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"
12 #include "src/surf/HostImpl.hpp"
13 #include "simgrid/sg_config.h"
14 #include "maxmin_private.hpp"
16 XBT_LOG_EXTERNAL_DEFAULT_CATEGORY(surf_network);
18 static void IB_create_host_callback(simgrid::s4u::Host& host){
19 using namespace simgrid::surf;
22 // pour t->id -> rajouter une nouvelle struct dans le dict, pour stocker les comms actives
23 if(((NetworkIBModel*)surf_network_model)->active_nodes==NULL)
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, NULL);
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 namespace simgrid::surf;
39 if(statein!=simgrid::surf::Action::State::running || stateout!=simgrid::surf::Action::State::done)
41 std::pair<IBNode*,IBNode*> pair = ((NetworkIBModel*)surf_network_model)->active_comms[action];
42 XBT_DEBUG("IB callback - action %p finished", action);
44 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, pair.first, pair.second, 1);
46 ((NetworkIBModel*)surf_network_model)->active_comms.erase(action);
51 static void IB_action_init_callback(
52 simgrid::surf::NetworkAction *action, simgrid::surf::NetCard *src, simgrid::surf::NetCard *dst)
54 simgrid::surf::NetworkIBModel* ibModel = (simgrid::surf::NetworkIBModel*)surf_network_model;
56 simgrid::surf::IBNode* act_src= (simgrid::surf::IBNode*) xbt_dict_get_or_null(ibModel->active_nodes, src->name());
57 xbt_assert(act_src, "could not find src node active comms !");
59 simgrid::surf::IBNode* act_dst= (simgrid::surf::IBNode*) xbt_dict_get_or_null(ibModel->active_nodes, dst->name());
60 xbt_assert(act_dst, "could not find dst node active comms !");
62 ibModel->active_comms[action]=std::make_pair(act_src, act_dst);
64 ibModel->updateIBfactors(action, act_src, act_dst, 0);
71 /************************************************************************/
72 /* New model based on MPI contention model for Infiniband platforms */
73 /************************************************************************/
74 /* @Inproceedings{mescal_vienne_phd, */
75 /* author={Jérôme Vienne}, */
76 /* title={prédiction de performances d’applications de calcul haute performance sur réseau Infiniband}, */
77 /* address={Grenoble FRANCE}, */
81 void surf_network_model_init_IB(void)
83 using simgrid::surf::networkActionStateChangedCallbacks;
85 if (surf_network_model)
88 simgrid::surf::on_link.connect(netlink_parse_init);
89 surf_network_model = new simgrid::surf::NetworkIBModel();
90 xbt_dynar_push(all_existing_models, &surf_network_model);
91 networkActionStateChangedCallbacks.connect(IB_action_state_changed_callback);
92 Link::onCommunicate.connect(IB_action_init_callback);
93 simgrid::s4u::Host::onCreation.connect(IB_create_host_callback);
94 xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
98 #include "src/surf/xml/platf.hpp" // FIXME: move that back to the parsing area
103 NetworkIBModel::NetworkIBModel()
104 : NetworkSmpiModel() {
108 const char* IB_factors_string=sg_cfg_get_string("smpi/IB_penalty_factors");
109 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
111 surf_parse_assert(xbt_dynar_length(radical_elements)==3,
112 "smpi/IB_penalty_factors should be provided and contain 3 elements, semi-colon separated : for example 0.965;0.925;1.35");
114 Be = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 0, char *), "First part of smpi/IB_penalty_factors is not numerical: %s");
115 Bs = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 1, char *), "Second part of smpi/IB_penalty_factors is not numerical: %s");
116 ys = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 2, char *), "Third part of smpi/IB_penalty_factors is not numerical: %s");
118 xbt_dynar_free(&radical_elements);
121 NetworkIBModel::~NetworkIBModel()
123 xbt_dict_cursor_t cursor = NULL;
124 IBNode* instance = NULL;
126 xbt_dict_foreach(active_nodes, cursor, name, instance)
128 xbt_dict_free(&active_nodes);
131 void NetworkIBModel::computeIBfactors(IBNode *root) {
132 double penalized_bw=0.0;
133 double num_comm_out = (double) root->ActiveCommsUp.size();
134 double max_penalty_out=0.0;
135 //first, compute all outbound penalties to get their max
136 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
137 double my_penalty_out = 1.0;
140 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
141 my_penalty_out = num_comm_out * Bs * ys;
143 my_penalty_out = num_comm_out * Bs;
146 max_penalty_out = std::max(max_penalty_out,my_penalty_out);
149 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
151 //compute inbound penalty
152 double my_penalty_in = 1.0;
153 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
155 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
157 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
159 double penalty = std::max(my_penalty_in,max_penalty_out);
161 double rate_before_update = (*it)->action->getBound();
162 //save initial rate of the action
163 if((*it)->init_rate==-1)
164 (*it)->init_rate= rate_before_update;
166 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
168 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
169 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 );
170 lmm_update_variable_bound(maxminSystem_, (*it)->action->getVariable(), penalized_bw);
172 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 );
176 XBT_DEBUG("Finished computing IB penalties");
179 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
180 if(updatedlist[root->id]==0){
181 XBT_DEBUG("IB - Updating rec %d", root->id);
182 computeIBfactors(root);
183 updatedlist[root->id]=1;
184 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
185 if(updatedlist[(*it)->destination->id]!=1)
186 updateIBfactors_rec((*it)->destination, updatedlist);
188 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
189 if(updatedlist[it->first->id]!=1)
190 updateIBfactors_rec(it->first, updatedlist);
196 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
197 if (from == to)//disregard local comms (should use loopback)
200 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
201 ActiveComm* comm=NULL;
203 if(to->ActiveCommsDown[from]==1)
204 to->ActiveCommsDown.erase(from);
206 to->ActiveCommsDown[from]-=1;
208 to->nbActiveCommsDown--;
209 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
210 it != from->ActiveCommsUp.end(); ++it) {
211 if((*it)->action==action){
213 from->ActiveCommsUp.erase(it);
221 ActiveComm* comm=new ActiveComm();
223 comm->destination=to;
224 from->ActiveCommsUp.push_back(comm);
226 to->ActiveCommsDown[from]+=1;
227 to->nbActiveCommsDown++;
229 XBT_DEBUG("IB - Updating %d", from->id);
230 updateIBfactors_rec(from, updated);
231 XBT_DEBUG("IB - Finished updating %d", from->id);