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filtered_synchronizer.cc
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filtered_synchronizer.cc
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/**
* @file filtered_synchronizer.cc
*
* @author David Simon Kammer <david.kammer@epfl.ch>
* @author Mathilde Radiguet <mathilde.radiguet@epfl.ch>
*
* @date creation: Wed Sep 18 2013
* @date last modification: Mon Aug 25 2014
*
* @brief filtered synchronizer
*
* @section LICENSE
*
* Copyright (©) 2014 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 "filtered_synchronizer.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
/* -------------------------------------------------------------------------- */
FilteredSynchronizer::FilteredSynchronizer(Mesh & mesh,
SynchronizerID id,
MemoryID memory_id) :
DistributedSynchronizer(mesh, id, memory_id) {
AKANTU_DEBUG_IN();
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
FilteredSynchronizer * FilteredSynchronizer::
createFilteredSynchronizer(const DistributedSynchronizer & d_synchronizer,
SynchElementFilter & filter) {
AKANTU_DEBUG_IN();
FilteredSynchronizer & f_synchronizer =
*(new FilteredSynchronizer(d_synchronizer.mesh,
d_synchronizer.id + ":filtered",
d_synchronizer.memory_id));
f_synchronizer.setupSynchronizer(d_synchronizer,
filter);
AKANTU_DEBUG_OUT();
return &f_synchronizer;
}
/* -------------------------------------------------------------------------- */
void FilteredSynchronizer::setupSynchronizer(const DistributedSynchronizer & d_synchronizer,
SynchElementFilter & filter) {
AKANTU_DEBUG_IN();
StaticCommunicator & comm = StaticCommunicator::getStaticCommunicator();
Array<Element> * d_send_element = d_synchronizer.send_element;
Array<Element> * d_recv_element = d_synchronizer.recv_element;
std::vector<CommunicationRequest *> isend_requests;
Array<UInt> ** keep_element_recv = new Array<UInt>*[this->nb_proc];
// loop over procs
for (UInt p = 0; p < this->nb_proc; ++p) {
keep_element_recv[p] = NULL;
if (p == this->rank) continue;
// access the element for this proc
const Array<Element> & unfiltered_elements = d_recv_element[p];
Array<Element> & filtered_elements = recv_element[p];
if (unfiltered_elements.getSize() == 0) continue;
keep_element_recv[p] = new Array<UInt>(0,1,"keep_element_recv");
// iterator to loop over all source elements
Array<Element>::const_iterator<Element> it = unfiltered_elements.begin();
Array<Element>::const_iterator<Element> end = unfiltered_elements.end();
// if filter accepts this element, push it into the destination elements
for (UInt el=0; it != end; ++it, ++el) {
const Element & element = *it;
if (filter(element)) {
filtered_elements.push_back(element);
keep_element_recv[p]->push_back(el);
}
}
keep_element_recv[p]->push_back(-1); // just to be sure to send
// something due to some shitty
// MPI implementation who do not
// know what to do with a 0 size
// send
AKANTU_DEBUG_INFO("I have " << keep_element_recv[p]->getSize() - 1
<< " elements to still receive from processor " << p
<< " (communication tag : "
<< Tag::genTag(this->rank, 0, RECEIVE_LIST_TAG) << ")");
isend_requests.push_back(comm.asyncSend<UInt>(keep_element_recv[p]->storage(),
keep_element_recv[p]->getSize(),
p,
Tag::genTag(this->rank, 0, RECEIVE_LIST_TAG)));
}
for (UInt p = 0; p < this->nb_proc; ++p) {
if (p == this->rank) continue;
const Array<Element> & unfiltered_elements = d_send_element[p];
Array<Element> & filtered_elements = send_element[p];
if (unfiltered_elements.getSize() == 0) continue;
AKANTU_DEBUG_INFO("Waiting list of elements to keep from processor " << p
<< " (communication tag : "
<< Tag::genTag(p, 0, RECEIVE_LIST_TAG) << ")");
CommunicationStatus status;
comm.probe<UInt>(p, Tag::genTag(p, 0, RECEIVE_LIST_TAG), status);
Array<UInt> keep_element(status.getSize(),1,"keep_element_snd");
AKANTU_DEBUG_INFO("I have " << keep_element.getSize() - 1
<< " elements to keep in my send list to processor " << p
<< " (communication tag : "
<< Tag::genTag(p, 0, RECEIVE_LIST_TAG) << ")");
comm.receive(keep_element.storage(),
keep_element.getSize(),
p,
Tag::genTag(p, 0, RECEIVE_LIST_TAG));
for(UInt i = 0; i < keep_element.getSize() - 1; ++i) {
filtered_elements.push_back(unfiltered_elements(keep_element(i)));
}
}
comm.waitAll(isend_requests);
comm.freeCommunicationRequest(isend_requests);
for (UInt p=0; p < this->nb_proc; ++p) {
delete keep_element_recv[p];
}
delete [] keep_element_recv;
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
void FilteredSynchronizer::updateElementList(Array<Element> * source_elements,
Array<Element> * destination_elements,
SynchElementFilter & filter) {
AKANTU_DEBUG_IN();
// loop over procs
for (UInt p = 0; p < this->nb_proc; ++p) {
if (p == this->rank) continue;
// access the element for this proc
const Array<Element> & unfiltered_elements = source_elements[p];
Array<Element> & filtered_elements = destination_elements[p];
// iterator to loop over all source elements
Array<Element>::const_iterator<Element> it = unfiltered_elements.begin();
Array<Element>::const_iterator<Element> end = unfiltered_elements.end();
// if filter accepts this element, push it into the destination elements
for (; it != end; ++it) {
const Element & element = *it;
if (filter(element)) {
filtered_elements.push_back(element);
}
}
}
AKANTU_DEBUG_OUT();
}
__END_AKANTU__

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