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synchronizer_impl_tmpl.hh
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/**
* @file synchronizer_impl_tmpl.hh
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Wed Aug 24 13:29:47 2016
*
* @brief Implementation of the SynchronizerImpl
*
* @section LICENSE
*
* Copyright (©) 2010-2011 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 "synchronizer_impl.hh"
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_SYNCHRONIZER_IMPL_TMPL_HH__
#define __AKANTU_SYNCHRONIZER_IMPL_TMPL_HH__
namespace akantu {
/* -------------------------------------------------------------------------- */
template <class Entity>
SynchronizerImpl<Entity>::SynchronizerImpl(const ID & id, MemoryID memory_id,
const StaticCommunicator & comm)
: Synchronizer(id, memory_id, comm), communications(comm) {}
/* -------------------------------------------------------------------------- */
template <class Entity>
void SynchronizerImpl<Entity>::synchronizeOnceImpl(
DataAccessor<Entity> & data_accessor,
const SynchronizationTag & tag) const {
AKANTU_DEBUG_IN();
// no need to synchronize
if (this->nb_proc == 1) {
AKANTU_DEBUG_OUT();
return;
}
typedef std::vector<CommunicationRequest> CommunicationRequests;
typedef std::map<UInt, CommunicationBuffer> CommunicationBuffers;
CommunicationRequests send_requests, recv_requests;
CommunicationBuffers send_buffers, recv_buffers;
auto postComm = [&](const CommunicationSendRecv & sr,
CommunicationBuffers & buffers,
CommunicationRequests & requests) -> void {
auto sit = this->communications.begin_scheme(sr);
auto send = this->communications.end_scheme(sr);
for (; sit != send; ++sit) {
const auto & scheme = sit->second;
auto & proc = sit->first;
auto & buffer = buffers[proc];
UInt buffer_size = data_accessor.getNbData(scheme, tag);
buffer.resize(buffer_size);
if (sr == _recv) {
requests.push_back(communicator.asyncReceive(
buffer, proc,
Tag::genTag(this->rank, 0, Tag::_SYNCHRONIZE, this->hash_id)));
} else {
data_accessor.packData(buffer, scheme, tag);
send_requests.push_back(communicator.asyncSend(
buffer, proc,
Tag::genTag(proc, 0, Tag::_SYNCHRONIZE, this->hash_id)));
}
}
};
// post the receive requests
postComm(_recv, recv_buffers, recv_requests);
// send the data
postComm(_send, send_buffers, send_requests);
// treat the receive requests
UInt request_ready;
while ((request_ready = communicator.waitAny(recv_requests)) != UInt(-1)) {
CommunicationRequest & req = recv_requests[request_ready];
UInt proc = req.getSource();
CommunicationBuffer & buffer = recv_buffers[proc];
const auto & scheme = this->communications.getRecvScheme(proc);
data_accessor.unpackData(buffer, scheme, tag);
recv_requests.erase(recv_requests.begin() + request_ready);
}
communicator.waitAll(send_requests);
communicator.freeCommunicationRequest(send_requests);
communicator.freeCommunicationRequest(recv_requests);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Entity>
void SynchronizerImpl<Entity>::asynchronousSynchronizeImpl(
const DataAccessor<Entity> & data_accessor,
const SynchronizationTag & tag) {
AKANTU_DEBUG_IN();
if (!this->communications.hasCommunication(tag))
this->computeBufferSize(data_accessor, tag);
this->communications.incrementCounter(tag);
// Posting the receive -------------------------------------------------------
if (this->communications.hasPendingRecv(tag)) {
AKANTU_CUSTOM_EXCEPTION_INFO(
debug::CommunicationException(),
"There must still be some pending receive communications."
<< " Tag is " << tag << " Cannot start new ones");
}
auto recv_it = this->communications.begin_recv(tag);
auto recv_end = this->communications.end_recv(tag);
for (; recv_it != recv_end; ++recv_it) {
auto comm_desc = *recv_it;
comm_desc.postRecv(this->hash_id);
}
// Posting the sends -------------------------------------------------------
if (communications.hasPendingSend(tag)) {
AKANTU_CUSTOM_EXCEPTION_INFO(
debug::CommunicationException(),
"There must be some pending sending communications."
<< " Tag is " << tag);
}
auto send_it = communications.begin_send(tag);
auto send_end = communications.end_send(tag);
for (; send_it != send_end; ++send_it) {
auto comm_desc = *send_it;
comm_desc.resetBuffer();
#ifndef AKANTU_NDEBUG
this->packSanityCheckData(comm_desc);
#endif
comm_desc.packData(data_accessor);
comm_desc.postSend(this->hash_id);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Entity>
void SynchronizerImpl<Entity>::waitEndSynchronizeImpl(
DataAccessor<Entity> & data_accessor, const SynchronizationTag & tag) {
AKANTU_DEBUG_IN();
#ifndef AKANTU_NDEBUG
if (this->communications.begin_recv(tag) !=
this->communications.end_recv(tag) &&
!this->communications.hasPendingRecv(tag))
AKANTU_CUSTOM_EXCEPTION_INFO(debug::CommunicationException(),
"No pending communication with the tag \""
<< tag);
#endif
auto recv_end = this->communications.end_recv(tag);
decltype(recv_end) recv_it;
while ((recv_it = this->communications.waitAnyRecv(tag)) != recv_end) {
auto comm_desc = *recv_it;
#ifndef AKANTU_NDEBUG
this->unpackSanityCheckData(comm_desc);
#endif
comm_desc.unpackData(data_accessor);
comm_desc.resetBuffer();
comm_desc.freeRequest();
}
this->communications.waitAllSend(tag);
this->communications.freeSendRequests(tag);
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Entity>
void SynchronizerImpl<Entity>::computeAllBufferSizes(
const DataAccessor<Entity> & data_accessor) {
auto it = this->communications.begin_tag();
auto end = this->communications.end_tag();
for (; it != end; ++it) {
auto tag = *it;
this->computeBufferSize(data_accessor, tag);
}
}
/* -------------------------------------------------------------------------- */
template <class Entity>
void SynchronizerImpl<Entity>::computeBufferSizeImpl(
const DataAccessor<Entity> & data_accessor,
const SynchronizationTag & tag) {
AKANTU_DEBUG_IN();
this->communications.initializeCommunications(tag);
AKANTU_DEBUG_ASSERT(communications.hasCommunication(tag) == true,
"Communications where not properly initialized");
auto recv_it = this->communications.begin_recv_scheme();
auto recv_end = this->communications.end_recv_scheme();
for (; recv_it != recv_end; ++recv_it) {
auto proc = recv_it->first;
auto & scheme = recv_it->second;
UInt srecv = 0;
#ifndef AKANTU_NDEBUG
srecv += this->sanityCheckDataSize(scheme, tag);
#endif
srecv += data_accessor.getNbData(scheme, tag);
AKANTU_DEBUG_INFO("I have " << srecv << "(" << printMemorySize<char>(srecv)
<< " - " << scheme.getSize()
<< " element(s)) data to receive from " << proc
<< " for tag " << tag);
this->communications.setRecvCommunicationSize(tag, proc, srecv);
}
auto send_it = this->communications.begin_send_scheme();
auto send_end = this->communications.end_send_scheme();
for (; send_it != send_end; ++send_it) {
auto proc = send_it->first;
auto & scheme = send_it->second;
UInt ssend = 0;
#ifndef AKANTU_NDEBUG
ssend += this->sanityCheckDataSize(scheme, tag);
#endif
ssend += data_accessor.getNbData(scheme, tag);
AKANTU_DEBUG_INFO("I have " << ssend << "(" << printMemorySize<char>(ssend)
<< " - " << scheme.getSize()
<< " element(s)) data to send to " << proc
<< " for tag " << tag);
this->communications.setSendCommunicationSize(tag, proc, ssend);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
template <class Entity>
UInt SynchronizerImpl<Entity>::sanityCheckDataSize(
const Array<Entity> &, const SynchronizationTag &) const {
return 0;
}
/* -------------------------------------------------------------------------- */
template <class Entity>
void SynchronizerImpl<Entity>::packSanityCheckData(
CommunicationDescriptor<Entity> &) const {}
/* -------------------------------------------------------------------------- */
template <class Entity>
void SynchronizerImpl<Entity>::unpackSanityCheckData(
CommunicationDescriptor<Entity> &) const {}
/* -------------------------------------------------------------------------- */
} // akantu
#endif /* __AKANTU_SYNCHRONIZER_IMPL_TMPL_HH__ */
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