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 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==nullptr)
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, nullptr);
33 static void IB_action_state_changed_callback(
34 simgrid::surf::NetworkAction *action,
35 simgrid::surf::Action::State statein, simgrid::surf::Action::State stateout)
37 using namespace simgrid::surf;
38 if(statein!=simgrid::surf::Action::State::running || stateout!=simgrid::surf::Action::State::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::routing::NetCard *src, simgrid::routing::NetCard *dst)
53 simgrid::surf::NetworkIBModel* ibModel = (simgrid::surf::NetworkIBModel*)surf_network_model;
55 simgrid::surf::IBNode* act_src= (simgrid::surf::IBNode*) xbt_dict_get_or_null(ibModel->active_nodes, src->name());
56 xbt_assert(act_src, "could not find src node active comms !");
58 simgrid::surf::IBNode* act_dst= (simgrid::surf::IBNode*) xbt_dict_get_or_null(ibModel->active_nodes, dst->name());
59 xbt_assert(act_dst, "could not find dst node active comms !");
61 ibModel->active_comms[action]=std::make_pair(act_src, act_dst);
63 ibModel->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)
82 using simgrid::surf::networkActionStateChangedCallbacks;
84 if (surf_network_model)
87 surf_network_model = new simgrid::surf::NetworkIBModel();
88 xbt_dynar_push(all_existing_models, &surf_network_model);
89 networkActionStateChangedCallbacks.connect(IB_action_state_changed_callback);
90 Link::onCommunicate.connect(IB_action_init_callback);
91 simgrid::s4u::Host::onCreation.connect(IB_create_host_callback);
92 xbt_cfg_setdefault_double("network/weight-S", 8775);
96 #include "src/surf/xml/platf.hpp" // FIXME: move that back to the parsing area
101 NetworkIBModel::NetworkIBModel()
102 : NetworkSmpiModel() {
104 active_nodes=nullptr;
106 const char* IB_factors_string=xbt_cfg_get_string("smpi/IB-penalty-factors");
107 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
109 surf_parse_assert(xbt_dynar_length(radical_elements)==3,
110 "smpi/IB-penalty-factors should be provided and contain 3 elements, semi-colon separated. Example: 0.965;0.925;1.35");
112 Be = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 0, char *), "First part of smpi/IB-penalty-factors is not numerical: %s");
113 Bs = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 1, char *), "Second part of smpi/IB-penalty-factors is not numerical: %s");
114 ys = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 2, char *), "Third part of smpi/IB-penalty-factors is not numerical: %s");
116 xbt_dynar_free(&radical_elements);
119 NetworkIBModel::~NetworkIBModel()
121 xbt_dict_cursor_t cursor = nullptr;
122 IBNode* instance = nullptr;
123 char *name = nullptr;
124 xbt_dict_foreach(active_nodes, cursor, name, instance)
126 xbt_dict_free(&active_nodes);
129 void NetworkIBModel::computeIBfactors(IBNode *root) {
130 double penalized_bw=0.0;
131 double num_comm_out = (double) root->ActiveCommsUp.size();
132 double max_penalty_out=0.0;
133 //first, compute all outbound penalties to get their max
134 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
135 double my_penalty_out = 1.0;
138 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
139 my_penalty_out = num_comm_out * Bs * ys;
141 my_penalty_out = num_comm_out * Bs;
144 max_penalty_out = std::max(max_penalty_out,my_penalty_out);
147 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
149 //compute inbound penalty
150 double my_penalty_in = 1.0;
151 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
153 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
155 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
157 double penalty = std::max(my_penalty_in,max_penalty_out);
159 double rate_before_update = (*it)->action->getBound();
160 //save initial rate of the action
161 if((*it)->init_rate==-1)
162 (*it)->init_rate= rate_before_update;
164 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
166 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
167 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 );
168 lmm_update_variable_bound(maxminSystem_, (*it)->action->getVariable(), penalized_bw);
170 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 );
174 XBT_DEBUG("Finished computing IB penalties");
177 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
178 if(updatedlist[root->id]==0){
179 XBT_DEBUG("IB - Updating rec %d", root->id);
180 computeIBfactors(root);
181 updatedlist[root->id]=1;
182 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
183 if(updatedlist[(*it)->destination->id]!=1)
184 updateIBfactors_rec((*it)->destination, updatedlist);
186 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
187 if(updatedlist[it->first->id]!=1)
188 updateIBfactors_rec(it->first, updatedlist);
194 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
195 if (from == to)//disregard local comms (should use loopback)
198 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
199 ActiveComm* comm=nullptr;
201 if(to->ActiveCommsDown[from]==1)
202 to->ActiveCommsDown.erase(from);
204 to->ActiveCommsDown[from]-=1;
206 to->nbActiveCommsDown--;
207 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
208 it != from->ActiveCommsUp.end(); ++it) {
209 if((*it)->action==action){
211 from->ActiveCommsUp.erase(it);
219 ActiveComm* comm=new ActiveComm();
221 comm->destination=to;
222 from->ActiveCommsUp.push_back(comm);
224 to->ActiveCommsDown[from]+=1;
225 to->nbActiveCommsDown++;
227 XBT_DEBUG("IB - Updating %d", from->id);
228 updateIBfactors_rec(from, updated);
229 XBT_DEBUG("IB - Finished updating %d", from->id);