el)] = new_elements_list(el);
}
substituteElements(old_to_new_elements);
communications.invalidateSizes();
}
/* -------------------------------------------------------------------------- */
void ElementSynchronizer::onElementsRemoved(
const Array<Element> & element_to_remove,
const ElementTypeMapArray<Idx> & new_numbering,
const RemovedElementsEvent &) {
AKANTU_DEBUG_IN();
this->filterScheme([&](auto && element) {
return std::find(element_to_remove.begin(), element_to_remove.end(),
element) == element_to_remove.end();
});
this->renumberElements(new_numbering);
communications.invalidateSizes();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void ElementSynchronizer::buildElementToPrank() {
AKANTU_DEBUG_IN();
Int spatial_dimension = mesh.getSpatialDimension();
element_to_prank.initialize(mesh, _spatial_dimension = spatial_dimension,
_element_kind = _ek_not_defined,
_with_nb_element = true, _default_value = rank);
/// assign prank to all ghost elements
for (auto && scheme : communications.iterateSchemes(_recv)) {
auto & recv = scheme.second;
auto proc = scheme.first;
for (auto & element : recv) {
element_to_prank(element) = proc;
}
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
Int ElementSynchronizer::getRank(const Element & element) const {
if (not element_to_prank.exists(element.type, element.ghost_type)) {
// Nicolas: Ok This is nasty I know....
const_cast<ElementSynchronizer *>(this)->buildElementToPrank();
}
return element_to_prank(element);
}
/* -------------------------------------------------------------------------- */
void ElementSynchronizer::renumberElements(
const ElementTypeMapArray<Idx> & new_numbering) {
for (auto && sr : iterate_send_recv) {
for (auto && scheme_pair : communications.iterateSchemes(sr)) {
auto & list = scheme_pair.second;
for (auto && el : list) {
if (new_numbering.exists(el.type, el.ghost_type)) {
el.element = new_numbering(el);
}
}
}
}
}
/* -------------------------------------------------------------------------- */
Int ElementSynchronizer::sanityCheckDataSize(const Array<Element> & elements,
const SynchronizationTag & tag,
bool from_comm_desc) const {
Int size = SynchronizerImpl<Element>::sanityCheckDataSize(elements, tag,
from_comm_desc);
// global connectivities;
size += mesh.getNbNodesPerElementList(elements) * sizeof(Idx);
// barycenters
size += (elements.size() * mesh.getSpatialDimension() * sizeof(Real));
return size;
}
/* -------------------------------------------------------------------------- */
void ElementSynchronizer::packSanityCheckData(
CommunicationBuffer & buffer, const Array<Element> & elements,
const SynchronizationTag & /*tag*/) const {
for (auto && element : elements) {
Vector<Real> barycenter(mesh.getSpatialDimension());
mesh.getBarycenter(element, barycenter);
buffer << barycenter;
const auto & conns = mesh.getConnectivity(element.type, element.ghost_type);
for (auto n : arange(conns.getNbComponent())) {
buffer << mesh.getNodeGlobalId(conns(element.element, n));
}
}
}
/* -------------------------------------------------------------------------- */
void ElementSynchronizer::unpackSanityCheckData(CommunicationBuffer & buffer,
const Array<Element> & elements,
const SynchronizationTag & tag,
Int proc, Int rank) const {
auto spatial_dimension = mesh.getSpatialDimension();
std::set<SynchronizationTag> skip_conn_tags{
SynchronizationTag::_smmc_facets_conn,
SynchronizationTag::_giu_global_conn};
bool is_skip_tag_conn = skip_conn_tags.find(tag) != skip_conn_tags.end();
for (auto && element : elements) {
Vector<Real> barycenter_loc(spatial_dimension);
mesh.getBarycenter(element, barycenter_loc);
Vector<Real> barycenter(spatial_dimension);
buffer >> barycenter;
auto dist = barycenter_loc.distance(barycenter);
if (not Math::are_float_equal(dist, 0.)) {
AKANTU_EXCEPTION("Unpacking an unknown value for the element "
<< element << "(barycenter " << barycenter_loc
<< " != buffer " << barycenter << ") [" << dist
<< "] - tag: " << tag << " comm from " << proc << " to "
<< rank);
}
const auto & conns = mesh.getConnectivity(element.type, element.ghost_type);
Vector<Idx> global_conn(conns.getNbComponent());
Vector<Idx> local_global_conn(conns.getNbComponent());
auto is_same = true;
for (auto n : arange(global_conn.size())) {
buffer >> global_conn(n);
auto node = conns(element.element, n);
local_global_conn(n) = mesh.getNodeGlobalId(node);
is_same &= is_skip_tag_conn or mesh.isPureGhostNode(node) or
(local_global_conn(n) == global_conn(n));
}
if (not is_same) {
AKANTU_DEBUG_WARNING(
"The connectivity of the element "
<< element << " " << local_global_conn
<< " does not match the connectivity of the equivalent "
"element on proc "
<< proc << " " << global_conn << " in communication with tag "
<< tag);
}
}
}
/* -------------------------------------------------------------------------- */
} // namespace akantu
#if defined(AKANTU_MODULE_SAVE_)
#undef AKANTU_MODULE
#define AKANTU_MODULE AKANTU_MODULE_SAVE_
#undef AKANTU_MODULE_SAVE_
#endif

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