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 e_surf_action_state_t statein, e_surf_action_state_t stateout)
38 using namespace simgrid::surf;
39 if(statein!=SURF_ACTION_RUNNING|| stateout!=SURF_ACTION_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,
53 double size, double rate)
55 using namespace simgrid::surf;
56 if(((NetworkIBModel*)surf_network_model)->active_nodes==NULL)
57 xbt_die("IB comm added, without any node connected !");
59 IBNode* act_src= (IBNode*) xbt_dict_get_or_null(((NetworkIBModel*)surf_network_model)->active_nodes, src->name());
61 xbt_die("could not find src node active comms !");
64 IBNode* act_dst= (IBNode*) xbt_dict_get_or_null(((NetworkIBModel*)surf_network_model)->active_nodes, dst->name());
66 xbt_die("could not find dst node active comms !");
67 // act_dst->rate=rate;
69 ((NetworkIBModel*)surf_network_model)->active_comms[action]=std::make_pair(act_src, act_dst);
70 //post the action in the second dist, to retrieve in the other callback
71 XBT_DEBUG("IB callback - action %p init", action);
73 ((NetworkIBModel*)surf_network_model)->updateIBfactors(action, act_src, act_dst, 0);
81 /************************************************************************/
82 /* New model based on MPI contention model for Infiniband platforms */
83 /************************************************************************/
84 /* @Inproceedings{mescal_vienne_phd, */
85 /* author={Jérôme Vienne}, */
86 /* title={prédiction de performances d’applications de calcul haute performance sur réseau Infiniband}, */
87 /* address={Grenoble FRANCE}, */
91 void surf_network_model_init_IB(void)
93 using simgrid::surf::networkActionStateChangedCallbacks;
94 using simgrid::surf::networkCommunicateCallbacks;
96 if (surf_network_model)
99 simgrid::surf::on_link.connect(netlink_parse_init);
100 surf_network_model = new simgrid::surf::NetworkIBModel();
101 xbt_dynar_push(all_existing_models, &surf_network_model);
102 networkActionStateChangedCallbacks.connect(IB_action_state_changed_callback);
103 networkCommunicateCallbacks.connect(IB_action_init_callback);
104 simgrid::s4u::Host::onCreation.connect(IB_create_host_callback);
105 xbt_cfg_setdefault_double(_sg_cfg_set, "network/weight_S", 8775);
109 #include "src/surf/xml/platf.hpp" // FIXME: move that back to the parsing area
114 NetworkIBModel::NetworkIBModel()
115 : NetworkSmpiModel() {
119 const char* IB_factors_string=sg_cfg_get_string("smpi/IB_penalty_factors");
120 xbt_dynar_t radical_elements = xbt_str_split(IB_factors_string, ";");
122 surf_parse_assert(xbt_dynar_length(radical_elements)==3,
123 "smpi/IB_penalty_factors should be provided and contain 3 elements, semi-colon separated : for example 0.965;0.925;1.35");
125 Be = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 0, char *), "First part of smpi/IB_penalty_factors is not numerical: %s");
126 Bs = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 1, char *), "Second part of smpi/IB_penalty_factors is not numerical: %s");
127 ys = xbt_str_parse_double(xbt_dynar_get_as(radical_elements, 2, char *), "Third part of smpi/IB_penalty_factors is not numerical: %s");
129 xbt_dynar_free(&radical_elements);
132 NetworkIBModel::~NetworkIBModel()
134 xbt_dict_cursor_t cursor = NULL;
135 IBNode* instance = NULL;
137 xbt_dict_foreach(active_nodes, cursor, name, instance)
139 xbt_dict_free(&active_nodes);
142 void NetworkIBModel::computeIBfactors(IBNode *root) {
143 double penalized_bw=0.0;
144 double num_comm_out = (double) root->ActiveCommsUp.size();
145 double max_penalty_out=0.0;
146 //first, compute all outbound penalties to get their max
147 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
148 double my_penalty_out = 1.0;
151 if((*it)->destination->nbActiveCommsDown > 2)//number of comms sent to the receiving node
152 my_penalty_out = num_comm_out * Bs * ys;
154 my_penalty_out = num_comm_out * Bs;
157 max_penalty_out = std::max(max_penalty_out,my_penalty_out);
160 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
162 //compute inbound penalty
163 double my_penalty_in = 1.0;
164 int nb_comms = (*it)->destination->nbActiveCommsDown;//total number of incoming comms
166 my_penalty_in = ((*it)->destination->ActiveCommsDown)[root] //number of comm sent to dest by root node
168 * (*it)->destination->ActiveCommsDown.size();//number of different nodes sending to dest
170 double penalty = std::max(my_penalty_in,max_penalty_out);
172 double rate_before_update = (*it)->action->getBound();
173 //save initial rate of the action
174 if((*it)->init_rate==-1)
175 (*it)->init_rate= rate_before_update;
177 penalized_bw= ! num_comm_out ? (*it)->init_rate : (*it)->init_rate /penalty;
179 if (!double_equals(penalized_bw, rate_before_update, sg_surf_precision)){
180 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 );
181 lmm_update_variable_bound(maxminSystem_, (*it)->action->getVariable(), penalized_bw);
183 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 );
187 XBT_DEBUG("Finished computing IB penalties");
190 void NetworkIBModel::updateIBfactors_rec(IBNode *root, bool* updatedlist) {
191 if(updatedlist[root->id]==0){
192 XBT_DEBUG("IB - Updating rec %d", root->id);
193 computeIBfactors(root);
194 updatedlist[root->id]=1;
195 for (std::vector<ActiveComm*>::iterator it= root->ActiveCommsUp.begin(); it != root->ActiveCommsUp.end(); ++it) {
196 if(updatedlist[(*it)->destination->id]!=1)
197 updateIBfactors_rec((*it)->destination, updatedlist);
199 for (std::map<IBNode*, int>::iterator it= root->ActiveCommsDown.begin(); it != root->ActiveCommsDown.end(); ++it) {
200 if(updatedlist[it->first->id]!=1)
201 updateIBfactors_rec(it->first, updatedlist);
207 void NetworkIBModel::updateIBfactors(NetworkAction *action, IBNode *from, IBNode * to, int remove) {
208 if (from == to)//disregard local comms (should use loopback)
211 bool* updated=(bool*)xbt_malloc0(xbt_dict_size(active_nodes)*sizeof(bool));
212 ActiveComm* comm=NULL;
214 if(to->ActiveCommsDown[from]==1)
215 to->ActiveCommsDown.erase(from);
217 to->ActiveCommsDown[from]-=1;
219 to->nbActiveCommsDown--;
220 for (std::vector<ActiveComm*>::iterator it= from->ActiveCommsUp.begin();
221 it != from->ActiveCommsUp.end(); ++it) {
222 if((*it)->action==action){
224 from->ActiveCommsUp.erase(it);
232 ActiveComm* comm=new ActiveComm();
234 comm->destination=to;
235 from->ActiveCommsUp.push_back(comm);
237 to->ActiveCommsDown[from]+=1;
238 to->nbActiveCommsDown++;
240 XBT_DEBUG("IB - Updating %d", from->id);
241 updateIBfactors_rec(from, updated);
242 XBT_DEBUG("IB - Finished updating %d", from->id);