1 /* Copyright (c) 2014-2015. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
9 #include "simgrid/sg_config.h"
10 #include "src/surf/HostImpl.hpp"
11 #include "src/surf/maxmin_private.hpp"
12 #include "src/surf/network_ib.hpp"
13 #include "src/surf/xml/platf.hpp"
15 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
17 static void IB_create_host_callback(simgrid::s4u::Host& host){
18 using simgrid::surf::NetworkIBModel;
19 using simgrid::surf::IBNode;
22 // pour t->id -> rajouter une nouvelle struct dans le dict, pour stocker les comms actives
23 if(((NetworkIBModel*)surf_network_model)->active_nodes==nullptr)
24 ((NetworkIBModel*)surf_network_model)->active_nodes = xbt_dict_new_homogeneous(nullptr);
26 IBNode* act = new IBNode(id);
29 xbt_dict_set(((NetworkIBModel*)surf_network_model)->active_nodes, host.cname(), act, nullptr);
32 static void IB_action_state_changed_callback(simgrid::surf::NetworkAction* action)
34 using simgrid::surf::NetworkIBModel;
35 using simgrid::surf::IBNode;
37 if (action->getState() != simgrid::surf::Action::State::done)
39 std::pair<IBNode*,IBNode*> pair = ((NetworkIBModel*)surf_network_model)->active_comms[action];
40 XBT_DEBUG("IB callback - action %p finished", action);
42 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, pair.first, pair.second, 1);
44 ((NetworkIBModel*)surf_network_model)->active_comms.erase(action);
48 static void IB_action_init_callback(simgrid::surf::NetworkAction* action, simgrid::s4u::Host* src,
49 simgrid::s4u::Host* dst)
51 simgrid::surf::NetworkIBModel* ibModel = (simgrid::surf::NetworkIBModel*)surf_network_model;
53 simgrid::surf::IBNode* act_src = (simgrid::surf::IBNode*)xbt_dict_get_or_null(ibModel->active_nodes, src->cname());
54 xbt_assert(act_src, "could not find src node active comms !");
56 simgrid::surf::IBNode* act_dst = (simgrid::surf::IBNode*)xbt_dict_get_or_null(ibModel->active_nodes, dst->cname());
57 xbt_assert(act_dst, "could not find dst node active comms !");
59 ibModel->active_comms[action]=std::make_pair(act_src, act_dst);
61 ibModel->updateIBfactors(action, act_src, act_dst, 0);
68 /************************************************************************/
69 /* New model based on MPI contention model for Infiniband platforms */
70 /************************************************************************/
71 /* @Inproceedings{mescal_vienne_phd, */
72 /* author={Jérôme Vienne}, */
73 /* title={prédiction de performances d’applications de calcul haute performance sur réseau Infiniband}, */
74 /* address={Grenoble FRANCE}, */
78 void surf_network_model_init_IB()
80 if (surf_network_model)
83 surf_network_model = new simgrid::surf::NetworkIBModel();
84 all_existing_models->push_back(surf_network_model);
85 simgrid::s4u::Link::onCommunicationStateChange.connect(IB_action_state_changed_callback);
86 simgrid::s4u::Link::onCommunicate.connect(IB_action_init_callback);
87 simgrid::s4u::Host::onCreation.connect(IB_create_host_callback);
88 xbt_cfg_setdefault_double("network/weight-S", 8775);
95 NetworkIBModel::NetworkIBModel()
96 : NetworkSmpiModel() {
100 const char* IB_factors_string=xbt_cfg_get_string("smpi/IB-penalty-factors");
101 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
103 surf_parse_assert(xbt_dynar_length(radical_elements)==3,
104 "smpi/IB-penalty-factors should be provided and contain 3 elements, semi-colon separated. Example: 0.965;0.925;1.35");
106 Be = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 0, char *), "First part of smpi/IB-penalty-factors is not numerical: %s");
107 Bs = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 1, char *), "Second part of smpi/IB-penalty-factors is not numerical: %s");
108 ys = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 2, char *), "Third part of smpi/IB-penalty-factors is not numerical: %s");
110 xbt_dynar_free(&radical_elements);
113 NetworkIBModel::~NetworkIBModel()
115 xbt_dict_cursor_t cursor = nullptr;
116 IBNode* instance = nullptr;
117 char *name = nullptr;
118 xbt_dict_foreach(active_nodes, cursor, name, instance)
120 xbt_dict_free(&active_nodes);
123 void NetworkIBModel::computeIBfactors(IBNode *root) {
124 double penalized_bw=0.0;
125 double num_comm_out = (double) root->ActiveCommsUp.size();
126 double max_penalty_out=0.0;
127 //first, compute all outbound penalties to get their max
128 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
129 double my_penalty_out = 1.0;
132 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
133 my_penalty_out = num_comm_out * Bs * ys;
135 my_penalty_out = num_comm_out * Bs;
138 max_penalty_out = std::max(max_penalty_out,my_penalty_out);
141 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
143 //compute inbound penalty
144 double my_penalty_in = 1.0;
145 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
147 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
149 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
151 double penalty = std::max(my_penalty_in,max_penalty_out);
153 double rate_before_update = (*it)->action->getBound();
154 //save initial rate of the action
155 if((*it)->init_rate==-1)
156 (*it)->init_rate= rate_before_update;
158 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
160 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
161 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 );
162 lmm_update_variable_bound(maxminSystem_, (*it)->action->getVariable(), penalized_bw);
164 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 );
168 XBT_DEBUG("Finished computing IB penalties");
171 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
172 if(updatedlist[root->id]==0){
173 XBT_DEBUG("IB - Updating rec %d", root->id);
174 computeIBfactors(root);
175 updatedlist[root->id]=1;
176 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
177 if(updatedlist[(*it)->destination->id]!=1)
178 updateIBfactors_rec((*it)->destination, updatedlist);
180 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
181 if(updatedlist[it->first->id]!=1)
182 updateIBfactors_rec(it->first, updatedlist);
188 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
189 if (from == to)//disregard local comms (should use loopback)
192 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
193 ActiveComm* comm=nullptr;
195 if(to->ActiveCommsDown[from]==1)
196 to->ActiveCommsDown.erase(from);
198 to->ActiveCommsDown[from]-=1;
200 to->nbActiveCommsDown--;
201 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
202 it != from->ActiveCommsUp.end(); ++it) {
203 if((*it)->action==action){
205 from->ActiveCommsUp.erase(it);
213 ActiveComm* comm=new ActiveComm();
215 comm->destination=to;
216 from->ActiveCommsUp.push_back(comm);
218 to->ActiveCommsDown[from]+=1;
219 to->nbActiveCommsDown++;
221 XBT_DEBUG("IB - Updating %d", from->id);
222 updateIBfactors_rec(from, updated);
223 XBT_DEBUG("IB - Finished updating %d", from->id);