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. */
10 #include "network_ib.hpp"
11 #include "simgrid/sg_config.h"
12 #include "maxmin_private.hpp"
13 #include "src/surf/host_interface.hpp"
15 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
17 static void IB_create_host_callback(simgrid::s4u::Host& host){
18 using namespace simgrid::surf;
21 // pour t->id -> rajouter une nouvelle struct dans le dict, pour stocker les comms actives
22 if(((NetworkIBModel*)surf_network_model)->active_nodes==NULL)
23 ((NetworkIBModel*)surf_network_model)->active_nodes=xbt_dict_new();
25 IBNode* act = new IBNode(id);
28 xbt_dict_set(((NetworkIBModel*)surf_network_model)->active_nodes,
29 host.name().c_str(), act, NULL);
33 static void IB_action_state_changed_callback(
34 simgrid::surf::NetworkAction *action,
35 e_surf_action_state_t statein, e_surf_action_state_t stateout)
37 using namespace simgrid::surf;
38 if(statein!=SURF_ACTION_RUNNING|| stateout!=SURF_ACTION_DONE)
40 std::pair<IBNode*,IBNode*> pair = ((NetworkIBModel*)surf_network_model)->active_comms[action];
41 XBT_DEBUG("IB callback - action %p finished", action);
43 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, pair.first, pair.second, 1);
45 ((NetworkIBModel*)surf_network_model)->active_comms.erase(action);
50 static void IB_action_init_callback(
51 simgrid::surf::NetworkAction *action, simgrid::surf::NetCard *src, simgrid::surf::NetCard *dst,
52 double size, double rate)
54 using namespace simgrid::surf;
55 if(((NetworkIBModel*)surf_network_model)->active_nodes==NULL)
56 xbt_die("IB comm added, without any node connected !");
58 IBNode* act_src= (IBNode*) xbt_dict_get_or_null(((NetworkIBModel*)surf_network_model)->active_nodes, src->getName());
60 xbt_die("could not find src node active comms !");
63 IBNode* act_dst= (IBNode*) xbt_dict_get_or_null(((NetworkIBModel*)surf_network_model)->active_nodes, dst->getName());
65 xbt_die("could not find dst node active comms !");
66 // act_dst->rate=rate;
68 ((NetworkIBModel*)surf_network_model)->active_comms[action]=std::make_pair(act_src, act_dst);
69 //post the action in the second dist, to retrieve in the other callback
70 XBT_DEBUG("IB callback - action %p init", action);
72 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, act_src, act_dst, 0);
80 /************************************************************************/
81 /* New model based on MPI contention model for Infiniband platforms */
82 /************************************************************************/
83 /* @Inproceedings{mescal_vienne_phd, */
84 /* author={Jérôme Vienne}, */
85 /* title={prédiction de performances d’applications de calcul haute performance sur réseau Infiniband}, */
86 /* address={Grenoble FRANCE}, */
90 void surf_network_model_init_IB(void)
92 using simgrid::surf::networkActionStateChangedCallbacks;
93 using simgrid::surf::networkCommunicateCallbacks;
95 if (surf_network_model)
97 surf_network_model = new simgrid::surf::NetworkIBModel();
98 net_define_callbacks();
99 xbt_dynar_push(all_existing_models, &surf_network_model);
100 networkActionStateChangedCallbacks.connect(IB_action_state_changed_callback);
101 networkCommunicateCallbacks.connect(IB_action_init_callback);
102 simgrid::s4u::Host::onCreation.connect(IB_create_host_callback);
103 xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
110 NetworkIBModel::NetworkIBModel()
111 : NetworkSmpiModel() {
115 const char* IB_factors_string=sg_cfg_get_string("smpi/IB_penalty_factors");
116 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
118 if(xbt_dynar_length(radical_elements)!=3)
119 surf_parse_error("smpi/IB_penalty_factors should be provided and contain 3 elements, semi-colon separated : for example 0.965;0.925;1.35");
121 Be = atof(xbt_dynar_get_as(radical_elements, 0, char *));
122 Bs = atof(xbt_dynar_get_as(radical_elements, 1, char *));
123 ys = atof(xbt_dynar_get_as(radical_elements, 2, char *));
125 xbt_dynar_free(&radical_elements);
128 NetworkIBModel::~NetworkIBModel()
130 xbt_dict_cursor_t cursor = NULL;
131 IBNode* instance = NULL;
133 xbt_dict_foreach(active_nodes, cursor, name, instance)
135 xbt_dict_free(&active_nodes);
138 void NetworkIBModel::computeIBfactors(IBNode *root) {
139 double penalized_bw=0.0;
140 double num_comm_out = (double) root->ActiveCommsUp.size();
141 double max_penalty_out=0.0;
142 //first, compute all outbound penalties to get their max
143 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
144 double my_penalty_out = 1.0;
147 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
148 my_penalty_out = num_comm_out * Bs * ys;
150 my_penalty_out = num_comm_out * Bs;
153 max_penalty_out = std::max(max_penalty_out,my_penalty_out);
156 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
158 //compute inbound penalty
159 double my_penalty_in = 1.0;
160 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
162 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
164 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
166 double penalty = std::max(my_penalty_in,max_penalty_out);
168 double rate_before_update = (*it)->action->getBound();
169 //save initial rate of the action
170 if((*it)->init_rate==-1)
171 (*it)->init_rate= rate_before_update;
173 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
175 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
176 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 );
177 lmm_update_variable_bound(p_maxminSystem, (*it)->action->getVariable(), penalized_bw);
179 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 );
183 XBT_DEBUG("Finished computing IB penalties");
186 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
187 if(updatedlist[root->id]==0){
188 XBT_DEBUG("IB - Updating rec %d", root->id);
189 computeIBfactors(root);
190 updatedlist[root->id]=1;
191 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
192 if(updatedlist[(*it)->destination->id]!=1)
193 updateIBfactors_rec((*it)->destination, updatedlist);
195 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
196 if(updatedlist[it->first->id]!=1)
197 updateIBfactors_rec(it->first, updatedlist);
203 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
204 if (from == to)//disregard local comms (should use loopback)
207 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
208 ActiveComm* comm=NULL;
210 if(to->ActiveCommsDown[from]==1)
211 to->ActiveCommsDown.erase(from);
213 to->ActiveCommsDown[from]-=1;
215 to->nbActiveCommsDown--;
216 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
217 it != from->ActiveCommsUp.end(); ++it) {
218 if((*it)->action==action){
220 from->ActiveCommsUp.erase(it);
228 ActiveComm* comm=new ActiveComm();
230 comm->destination=to;
231 from->ActiveCommsUp.push_back(comm);
233 to->ActiveCommsDown[from]+=1;
234 to->nbActiveCommsDown++;
236 XBT_DEBUG("IB - Updating %d", from->id);
237 updateIBfactors_rec(from, updated);
238 XBT_DEBUG("IB - Finished updating %d", from->id);