-/* Copyright (c) 2014. The SimGrid Team.
- * All rights reserved. */
+/* 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
+
+ IBNode* act = new IBNode(id);
+
+ id++;
+ ((NetworkIBModel*)surf_network_model)->active_nodes.insert({host.getName(), act});
+}
+
+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* act_dst;
+
+ try {
+ act_src = ibModel->active_nodes.at(src->getName());
+ } catch (std::out_of_range& unfound) {
+ throw std::out_of_range(std::string("Could not find '") + src->getCname() + "' active comms !");
+ }
+
+ try {
+ act_dst = ibModel->active_nodes.at(dst->getName());
+ } catch (std::out_of_range& unfound) {
+ throw std::out_of_range(std::string("Could not find '") + dst->getCname() + "' 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;
+ 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");
+
+ try {
+ Be = std::stod(radical_elements.front());
+ } catch (std::invalid_argument& ia) {
+ throw std::invalid_argument(std::string("First part of smpi/IB-penalty-factors is not numerical:") + ia.what());
+ }
+
+ try {
+ Bs = std::stod(radical_elements.at(1));
+ } catch (std::invalid_argument& ia) {
+ throw std::invalid_argument(std::string("Second part of smpi/IB-penalty-factors is not numerical:") + ia.what());
+ }
+
+ try {
+ ys = std::stod(radical_elements.back());
+ } catch (std::invalid_argument& ia) {
+ throw std::invalid_argument(std::string("Third part of smpi/IB-penalty-factors is not numerical:") + ia.what());
+ }
+}
+
+NetworkIBModel::~NetworkIBModel()
+{
+ for (auto instance : active_nodes)
+ delete instance.second;
+}
+
+void NetworkIBModel::computeIBfactors(IBNode* root)
+{
+ double num_comm_out = static_cast<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;
+
+ double 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(active_nodes.size() * 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);
+}
+}
+}
