-/* Copyright (c) 2014. The SimGrid Team.
+/* Copyright (c) 2014-2015. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include <utility>
+
+#include "simgrid/sg_config.h"
+#include "src/surf/HostImpl.hpp"
+#include "src/surf/maxmin_private.hpp"
+#include "src/surf/network_ib.hpp"
+#include "src/surf/xml/platf.hpp"
+#include <boost/algorithm/string/classification.hpp>
+#include <boost/algorithm/string/split.hpp>
+
+XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
+
+static void IB_create_host_callback(simgrid::s4u::Host& host){
+ using simgrid::surf::NetworkIBModel;
+ using simgrid::surf::IBNode;
+
+ static int id=0;
+ // pour t->id -> rajouter une nouvelle struct dans le dict, pour stocker les comms actives
+ if(((NetworkIBModel*)surf_network_model)->active_nodes==nullptr)
+ ((NetworkIBModel*)surf_network_model)->active_nodes = xbt_dict_new_homogeneous(nullptr);
+
+ IBNode* act = new IBNode(id);
+
+ id++;
+ xbt_dict_set(((NetworkIBModel*)surf_network_model)->active_nodes, host.cname(), act, nullptr);
+}
+
+static void IB_action_state_changed_callback(simgrid::surf::NetworkAction* action)
+{
+ using simgrid::surf::NetworkIBModel;
+ using simgrid::surf::IBNode;
+
+ if (action->getState() != simgrid::surf::Action::State::done)
+ return;
+ std::pair<IBNode*,IBNode*> pair = ((NetworkIBModel*)surf_network_model)->active_comms[action];
+ XBT_DEBUG("IB callback - action %p finished", action);
+
+ ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, pair.first, pair.second, 1);
+
+ ((NetworkIBModel*)surf_network_model)->active_comms.erase(action);
+
+}
+
+static void IB_action_init_callback(simgrid::surf::NetworkAction* action, simgrid::s4u::Host* src,
+ simgrid::s4u::Host* dst)
+{
+ simgrid::surf::NetworkIBModel* ibModel = (simgrid::surf::NetworkIBModel*)surf_network_model;
+
+ simgrid::surf::IBNode* act_src = (simgrid::surf::IBNode*)xbt_dict_get_or_null(ibModel->active_nodes, src->cname());
+ xbt_assert(act_src, "could not find src node active comms !");
+
+ simgrid::surf::IBNode* act_dst = (simgrid::surf::IBNode*)xbt_dict_get_or_null(ibModel->active_nodes, dst->cname());
+ xbt_assert(act_dst, "could not find dst node active comms !");
+
+ ibModel->active_comms[action]=std::make_pair(act_src, act_dst);
+
+ ibModel->updateIBfactors(action, act_src, act_dst, 0);
+}
+
+/*********
+ * Model *
+ *********/
+
+/************************************************************************/
+/* New model based on MPI contention model for Infiniband platforms */
+/************************************************************************/
+/* @Inproceedings{mescal_vienne_phd, */
+/* author={Jérôme Vienne}, */
+/* title={prédiction de performances d’applications de calcul haute performance sur réseau Infiniband}, */
+/* address={Grenoble FRANCE}, */
+/* month=june, */
+/* year={2010} */
+/* } */
+void surf_network_model_init_IB()
+{
+ if (surf_network_model)
+ return;
+
+ surf_network_model = new simgrid::surf::NetworkIBModel();
+ all_existing_models->push_back(surf_network_model);
+ simgrid::s4u::Link::onCommunicationStateChange.connect(IB_action_state_changed_callback);
+ simgrid::s4u::Link::onCommunicate.connect(IB_action_init_callback);
+ simgrid::s4u::Host::onCreation.connect(IB_create_host_callback);
+ xbt_cfg_setdefault_double("network/weight-S", 8775);
+
+}
+
+namespace simgrid {
+ namespace surf {
+
+ NetworkIBModel::NetworkIBModel()
+ : NetworkSmpiModel() {
+ haveGap_=false;
+ active_nodes=nullptr;
+
+ const char* IB_factors_string=xbt_cfg_get_string("smpi/IB-penalty-factors");
+ std::vector<std::string> radical_elements;
+ boost::split(radical_elements, IB_factors_string, boost::is_any_of(";"));
+
+ surf_parse_assert(radical_elements.size() == 3, "smpi/IB-penalty-factors should be provided and contain 3 "
+ "elements, semi-colon separated. Example: 0.965;0.925;1.35");
+
+ Be = xbt_str_parse_double(radical_elements.front().c_str(),
+ "First part of smpi/IB-penalty-factors is not numerical: %s");
+ Bs = xbt_str_parse_double((radical_elements.at(1)).c_str(),
+ "Second part of smpi/IB-penalty-factors is not numerical: %s");
+ ys = xbt_str_parse_double(radical_elements.back().c_str(),
+ "Third part of smpi/IB-penalty-factors is not numerical: %s");
+ }
+
+ NetworkIBModel::~NetworkIBModel()
+ {
+ xbt_dict_cursor_t cursor = nullptr;
+ IBNode* instance = nullptr;
+ char *name = nullptr;
+ xbt_dict_foreach(active_nodes, cursor, name, instance)
+ delete instance;
+ xbt_dict_free(&active_nodes);
+ }
+
+ void NetworkIBModel::computeIBfactors(IBNode *root) {
+ double penalized_bw=0.0;
+ double num_comm_out = (double) root->ActiveCommsUp.size();
+ double max_penalty_out=0.0;
+ //first, compute all outbound penalties to get their max
+ for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
+ double my_penalty_out = 1.0;
+
+ if(num_comm_out!=1){
+ if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
+ my_penalty_out = num_comm_out * Bs * ys;
+ else
+ my_penalty_out = num_comm_out * Bs;
+ }
+
+ max_penalty_out = std::max(max_penalty_out,my_penalty_out);
+ }
+
+ for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
+
+ //compute inbound penalty
+ double my_penalty_in = 1.0;
+ int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
+ if(nb_comms!=1)
+ my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
+ * Be
+ * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
+
+ double penalty = std::max(my_penalty_in,max_penalty_out);
+
+ double rate_before_update = (*it)->action->getBound();
+ //save initial rate of the action
+ if((*it)->init_rate==-1)
+ (*it)->init_rate= rate_before_update;
+
+ penalized_bw = num_comm_out ? (*it)->init_rate / penalty : (*it)->init_rate;
+
+ if (not double_equals(penalized_bw, rate_before_update, sg_surf_precision)) {
+ XBT_DEBUG("%d->%d action %p penalty updated : bw now %f, before %f , initial rate %f", root->id,(*it)->destination->id,(*it)->action,penalized_bw, (*it)->action->getBound(), (*it)->init_rate );
+ lmm_update_variable_bound(maxminSystem_, (*it)->action->getVariable(), penalized_bw);
+ }else{
+ XBT_DEBUG("%d->%d action %p penalty not updated : bw %f, initial rate %f", root->id,(*it)->destination->id,(*it)->action,penalized_bw, (*it)->init_rate );
+ }
+
+ }
+ XBT_DEBUG("Finished computing IB penalties");
+ }
+
+ void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
+ if(updatedlist[root->id]==0){
+ XBT_DEBUG("IB - Updating rec %d", root->id);
+ computeIBfactors(root);
+ updatedlist[root->id]=1;
+ for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
+ if(updatedlist[(*it)->destination->id]!=1)
+ updateIBfactors_rec((*it)->destination, updatedlist);
+ }
+ for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
+ if(updatedlist[it->first->id]!=1)
+ updateIBfactors_rec(it->first, updatedlist);
+ }
+ }
+ }
+
+
+ void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
+ if (from == to)//disregard local comms (should use loopback)
+ return;
+
+ bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
+ ActiveComm* comm=nullptr;
+ if(remove){
+ if(to->ActiveCommsDown[from]==1)
+ to->ActiveCommsDown.erase(from);
+ else
+ to->ActiveCommsDown[from]-=1;
+
+ to->nbActiveCommsDown--;
+ for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
+ it != from->ActiveCommsUp.end(); ++it) {
+ if((*it)->action==action){
+ comm=(*it);
+ from->ActiveCommsUp.erase(it);
+ break;
+ }
+ }
+ action->unref();
+
+ }else{
+ action->ref();
+ ActiveComm* comm=new ActiveComm();
+ comm->action=action;
+ comm->destination=to;
+ from->ActiveCommsUp.push_back(comm);
+
+ to->ActiveCommsDown[from]+=1;
+ to->nbActiveCommsDown++;
+ }
+ XBT_DEBUG("IB - Updating %d", from->id);
+ updateIBfactors_rec(from, updated);
+ XBT_DEBUG("IB - Finished updating %d", from->id);
+ if(comm)
+ delete comm;
+ xbt_free(updated);
+ }
+
+ }
+}
