+++ /dev/null
-/* Copyright (c) 2014-2019. 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 "src/surf/network_ib.hpp"
-#include "simgrid/sg_config.hpp"
-#include "src/surf/HostImpl.hpp"
-#include "src/surf/xml/platf.hpp"
-#include "surf/surf.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 const& host)
-{
- using simgrid::kernel::resource::IBNode;
- using simgrid::kernel::resource::NetworkIBModel;
-
- static int id=0;
- IBNode* act = new IBNode(id);
-
- id++;
- ((NetworkIBModel*)surf_network_model)->active_nodes.insert({host.get_name(), act});
-}
-
-static void IB_action_state_changed_callback(simgrid::kernel::resource::NetworkAction& action,
- simgrid::kernel::resource::Action::State /*previous*/)
-{
- using simgrid::kernel::resource::IBNode;
- using simgrid::kernel::resource::NetworkIBModel;
-
- if (action.get_state() != simgrid::kernel::resource::Action::State::FINISHED)
- 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::kernel::resource::NetworkAction& action, simgrid::s4u::Host* src,
- simgrid::s4u::Host* dst)
-{
- simgrid::kernel::resource::NetworkIBModel* ibModel = (simgrid::kernel::resource::NetworkIBModel*)surf_network_model;
- simgrid::kernel::resource::IBNode* act_src;
- simgrid::kernel::resource::IBNode* act_dst;
-
- auto asrc = ibModel->active_nodes.find(src->get_name());
- if (asrc != ibModel->active_nodes.end()) {
- act_src = asrc->second;
- } else {
- throw std::out_of_range(std::string("Could not find '") + src->get_cname() + "' active comms !");
- }
-
- auto adst = ibModel->active_nodes.find(dst->get_name());
- if (adst != ibModel->active_nodes.end()) {
- act_dst = adst->second;
- } else {
- throw std::out_of_range(std::string("Could not find '") + dst->get_cname() + "' 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()
-{
- xbt_assert(surf_network_model == nullptr, "Cannot set the network model twice");
-
- surf_network_model = new simgrid::kernel::resource::NetworkIBModel();
- simgrid::s4u::Link::on_communication_state_change.connect(IB_action_state_changed_callback);
- simgrid::s4u::Link::on_communicate.connect(IB_action_init_callback);
- simgrid::s4u::Host::on_creation.connect(IB_create_host_callback);
- simgrid::config::set_default<double>("network/weight-S", 8775);
-}
-
-namespace simgrid {
-namespace kernel {
-namespace resource {
-
-NetworkIBModel::NetworkIBModel() : NetworkSmpiModel()
-{
- /* Do not add this into all_existing_models: our ancestor already does so */
-
- std::string IB_factors_string = config::get_value<std::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 const& 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->get_bound();
- // 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->get_bound(), (*it)->init_rate);
- get_maxmin_system()->update_variable_bound((*it)->action->get_variable(), 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, std::vector<bool>& updatedlist)
-{
- if (not updatedlist[root->id]) {
- XBT_DEBUG("IB - Updating rec %d", root->id);
- computeIBfactors(root);
- updatedlist[root->id] = true;
- for (std::vector<ActiveComm*>::iterator it = root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
- if (not updatedlist[(*it)->destination->id])
- updateIBfactors_rec((*it)->destination, updatedlist);
- }
- for (std::map<IBNode*, int>::iterator it = root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
- if (not updatedlist[it->first->id])
- 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;
-
- 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) {
- delete *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);
- std::vector<bool> updated(active_nodes.size(), false);
- updateIBfactors_rec(from, updated);
- XBT_DEBUG("IB - Finished updating %d", from->id);
-}
-} // namespace resource
-} // namespace kernel
-} // namespace simgrid
