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node_synchronizer.cc
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node_synchronizer.cc
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/**
* Copyright (©) 2010-2023 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 "node_synchronizer.hh"
#include "mesh.hh"
/* -------------------------------------------------------------------------- */
namespace akantu {
/* -------------------------------------------------------------------------- */
NodeSynchronizer::NodeSynchronizer(Mesh & mesh, const ID & id,
const bool register_to_event_manager,
EventHandlerPriority event_priority)
: SynchronizerImpl<Idx>(mesh.getCommunicator(), id), mesh(mesh) {
AKANTU_DEBUG_IN();
if (register_to_event_manager) {
this->mesh.registerEventHandler(*this, event_priority);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
NodeSynchronizer::~NodeSynchronizer() = default;
/* -------------------------------------------------------------------------- */
Int NodeSynchronizer::getRank(const Idx & node) const {
return this->mesh.getNodePrank(node);
}
/* -------------------------------------------------------------------------- */
void NodeSynchronizer::onNodesAdded(const Array<Idx> & /*nodes_list*/,
const NewNodesEvent &) {
std::map<Int, std::vector<Idx>> nodes_per_proc;
// recreates fully the schemes due to changes of global ids
// \TODO add an event to handle global id changes
for (auto && data : communications.iterateSchemes(_recv)) {
auto & scheme = data.second;
scheme.resize(0);
}
for (auto && local_id : arange(mesh.getNbNodes())) {
if (not mesh.isSlaveNode(local_id)) {
continue; // local, master or pure ghost
}
auto global_id = mesh.getNodeGlobalId(local_id);
auto proc = mesh.getNodePrank(local_id);
AKANTU_DEBUG_ASSERT(
proc != -1,
"The node " << local_id << " does not have a valid associated prank");
nodes_per_proc[proc].push_back(global_id);
auto & scheme = communications.createScheme(proc, _recv);
scheme.push_back(local_id);
}
std::vector<CommunicationRequest> send_requests;
for (auto && pair : communications.iterateSchemes(_recv)) {
auto proc = pair.first;
AKANTU_DEBUG_ASSERT(proc != -1,
"For real I should send something to proc -1");
// if proc not in nodes_per_proc this should insert an empty array to send
send_requests.push_back(communicator.asyncSend(
nodes_per_proc[proc], proc, Tag::genTag(rank, proc, 0xcafe)));
}
for (auto && data : communications.iterateSchemes(_send)) {
auto proc = data.first;
auto & scheme = data.second;
CommunicationStatus status;
auto tag = Tag::genTag(proc, rank, 0xcafe);
communicator.probe<Int>(proc, tag, status);
scheme.resize(status.size());
communicator.receive(scheme, proc, tag);
std::transform(scheme.begin(), scheme.end(), scheme.begin(),
[&](auto & gnode) { return mesh.getNodeLocalId(gnode); });
}
// communicator.receiveAnyNumber<UInt>(
// send_requests,
// [&](auto && proc, auto && nodes) {
// auto & scheme = communications.createScheme(proc, _send);
// scheme.resize(nodes.size());
// for (auto && data : enumerate(nodes)) {
// auto global_id = std::get<1>(data);
// auto local_id = mesh.getNodeLocalId(global_id);
// AKANTU_DEBUG_ASSERT(local_id != UInt(-1),
// "The global node " << global_id
// << "is not known on rank "
// << rank);
// scheme[std::get<0>(data)] = local_id;
// }
// },
// Tag::genTag(rank, count, 0xcafe));
// ++count;
Communicator::waitAll(send_requests);
Communicator::freeCommunicationRequest(send_requests);
this->entities_changed = true;
}
/* -------------------------------------------------------------------------- */
Int NodeSynchronizer::sanityCheckDataSize(const Array<Idx> & nodes,
const SynchronizationTag & tag,
bool from_comm_desc) const {
auto size =
SynchronizerImpl<Idx>::sanityCheckDataSize(nodes, tag, from_comm_desc);
// global id
if (tag != SynchronizationTag::_giu_global_conn) {
size += sizeof(Idx) * nodes.size();
}
// flag
size += sizeof(NodeFlag) * nodes.size();
// positions
size += mesh.getSpatialDimension() * sizeof(Real) * nodes.size();
return size;
}
/* -------------------------------------------------------------------------- */
void NodeSynchronizer::packSanityCheckData(
CommunicationBuffer & buffer, const Array<Idx> & nodes,
const SynchronizationTag & tag) const {
auto dim = mesh.getSpatialDimension();
for (auto && node : nodes) {
if (tag != SynchronizationTag::_giu_global_conn) {
buffer << mesh.getNodeGlobalId(node);
}
buffer << mesh.getNodeFlag(node);
buffer << Vector<Real>(mesh.getNodes().begin(dim)[node]);
}
}
/* -------------------------------------------------------------------------- */
void NodeSynchronizer::unpackSanityCheckData(CommunicationBuffer & buffer,
const Array<Idx> & nodes,
const SynchronizationTag & tag,
Int proc, Int rank) const {
auto dim = mesh.getSpatialDimension();
#ifndef AKANTU_NDEBUG
auto periodic = [&](auto && flag) { return flag & NodeFlag::_periodic_mask; };
auto distrib = [&](auto && flag) { return flag & NodeFlag::_shared_mask; };
#endif
for (auto && node : nodes) {
if (tag != SynchronizationTag::_giu_global_conn) {
Int global_id;
buffer >> global_id;
AKANTU_DEBUG_ASSERT(global_id == mesh.getNodeGlobalId(node),
"The nodes global ids do not match: "
<< global_id
<< " != " << mesh.getNodeGlobalId(node));
}
NodeFlag flag;
buffer >> flag;
AKANTU_DEBUG_ASSERT(
(periodic(flag) == periodic(mesh.getNodeFlag(node))) and
(((distrib(flag) == NodeFlag::_master) and
(distrib(mesh.getNodeFlag(node)) ==
NodeFlag::_slave)) or // master to slave
((distrib(flag) == NodeFlag::_slave) and
(distrib(mesh.getNodeFlag(node)) ==
NodeFlag::_master)) or // reverse comm slave to master
(distrib(mesh.getNodeFlag(node)) ==
NodeFlag::_pure_ghost or // pure ghost nodes
distrib(flag) == NodeFlag::_pure_ghost)),
"The node flags: " << flag << " and " << mesh.getNodeFlag(node));
Vector<Real> pos_remote(dim);
buffer >> pos_remote;
Vector<Real> pos(mesh.getNodes().begin(dim)[node]);
auto dist = pos_remote.distance(pos);
if (not Math::are_float_equal(dist, 0.)) {
AKANTU_EXCEPTION("Unpacking an unknown value for the node "
<< node << "(position " << pos << " != buffer "
<< pos_remote << ") [" << dist << "] - tag: " << tag
<< " comm from " << proc << " to " << rank);
}
}
}
/* -------------------------------------------------------------------------- */
void NodeSynchronizer::fillEntityToSend(Array<Idx> & nodes_to_send) {
auto nb_nodes = mesh.getNbNodes();
this->entities_from_root.clear();
nodes_to_send.resize(0);
for (Int n : arange(nb_nodes)) {
if (not mesh.isLocalOrMasterNode(n)) {
continue;
}
entities_from_root.push_back(n);
}
for (auto n : entities_from_root) {
auto global_node = mesh.getNodeGlobalId(n);
nodes_to_send.push_back(global_node);
}
}
/* -------------------------------------------------------------------------- */
} // namespace akantu

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