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"
11 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
13 static void IB_create_host_callback(sg_platf_host_cbarg_t t){
16 // pour t->id -> rajouter une nouvelle struct dans le dict, pour stocker les comms actives
17 if(((NetworkIBModel*)surf_network_model)->active_nodes==NULL)
18 ((NetworkIBModel*)surf_network_model)->active_nodes=xbt_dict_new();
20 IBNode* act = new IBNode(id);
23 xbt_dict_set(((NetworkIBModel*)surf_network_model)->active_nodes, t->id, act, NULL);
27 static void IB_action_state_changed_callback(NetworkAction *action, e_surf_action_state_t statein, e_surf_action_state_t stateout){
28 if(statein!=SURF_ACTION_RUNNING|| stateout!=SURF_ACTION_DONE)
30 std::pair<IBNode*,IBNode*> pair = ((NetworkIBModel*)surf_network_model)->active_comms[action];
31 XBT_DEBUG("IB callback - action %p finished", action);
33 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, pair.first, pair.second, 1);
35 ((NetworkIBModel*)surf_network_model)->active_comms.erase(action);
40 static void IB_action_init_callback(NetworkAction *action,RoutingEdge *src, RoutingEdge *dst, double size, double rate){
41 if(((NetworkIBModel*)surf_network_model)->active_nodes==NULL)
42 xbt_die("IB comm added, without any node connected !");
44 IBNode* act_src= (IBNode*) xbt_dict_get_or_null(((NetworkIBModel*)surf_network_model)->active_nodes, src->getName());
46 xbt_die("could not find src node active comms !");
49 IBNode* act_dst= (IBNode*) xbt_dict_get_or_null(((NetworkIBModel*)surf_network_model)->active_nodes, dst->getName());
51 xbt_die("could not find dst node active comms !");
52 // act_dst->rate=rate;
54 ((NetworkIBModel*)surf_network_model)->active_comms[action]=make_pair(act_src, act_dst);
55 //post the action in the second dist, to retrieve in the other callback
56 XBT_DEBUG("IB callback - action %p init", action);
58 ((NetworkIBModel*)surf_network_model)->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(void)
81 if (surf_network_model)
83 surf_network_model = new NetworkIBModel();
84 net_define_callbacks();
85 xbt_dynar_push(model_list, &surf_network_model);
86 surf_callback_connect(networkActionStateChangedCallbacks, IB_action_state_changed_callback);
87 surf_callback_connect(networkCommunicateCallbacks, IB_action_init_callback);
89 sg_platf_host_add_cb(IB_create_host_callback);
90 xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
94 NetworkIBModel::NetworkIBModel()
95 : NetworkSmpiModel() {
99 const char* IB_factors_string=sg_cfg_get_string("smpi/IB_penalty_factors");
100 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
102 if(xbt_dynar_length(radical_elements)!=3)
103 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");
105 Be = atof(xbt_dynar_get_as(radical_elements, 0, char *));
106 Bs = atof(xbt_dynar_get_as(radical_elements, 1, char *));
107 ys = atof(xbt_dynar_get_as(radical_elements, 2, char *));
109 xbt_dynar_free(&radical_elements);
112 NetworkIBModel::~NetworkIBModel()
114 xbt_dict_cursor_t cursor = NULL;
115 IBNode* instance = NULL;
117 xbt_dict_foreach(active_nodes, cursor, name, instance)
119 xbt_dict_free(&active_nodes);
122 void NetworkIBModel::computeIBfactors(IBNode *root) {
123 double penalized_bw=0.0;
124 double num_comm_out = (double) root->ActiveCommsUp.size();
125 double max_penalty_out=0.0;
126 //first, compute all outbound penalties to get their max
127 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
128 double my_penalty_out = 1.0;
131 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
132 my_penalty_out = num_comm_out * Bs * ys;
134 my_penalty_out = num_comm_out * Bs;
137 max_penalty_out = max(max_penalty_out,my_penalty_out);
140 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
142 //compute inbound penalty
143 double my_penalty_in = 1.0;
144 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
146 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
148 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
150 double penalty=max(my_penalty_in,max_penalty_out);
152 double rate_before_update = (*it)->action->getBound();
153 //save initial rate of the action
154 if((*it)->init_rate==-1)
155 (*it)->init_rate= rate_before_update;
157 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
159 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
160 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 );
161 lmm_update_variable_bound(p_maxminSystem, (*it)->action->getVariable(), penalized_bw);
163 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 );
167 XBT_DEBUG("Finished computing IB penalties");
170 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
171 if(updatedlist[root->id]==0){
172 XBT_DEBUG("IB - Updating rec %d", root->id);
173 computeIBfactors(root);
174 updatedlist[root->id]=1;
175 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
176 if(updatedlist[(*it)->destination->id]!=1)
177 updateIBfactors_rec((*it)->destination, updatedlist);
179 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
180 if(updatedlist[it->first->id]!=1)
181 updateIBfactors_rec(it->first, updatedlist);
187 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
188 if (from == to)//disregard local comms (should use loopback)
191 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
192 ActiveComm* comm=NULL;
194 if(to->ActiveCommsDown[from]==1)
195 to->ActiveCommsDown.erase(from);
197 to->ActiveCommsDown[from]-=1;
199 to->nbActiveCommsDown--;
200 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
201 it != from->ActiveCommsUp.end(); ++it) {
202 if((*it)->action==action){
204 from->ActiveCommsUp.erase(it);
212 ActiveComm* comm=new ActiveComm();
214 comm->destination=to;
215 from->ActiveCommsUp.push_back(comm);
217 to->ActiveCommsDown[from]+=1;
218 to->nbActiveCommsDown++;
220 XBT_DEBUG("IB - Updating %d", from->id);
221 updateIBfactors_rec(from, updated);
222 XBT_DEBUG("IB - Finished updating %d", from->id);