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. */
7 #include "network_ib.hpp"
8 #include "simgrid/sg_config.h"
9 #include "maxmin_private.hpp"
10 #include "src/surf/host_interface.hpp"
12 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
14 static void IB_create_host_callback(Host* host){
17 // pour t->id -> rajouter une nouvelle struct dans le dict, pour stocker les comms actives
18 if(((NetworkIBModel*)surf_network_model)->active_nodes==NULL)
19 ((NetworkIBModel*)surf_network_model)->active_nodes=xbt_dict_new();
21 IBNode* act = new IBNode(id);
24 xbt_dict_set(((NetworkIBModel*)surf_network_model)->active_nodes,
25 host->getName(), act, NULL);
29 static void IB_action_state_changed_callback(NetworkAction *action, e_surf_action_state_t statein, e_surf_action_state_t stateout){
30 if(statein!=SURF_ACTION_RUNNING|| stateout!=SURF_ACTION_DONE)
32 std::pair<IBNode*,IBNode*> pair = ((NetworkIBModel*)surf_network_model)->active_comms[action];
33 XBT_DEBUG("IB callback - action %p finished", action);
35 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, pair.first, pair.second, 1);
37 ((NetworkIBModel*)surf_network_model)->active_comms.erase(action);
42 static void IB_action_init_callback(NetworkAction *action,RoutingEdge *src, RoutingEdge *dst, double size, double rate){
43 if(((NetworkIBModel*)surf_network_model)->active_nodes==NULL)
44 xbt_die("IB comm added, without any node connected !");
46 IBNode* act_src= (IBNode*) xbt_dict_get_or_null(((NetworkIBModel*)surf_network_model)->active_nodes, src->getName());
48 xbt_die("could not find src node active comms !");
51 IBNode* act_dst= (IBNode*) xbt_dict_get_or_null(((NetworkIBModel*)surf_network_model)->active_nodes, dst->getName());
53 xbt_die("could not find dst node active comms !");
54 // act_dst->rate=rate;
56 ((NetworkIBModel*)surf_network_model)->active_comms[action]=make_pair(act_src, act_dst);
57 //post the action in the second dist, to retrieve in the other callback
58 XBT_DEBUG("IB callback - action %p init", action);
60 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, act_src, act_dst, 0);
70 /************************************************************************/
71 /* New model based on MPI contention model for Infiniband platforms */
72 /************************************************************************/
73 /* @Inproceedings{mescal_vienne_phd, */
74 /* author={Jérôme Vienne}, */
75 /* title={prédiction de performances d’applications de calcul haute performance sur réseau Infiniband}, */
76 /* address={Grenoble FRANCE}, */
80 void surf_network_model_init_IB(void)
83 if (surf_network_model)
85 surf_network_model = new NetworkIBModel();
86 net_define_callbacks();
87 xbt_dynar_push(all_existing_models, &surf_network_model);
88 surf_callback_connect(networkActionStateChangedCallbacks, IB_action_state_changed_callback);
89 surf_callback_connect(networkCommunicateCallbacks, IB_action_init_callback);
91 hostCreatedCallbacks.connect(IB_create_host_callback);
92 xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
96 NetworkIBModel::NetworkIBModel()
97 : NetworkSmpiModel() {
101 const char* IB_factors_string=sg_cfg_get_string("smpi/IB_penalty_factors");
102 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
104 if(xbt_dynar_length(radical_elements)!=3)
105 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");
107 Be = atof(xbt_dynar_get_as(radical_elements, 0, char *));
108 Bs = atof(xbt_dynar_get_as(radical_elements, 1, char *));
109 ys = atof(xbt_dynar_get_as(radical_elements, 2, char *));
111 xbt_dynar_free(&radical_elements);
114 NetworkIBModel::~NetworkIBModel()
116 xbt_dict_cursor_t cursor = NULL;
117 IBNode* instance = NULL;
119 xbt_dict_foreach(active_nodes, cursor, name, instance)
121 xbt_dict_free(&active_nodes);
124 void NetworkIBModel::computeIBfactors(IBNode *root) {
125 double penalized_bw=0.0;
126 double num_comm_out = (double) root->ActiveCommsUp.size();
127 double max_penalty_out=0.0;
128 //first, compute all outbound penalties to get their max
129 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
130 double my_penalty_out = 1.0;
133 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
134 my_penalty_out = num_comm_out * Bs * ys;
136 my_penalty_out = num_comm_out * Bs;
139 max_penalty_out = max(max_penalty_out,my_penalty_out);
142 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
144 //compute inbound penalty
145 double my_penalty_in = 1.0;
146 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
148 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
150 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
152 double penalty=max(my_penalty_in,max_penalty_out);
154 double rate_before_update = (*it)->action->getBound();
155 //save initial rate of the action
156 if((*it)->init_rate==-1)
157 (*it)->init_rate= rate_before_update;
159 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
161 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
162 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 );
163 lmm_update_variable_bound(p_maxminSystem, (*it)->action->getVariable(), penalized_bw);
165 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 );
169 XBT_DEBUG("Finished computing IB penalties");
172 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
173 if(updatedlist[root->id]==0){
174 XBT_DEBUG("IB - Updating rec %d", root->id);
175 computeIBfactors(root);
176 updatedlist[root->id]=1;
177 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
178 if(updatedlist[(*it)->destination->id]!=1)
179 updateIBfactors_rec((*it)->destination, updatedlist);
181 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
182 if(updatedlist[it->first->id]!=1)
183 updateIBfactors_rec(it->first, updatedlist);
189 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
190 if (from == to)//disregard local comms (should use loopback)
193 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
194 ActiveComm* comm=NULL;
196 if(to->ActiveCommsDown[from]==1)
197 to->ActiveCommsDown.erase(from);
199 to->ActiveCommsDown[from]-=1;
201 to->nbActiveCommsDown--;
202 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
203 it != from->ActiveCommsUp.end(); ++it) {
204 if((*it)->action==action){
206 from->ActiveCommsUp.erase(it);
214 ActiveComm* comm=new ActiveComm();
216 comm->destination=to;
217 from->ActiveCommsUp.push_back(comm);
219 to->ActiveCommsDown[from]+=1;
220 to->nbActiveCommsDown++;
222 XBT_DEBUG("IB - Updating %d", from->id);
223 updateIBfactors_rec(from, updated);
224 XBT_DEBUG("IB - Finished updating %d", from->id);