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 surf_network_model = new simgrid::surf::NetworkIBModel();
89 xbt_dynar_push(all_existing_models, &surf_network_model);
90 networkActionStateChangedCallbacks.connect(IB_action_state_changed_callback);
91 Link::onCommunicate.connect(IB_action_init_callback);
92 simgrid::s4u::Host::onCreation.connect(IB_create_host_callback);
93 xbt_cfg_setdefault_double("network/weight_S", 8775);
97 #include "src/surf/xml/platf.hpp" // FIXME: move that back to the parsing area
102 NetworkIBModel::NetworkIBModel()
103 : NetworkSmpiModel() {
107 const char* IB_factors_string=xbt_cfg_get_string("smpi/IB_penalty_factors");
108 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
110 surf_parse_assert(xbt_dynar_length(radical_elements)==3,
111 "smpi/IB_penalty_factors should be provided and contain 3 elements, semi-colon separated : for example 0.965;0.925;1.35");
113 Be = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 0, char *), "First part of smpi/IB_penalty_factors is not numerical: %s");
114 Bs = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 1, char *), "Second part of smpi/IB_penalty_factors is not numerical: %s");
115 ys = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 2, char *), "Third part of smpi/IB_penalty_factors is not numerical: %s");
117 xbt_dynar_free(&radical_elements);
120 NetworkIBModel::~NetworkIBModel()
122 xbt_dict_cursor_t cursor = NULL;
123 IBNode* instance = NULL;
125 xbt_dict_foreach(active_nodes, cursor, name, instance)
127 xbt_dict_free(&active_nodes);
130 void NetworkIBModel::computeIBfactors(IBNode *root) {
131 double penalized_bw=0.0;
132 double num_comm_out = (double) root->ActiveCommsUp.size();
133 double max_penalty_out=0.0;
134 //first, compute all outbound penalties to get their max
135 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
136 double my_penalty_out = 1.0;
139 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
140 my_penalty_out = num_comm_out * Bs * ys;
142 my_penalty_out = num_comm_out * Bs;
145 max_penalty_out = std::max(max_penalty_out,my_penalty_out);
148 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
150 //compute inbound penalty
151 double my_penalty_in = 1.0;
152 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
154 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
156 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
158 double penalty = std::max(my_penalty_in,max_penalty_out);
160 double rate_before_update = (*it)->action->getBound();
161 //save initial rate of the action
162 if((*it)->init_rate==-1)
163 (*it)->init_rate= rate_before_update;
165 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
167 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
168 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 );
169 lmm_update_variable_bound(maxminSystem_, (*it)->action->getVariable(), penalized_bw);
171 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 );
175 XBT_DEBUG("Finished computing IB penalties");
178 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
179 if(updatedlist[root->id]==0){
180 XBT_DEBUG("IB - Updating rec %d", root->id);
181 computeIBfactors(root);
182 updatedlist[root->id]=1;
183 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
184 if(updatedlist[(*it)->destination->id]!=1)
185 updateIBfactors_rec((*it)->destination, updatedlist);
187 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
188 if(updatedlist[it->first->id]!=1)
189 updateIBfactors_rec(it->first, updatedlist);
195 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
196 if (from == to)//disregard local comms (should use loopback)
199 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
200 ActiveComm* comm=NULL;
202 if(to->ActiveCommsDown[from]==1)
203 to->ActiveCommsDown.erase(from);
205 to->ActiveCommsDown[from]-=1;
207 to->nbActiveCommsDown--;
208 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
209 it != from->ActiveCommsUp.end(); ++it) {
210 if((*it)->action==action){
212 from->ActiveCommsUp.erase(it);
220 ActiveComm* comm=new ActiveComm();
222 comm->destination=to;
223 from->ActiveCommsUp.push_back(comm);
225 to->ActiveCommsDown[from]+=1;
226 to->nbActiveCommsDown++;
228 XBT_DEBUG("IB - Updating %d", from->id);
229 updateIBfactors_rec(from, updated);
230 XBT_DEBUG("IB - Finished updating %d", from->id);