src/surf/network_interface.cpp

   1 /* Copyright (c) 2013-2015. The SimGrid Team.
   2  * All rights reserved.                                                     */
   3
   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. */
   6
   7 #include <algorithm>
   8
   9 #include "network_interface.hpp"
  10 #include "simgrid/sg_config.h"
  11
  12 #ifndef NETWORK_INTERFACE_CPP_
  13 #define NETWORK_INTERFACE_CPP_
  14
  15 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network, surf,
  16                                 "Logging specific to the SURF network module");
  17
  18 /*********
  19  * C API *
  20  *********/
  21
  22 extern "C" {
  23
  24 const char* sg_link_name(Link *link) {
  25   return link->getName();
  26 }
  27 Link * sg_link_by_name(const char* name) {
  28   return Link::byName(name);
  29 }
  30
  31 int sg_link_is_shared(Link *link){
  32   return link->sharingPolicy();
  33 }
  34 double sg_link_bandwidth(Link *link){
  35   return link->getBandwidth();
  36 }
  37 double sg_link_latency(Link *link){
  38   return link->getLatency();
  39 }
  40 void* sg_link_data(Link *link) {
  41   return link->getData();
  42 }
  43 void sg_link_data_set(Link *link,void *data) {
  44   link->setData(data);
  45 }
  46 int sg_link_count(void) {
  47   return Link::linksCount();
  48 }
  49 Link** sg_link_list(void) {
  50   return Link::linksList();
  51 }
  52 void sg_link_exit(void) {
  53   Link::linksExit();
  54 }
  55
  56 }
  57
  58 /*****************
  59  * List of links *
  60  *****************/
  61
  62 namespace simgrid {
  63 namespace surf {
  64
  65 boost::unordered_map<std::string,Link *> *Link::links = new boost::unordered_map<std::string,Link *>();
  66 Link *Link::byName(const char* name) {
  67     Link * res = NULL;
  68     try {
  69       res = links->at(name);
  70     } catch (std::out_of_range& e) {}
  71
  72     return res;
  73 }
  74 /** @brief Returns the amount of links in the platform */
  75 int Link::linksCount() {
  76     return links->size();
  77 }
  78 /** @brief Returns a list of all existing links */
  79 Link **Link::linksList() {
  80     Link **res = xbt_new(Link*, (int)links->size());
  81     int i=0;
  82     for (auto kv : *links) {
  83       res[i++] = kv.second;
  84     }
  85     return res;
  86 }
  87 /** @brief destructor of the static data */
  88 void Link::linksExit() {
  89   for (auto kv : *links)
  90     (kv.second)->destroy();
  91   delete links;
  92 }
  93
  94 /*************
  95  * Callbacks *
  96  *************/
  97
  98 simgrid::xbt::signal<void(simgrid::surf::Link*)> Link::onCreation;
  99 simgrid::xbt::signal<void(simgrid::surf::Link*)> Link::onDestruction;
 100 simgrid::xbt::signal<void(simgrid::surf::Link*)> Link::onStateChange;
 101
 102 simgrid::xbt::signal<void(simgrid::surf::NetworkAction*, e_surf_action_state_t, e_surf_action_state_t)> networkActionStateChangedCallbacks;
 103 simgrid::xbt::signal<void(simgrid::surf::NetworkAction*, simgrid::surf::NetCard *src, simgrid::surf::NetCard *dst, double size, double rate)> networkCommunicateCallbacks;
 104
 105 }
 106 }
 107
 108 void netlink_parse_init(sg_platf_link_cbarg_t link){
 109   if (link->policy == SURF_LINK_FULLDUPLEX) {
 110     char *link_id;
 111     link_id = bprintf("%s_UP", link->id);
 112     surf_network_model->createLink(link_id,
 113                       link->bandwidth,
 114                       link->bandwidth_trace,
 115                       link->latency,
 116                       link->latency_trace,
 117                       link->state_trace, link->policy, link->properties);
 118     xbt_free(link_id);
 119     link_id = bprintf("%s_DOWN", link->id);
 120     surf_network_model->createLink(link_id,
 121                       link->bandwidth,
 122                       link->bandwidth_trace,
 123                       link->latency,
 124                       link->latency_trace,
 125                       link->state_trace, link->policy, link->properties);
 126     xbt_free(link_id);
 127   } else {
 128     surf_network_model->createLink(link->id,
 129         link->bandwidth,
 130         link->bandwidth_trace,
 131         link->latency,
 132         link->latency_trace,
 133         link->state_trace, link->policy, link->properties);
 134   }
 135 }
 136
 137 /*********
 138  * Model *
 139  *********/
 140
 141 simgrid::surf::NetworkModel *surf_network_model = NULL;
 142
 143 namespace simgrid {
 144 namespace surf {
 145
 146 double NetworkModel::latencyFactor(double /*size*/) {
 147   return sg_latency_factor;
 148 }
 149
 150 double NetworkModel::bandwidthFactor(double /*size*/) {
 151   return sg_bandwidth_factor;
 152 }
 153
 154 double NetworkModel::bandwidthConstraint(double rate, double /*bound*/, double /*size*/) {
 155   return rate;
 156 }
 157
 158 double NetworkModel::next_occuring_event_full(double now)
 159 {
 160   NetworkAction *action = NULL;
 161   ActionList *runningActions = surf_network_model->getRunningActionSet();
 162   double minRes;
 163
 164   minRes = shareResourcesMaxMin(runningActions, surf_network_model->p_maxminSystem, surf_network_model->f_networkSolve);
 165
 166   for(ActionList::iterator it(runningActions->begin()), itend(runningActions->end())
 167        ; it != itend ; ++it) {
 168       action = static_cast<NetworkAction*>(&*it);
 169 #ifdef HAVE_LATENCY_BOUND_TRACKING
 170     if (lmm_is_variable_limited_by_latency(action->getVariable())) {
 171       action->m_latencyLimited = 1;
 172     } else {
 173       action->m_latencyLimited = 0;
 174     }
 175 #endif
 176     if (action->m_latency > 0) {
 177       minRes = (minRes < 0) ? action->m_latency : std::min(minRes, action->m_latency);
 178     }
 179   }
 180
 181   XBT_DEBUG("Min of share resources %f", minRes);
 182
 183   return minRes;
 184 }
 185
 186 /************
 187  * Resource *
 188  ************/
 189
 190 Link::Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props)
 191 : Resource(model, name),
 192   PropertyHolder(props)
 193 {
 194   links->insert({name, this});
 195
 196   m_latency.scale = 1;
 197   m_bandwidth.scale = 1;
 198   XBT_DEBUG("Create link '%s'",name);
 199 }
 200
 201 Link::Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props,
 202                      lmm_constraint_t constraint,
 203                        tmgr_trace_t state_trace)
 204 : Resource(model, name, constraint),
 205   PropertyHolder(props)
 206 {
 207   m_latency.scale = 1;
 208   m_bandwidth.scale = 1;
 209   if (state_trace)
 210     m_stateEvent = future_evt_set->add_trace(state_trace, 0.0, this);
 211
 212   links->insert({name, this});
 213   XBT_DEBUG("Create link '%s'",name);
 214
 215 }
 216
 217 /** @brief use destroy() instead of this destructor */
 218 Link::~Link() {
 219   xbt_assert(currentlyDestroying_, "Don't delete Links directly. Call destroy() instead.");
 220 }
 221 /** @brief Fire the require callbacks and destroy the object
 222  *
 223  * Don't delete directly an Link, call l->destroy() instead.
 224  */
 225 void Link::destroy()
 226 {
 227   if (!currentlyDestroying_) {
 228     currentlyDestroying_ = true;
 229     onDestruction(this);
 230     delete this;
 231   }
 232 }
 233
 234 bool Link::isUsed()
 235 {
 236   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 237 }
 238
 239 double Link::getLatency()
 240 {
 241   return m_latency.peak * m_latency.scale;
 242 }
 243
 244 double Link::getBandwidth()
 245 {
 246   return m_bandwidth.peak * m_bandwidth.scale;
 247 }
 248
 249 int Link::sharingPolicy()
 250 {
 251   return lmm_constraint_sharing_policy(getConstraint());
 252 }
 253
 254 void Link::turnOn(){
 255   if (isOff()) {
 256     Resource::turnOn();
 257     onStateChange(this);
 258   }
 259 }
 260 void Link::turnOff(){
 261   if (isOn()) {
 262     Resource::turnOff();
 263     onStateChange(this);
 264   }
 265 }
 266 void Link::set_state_trace(tmgr_trace_t trace)
 267 {
 268   xbt_assert(m_stateEvent==NULL,"Cannot set a second state trace to Link %s", getName());
 269
 270   m_stateEvent = future_evt_set->add_trace(trace, 0.0, this);
 271 }
 272 void Link::set_bandwidth_trace(tmgr_trace_t trace)
 273 {
 274   xbt_assert(m_bandwidth.event==NULL,"Cannot set a second bandwidth trace to Link %s", getName());
 275
 276   m_bandwidth.event = future_evt_set->add_trace(trace, 0.0, this);
 277 }
 278 void Link::set_latency_trace(tmgr_trace_t trace)
 279 {
 280   xbt_assert(m_latency.event==NULL,"Cannot set a second latency trace to Link %s", getName());
 281
 282   m_latency.event = future_evt_set->add_trace(trace, 0.0, this);
 283 }
 284
 285
 286 /**********
 287  * Action *
 288  **********/
 289
 290 void NetworkAction::setState(e_surf_action_state_t state){
 291   e_surf_action_state_t old = getState();
 292   Action::setState(state);
 293   networkActionStateChangedCallbacks(this, old, state);
 294 }
 295
 296 }
 297 }
 298
 299 #endif /* NETWORK_INTERFACE_CPP_ */