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synchronizer.hh
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/**
* @file synchronizer.hh
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Fri Jun 18 2010
* @date last modification: Thu Dec 10 2015
*
* @brief Common interface for synchronizers
*
* @section LICENSE
*
* Copyright (©) 2010-2012, 2014, 2015 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_SYNCHRONIZER_HH__
#define __AKANTU_SYNCHRONIZER_HH__
/* -------------------------------------------------------------------------- */
#include "aka_memory.hh"
#include "data_accessor.hh"
#include "real_static_communicator.hh"
#include "static_communicator.hh"
/* -------------------------------------------------------------------------- */
#include <map>
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
class Synchronizer : protected Memory {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
Synchronizer(SynchronizerID id = "synchronizer", MemoryID memory_id = 0,
StaticCommunicator & comm = StaticCommunicator::getStaticCommunicator());
virtual ~Synchronizer(){};
virtual void printself(__attribute__((unused)) std::ostream & stream,
__attribute__((unused)) int indent = 0) const {};
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// synchronize ghosts
void synchronize(DataAccessor & data_accessor, SynchronizationTag tag);
/// asynchronous synchronization of ghosts
virtual void asynchronousSynchronize(DataAccessor & data_accessor,
SynchronizationTag tag) = 0;
/// wait end of asynchronous synchronization of ghosts
virtual void waitEndSynchronize(DataAccessor & data_accessor,
SynchronizationTag tag) = 0;
/// compute buffer size for a given tag and data accessor
virtual void computeBufferSize(DataAccessor & data_accessor,
SynchronizationTag tag) = 0;
/**
* tag = |__________20_________|___8____|_4_|
* | proc | num mes| ct|
*/
class Tag {
public:
Tag() : tag(0) {}
Tag(int val) : tag(val) {}
operator int() { return int(tag); } // remove the sign bit
template <typename CommTag>
static inline Tag genTag(int proc, UInt msg_count, CommTag tag) {
int max_tag = StaticCommunicator::getStaticCommunicator().getMaxTag();
int _tag = ((((proc & 0xFFFFF) << 12) + ((msg_count & 0xFF) << 4) +
((Int)tag & 0xF)));
Tag t(max_tag == 0 ? _tag : (_tag % max_tag));
return t;
}
virtual void printself(std::ostream & stream,
__attribute__((unused)) int indent = 0) const {
stream << (tag >> 12) << ":" << (tag >> 4 & 0xFF) << ":" << (tag & 0xF);
}
private:
int tag;
};
/// generate the tag from the ID
template <typename CommTag> inline Tag genTagFromID(CommTag tag) {
int max_tag = StaticCommunicator::getStaticCommunicator().getMaxTag();
int _tag = std::abs((int(hash<std::string>(this->getID())) << 4) + (tag & 0xF));
Tag t(max_tag == 0 ? _tag : (_tag % max_tag));
return t;
}
protected:
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
protected:
class Communication {
public:
void resize(UInt size) {
send_buffer.resize(size);
recv_buffer.resize(size);
size_to_send.resize(size);
size_to_receive.resize(size);
}
public:
/// size of data to send to each processor
std::vector<UInt> size_to_send;
/// size of data to recv to each processor
std::vector<UInt> size_to_receive;
std::vector<CommunicationBuffer> send_buffer;
std::vector<CommunicationBuffer> recv_buffer;
std::vector<CommunicationRequest *> send_requests;
std::vector<CommunicationRequest *> recv_requests;
};
/// id of the synchronizer
SynchronizerID id;
/// message counter per tag
std::map<SynchronizationTag, UInt> tag_counter;
/// the static memory instance
StaticCommunicator * static_communicator;
};
/// standard output stream operator
inline std::ostream & operator<<(std::ostream & stream,
const Synchronizer & _this) {
_this.printself(stream);
return stream;
}
inline std::ostream & operator<<(std::ostream & stream,
const Synchronizer::Tag & _this) {
_this.printself(stream);
return stream;
}
__END_AKANTU__
#endif /* __AKANTU_SYNCHRONIZER_HH__ */

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