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 "network_ib.hpp"
11 #include "src/surf/HostImpl.hpp"
12 #include "simgrid/sg_config.h"
13 #include "maxmin_private.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();
26 IBNode* act = new IBNode(id);
29 xbt_dict_set(((NetworkIBModel*)surf_network_model)->active_nodes,
30 host.name().c_str(), act, nullptr);
34 static void IB_action_state_changed_callback(
35 simgrid::surf::NetworkAction *action,
36 simgrid::surf::Action::State statein, simgrid::surf::Action::State stateout)
38 using simgrid::surf::NetworkIBModel;
39 using simgrid::surf::IBNode;
41 if(statein!=simgrid::surf::Action::State::running || stateout!=simgrid::surf::Action::State::done)
43 std::pair<IBNode*,IBNode*> pair = ((NetworkIBModel*)surf_network_model)->active_comms[action];
44 XBT_DEBUG("IB callback - action %p finished", action);
46 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, pair.first, pair.second, 1);
48 ((NetworkIBModel*)surf_network_model)->active_comms.erase(action);
52 static void IB_action_init_callback(simgrid::surf::NetworkAction* action, simgrid::s4u::Host* src,
53 simgrid::s4u::Host* dst)
55 simgrid::surf::NetworkIBModel* ibModel = (simgrid::surf::NetworkIBModel*)surf_network_model;
57 simgrid::surf::IBNode* act_src =
58 (simgrid::surf::IBNode*)xbt_dict_get_or_null(ibModel->active_nodes, src->name().c_str());
59 xbt_assert(act_src, "could not find src node active comms !");
61 simgrid::surf::IBNode* act_dst =
62 (simgrid::surf::IBNode*)xbt_dict_get_or_null(ibModel->active_nodes, dst->name().c_str());
63 xbt_assert(act_dst, "could not find dst node active comms !");
65 ibModel->active_comms[action]=std::make_pair(act_src, act_dst);
67 ibModel->updateIBfactors(action, act_src, act_dst, 0);
74 /************************************************************************/
75 /* New model based on MPI contention model for Infiniband platforms */
76 /************************************************************************/
77 /* @Inproceedings{mescal_vienne_phd, */
78 /* author={Jérôme Vienne}, */
79 /* title={prédiction de performances d’applications de calcul haute performance sur réseau Infiniband}, */
80 /* address={Grenoble FRANCE}, */
84 void surf_network_model_init_IB()
86 using simgrid::surf::networkActionStateChangedCallbacks;
88 if (surf_network_model)
91 surf_network_model = new simgrid::surf::NetworkIBModel();
92 all_existing_models->push_back(surf_network_model);
93 networkActionStateChangedCallbacks.connect(IB_action_state_changed_callback);
94 Link::onCommunicate.connect(IB_action_init_callback);
95 simgrid::s4u::Host::onCreation.connect(IB_create_host_callback);
96 xbt_cfg_setdefault_double("network/weight-S", 8775);
100 #include "src/surf/xml/platf.hpp" // FIXME: move that back to the parsing area
105 NetworkIBModel::NetworkIBModel()
106 : NetworkSmpiModel() {
108 active_nodes=nullptr;
110 const char* IB_factors_string=xbt_cfg_get_string("smpi/IB-penalty-factors");
111 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
113 surf_parse_assert(xbt_dynar_length(radical_elements)==3,
114 "smpi/IB-penalty-factors should be provided and contain 3 elements, semi-colon separated. Example: 0.965;0.925;1.35");
116 Be = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 0, char *), "First part of smpi/IB-penalty-factors is not numerical: %s");
117 Bs = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 1, char *), "Second part of smpi/IB-penalty-factors is not numerical: %s");
118 ys = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 2, char *), "Third part of smpi/IB-penalty-factors is not numerical: %s");
120 xbt_dynar_free(&radical_elements);
123 NetworkIBModel::~NetworkIBModel()
125 xbt_dict_cursor_t cursor = nullptr;
126 IBNode* instance = nullptr;
127 char *name = nullptr;
128 xbt_dict_foreach(active_nodes, cursor, name, instance)
130 xbt_dict_free(&active_nodes);
133 void NetworkIBModel::computeIBfactors(IBNode *root) {
134 double penalized_bw=0.0;
135 double num_comm_out = (double) root->ActiveCommsUp.size();
136 double max_penalty_out=0.0;
137 //first, compute all outbound penalties to get their max
138 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
139 double my_penalty_out = 1.0;
142 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
143 my_penalty_out = num_comm_out * Bs * ys;
145 my_penalty_out = num_comm_out * Bs;
148 max_penalty_out = std::max(max_penalty_out,my_penalty_out);
151 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
153 //compute inbound penalty
154 double my_penalty_in = 1.0;
155 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
157 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
159 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
161 double penalty = std::max(my_penalty_in,max_penalty_out);
163 double rate_before_update = (*it)->action->getBound();
164 //save initial rate of the action
165 if((*it)->init_rate==-1)
166 (*it)->init_rate= rate_before_update;
168 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
170 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
171 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 );
172 lmm_update_variable_bound(maxminSystem_, (*it)->action->getVariable(), penalized_bw);
174 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 );
178 XBT_DEBUG("Finished computing IB penalties");
181 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
182 if(updatedlist[root->id]==0){
183 XBT_DEBUG("IB - Updating rec %d", root->id);
184 computeIBfactors(root);
185 updatedlist[root->id]=1;
186 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
187 if(updatedlist[(*it)->destination->id]!=1)
188 updateIBfactors_rec((*it)->destination, updatedlist);
190 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
191 if(updatedlist[it->first->id]!=1)
192 updateIBfactors_rec(it->first, updatedlist);
198 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
199 if (from == to)//disregard local comms (should use loopback)
202 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
203 ActiveComm* comm=nullptr;
205 if(to->ActiveCommsDown[from]==1)
206 to->ActiveCommsDown.erase(from);
208 to->ActiveCommsDown[from]-=1;
210 to->nbActiveCommsDown--;
211 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
212 it != from->ActiveCommsUp.end(); ++it) {
213 if((*it)->action==action){
215 from->ActiveCommsUp.erase(it);
223 ActiveComm* comm=new ActiveComm();
225 comm->destination=to;
226 from->ActiveCommsUp.push_back(comm);
228 to->ActiveCommsDown[from]+=1;
229 to->nbActiveCommsDown++;
231 XBT_DEBUG("IB - Updating %d", from->id);
232 updateIBfactors_rec(from, updated);
233 XBT_DEBUG("IB - Finished updating %d", from->id);