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test_node_synchronizer.cc
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test_node_synchronizer.cc
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/**
* @file test_node_synchronizer.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Thu May 11 2017
* @date last modification: Wed Jan 15 2020
*
* @brief test the default node synchronizer present in the mesh
*
*
* @section LICENSE
*
* Copyright (©) 2016-2021 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 "test_synchronizers_fixture.hh"
/* -------------------------------------------------------------------------- */
#include "communicator.hh"
#include "data_accessor.hh"
#include "mesh.hh"
#include "node_synchronizer.hh"
/* -------------------------------------------------------------------------- */
#include <chrono>
#include <limits>
#include <random>
#include <thread>
/* -------------------------------------------------------------------------- */
using namespace akantu;
class DataAccessorTest : public DataAccessor<Idx> {
public:
explicit DataAccessorTest(Array<int> & data) : data(data) {}
Int getNbData(const Array<Idx> & nodes, const SynchronizationTag &) const {
return nodes.size() * sizeof(int);
}
void packData(CommunicationBuffer & buffer, const Array<Idx> & nodes,
const SynchronizationTag &) const {
for (auto node : nodes) {
buffer << data(node);
}
}
void unpackData(CommunicationBuffer & buffer, const Array<Idx> & nodes,
const SynchronizationTag &) {
for (auto node : nodes) {
buffer >> data(node);
}
}
protected:
Array<int> & data;
};
class TestNodeSynchronizerFixture : public TestSynchronizerFixture {
public:
static constexpr int max_int = std::numeric_limits<int>::max();
void SetUp() override {
TestSynchronizerFixture::SetUp();
this->distribute();
UInt nb_nodes = this->mesh->getNbNodes();
node_data = std::make_unique<Array<int>>(nb_nodes);
for (auto && data : enumerate(*node_data)) {
auto n = std::get<0>(data);
auto & d = std::get<1>(data);
UInt gn = this->mesh->getNodeGlobalId(n);
if (this->mesh->isMasterNode(n))
d = gn;
else if (this->mesh->isLocalNode(n))
d = -gn;
else if (this->mesh->isSlaveNode(n))
d = max_int;
else
d = -max_int;
}
data_accessor = std::make_unique<DataAccessorTest>(*node_data);
}
void TearDown() override {
data_accessor.reset(nullptr);
node_data.reset(nullptr);
}
void checkData() {
for (auto && data : enumerate(*this->node_data)) {
auto n = std::get<0>(data);
auto & d = std::get<1>(data);
UInt gn = this->mesh->getNodeGlobalId(n);
if (this->mesh->isMasterNode(n))
EXPECT_EQ(d, gn);
else if (this->mesh->isLocalNode(n))
EXPECT_EQ(d, -gn);
else if (this->mesh->isSlaveNode(n))
EXPECT_EQ(d, gn);
else
EXPECT_EQ(d, -max_int);
}
}
protected:
std::unique_ptr<Array<int>> node_data;
std::unique_ptr<DataAccessorTest> data_accessor;
};
/* -------------------------------------------------------------------------- */
constexpr int TestNodeSynchronizerFixture::max_int;
/* -------------------------------------------------------------------------- */
TEST_F(TestNodeSynchronizerFixture, SynchroneOnce) {
auto & synchronizer = this->mesh->getNodeSynchronizer();
synchronizer.synchronizeOnce(*this->data_accessor, SynchronizationTag::_test);
this->checkData();
}
/* -------------------------------------------------------------------------- */
TEST_F(TestNodeSynchronizerFixture, Synchrone) {
auto & node_synchronizer = this->mesh->getNodeSynchronizer();
node_synchronizer.synchronize(*this->data_accessor,
SynchronizationTag::_test);
this->checkData();
}
/* -------------------------------------------------------------------------- */
TEST_F(TestNodeSynchronizerFixture, Asynchrone) {
auto & synchronizer = this->mesh->getNodeSynchronizer();
synchronizer.asynchronousSynchronize(*this->data_accessor,
SynchronizationTag::_test);
std::random_device r;
std::default_random_engine engine(r());
std::uniform_int_distribution<int> uniform_dist(10, 100);
std::chrono::microseconds delay(uniform_dist(engine));
std::this_thread::sleep_for(delay);
synchronizer.waitEndSynchronize(*this->data_accessor,
SynchronizationTag::_test);
this->checkData();
}
/* -------------------------------------------------------------------------- */
TEST_F(TestNodeSynchronizerFixture, Gather) {
auto & synchronizer = this->mesh->getNodeSynchronizer();
const auto & comm = akantu::Communicator::getStaticCommunicator();
Int prank = comm.whoAmI();
if (prank == 0) {
Array<int> all_data(this->mesh->getNbGlobalNodes());
synchronizer.gather(*(this->node_data), all_data);
for (auto && data : enumerate(all_data)) {
EXPECT_EQ(std::get<0>(data), std::abs(std::get<1>(data)));
}
} else {
synchronizer.gather(*(this->node_data));
}
}
/* -------------------------------------------------------------------------- */
TEST_F(TestNodeSynchronizerFixture, Scatter) {
Array<int> local_data(this->mesh->getNbNodes(), 1, this->max_int);
auto & synchronizer = this->mesh->getNodeSynchronizer();
if (prank == 0) {
Array<int> all_data(this->mesh->getNbGlobalNodes());
for (auto && data : enumerate(all_data)) {
std::get<1>(data) = std::get<0>(data);
}
synchronizer.scatter(local_data, all_data);
} else {
synchronizer.scatter(local_data);
}
for (auto && data : enumerate(local_data)) {
auto && n = std::get<0>(data);
auto && d = std::get<1>(data);
UInt gn = this->mesh->getNodeGlobalId(n);
if (this->mesh->isPureGhostNode(n)) {
EXPECT_EQ(d, this->max_int);
} else {
EXPECT_EQ(d, gn);
}
}
}

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