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     Link *l = surf_network_model->createLink(link_id,
 113         link->bandwidth,
 114         link->bandwidth_trace,
 115         link->latency,
 116         link->latency_trace,
 117         link->policy, link->properties);
 118     if (link->state_trace)
 119       l->setStateTrace(link->state_trace);
 120
 121     xbt_free(link_id);
 122     link_id = bprintf("%s_DOWN", link->id);
 123     l = surf_network_model->createLink(link_id,
 124         link->bandwidth,
 125         link->bandwidth_trace,
 126         link->latency,
 127         link->latency_trace,
 128         link->policy, link->properties);
 129     if (link->state_trace)
 130       l->setStateTrace(link->state_trace);
 131     xbt_free(link_id);
 132   } else {
 133     Link *l=surf_network_model->createLink(link->id,
 134         link->bandwidth,
 135         link->bandwidth_trace,
 136         link->latency,
 137         link->latency_trace,
 138         link->policy, link->properties);
 139     if (link->state_trace)
 140       l->setStateTrace(link->state_trace);
 141   }
 142 }
 143
 144 /*********
 145  * Model *
 146  *********/
 147
 148 simgrid::surf::NetworkModel *surf_network_model = NULL;
 149
 150 namespace simgrid {
 151   namespace surf {
 152
 153     double NetworkModel::latencyFactor(double /*size*/) {
 154       return sg_latency_factor;
 155     }
 156
 157     double NetworkModel::bandwidthFactor(double /*size*/) {
 158       return sg_bandwidth_factor;
 159     }
 160
 161     double NetworkModel::bandwidthConstraint(double rate, double /*bound*/, double /*size*/) {
 162       return rate;
 163     }
 164
 165     double NetworkModel::next_occuring_event_full(double now)
 166     {
 167       NetworkAction *action = NULL;
 168       ActionList *runningActions = surf_network_model->getRunningActionSet();
 169       double minRes;
 170
 171       minRes = shareResourcesMaxMin(runningActions, surf_network_model->p_maxminSystem, surf_network_model->f_networkSolve);
 172
 173       for(ActionList::iterator it(runningActions->begin()), itend(runningActions->end())
 174           ; it != itend ; ++it) {
 175         action = static_cast<NetworkAction*>(&*it);
 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, lmm_constraint_t constraint)
 202     : Resource(model, name, constraint),
 203       PropertyHolder(props)
 204     {
 205       m_latency.scale = 1;
 206       m_bandwidth.scale = 1;
 207
 208       links->insert({name, this});
 209       XBT_DEBUG("Create link '%s'",name);
 210
 211     }
 212     void Link::setStateTrace(tmgr_trace_t trace) {
 213       if (m_stateEvent != nullptr)
 214         XBT_INFO("Changing the state trace is not well tested. You're on your own.");
 215       m_stateEvent = future_evt_set->add_trace(trace, 0.0, this);
 216     }
 217
 218     /** @brief use destroy() instead of this destructor */
 219     Link::~Link() {
 220       xbt_assert(currentlyDestroying_, "Don't delete Links directly. Call destroy() instead.");
 221     }
 222     /** @brief Fire the require callbacks and destroy the object
 223      *
 224      * Don't delete directly an Link, call l->destroy() instead.
 225      */
 226     void Link::destroy()
 227     {
 228       if (!currentlyDestroying_) {
 229         currentlyDestroying_ = true;
 230         onDestruction(this);
 231         delete this;
 232       }
 233     }
 234
 235     bool Link::isUsed()
 236     {
 237       return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 238     }
 239
 240     double Link::getLatency()
 241     {
 242       return m_latency.peak * m_latency.scale;
 243     }
 244
 245     double Link::getBandwidth()
 246     {
 247       return m_bandwidth.peak * m_bandwidth.scale;
 248     }
 249
 250     int Link::sharingPolicy()
 251     {
 252       return lmm_constraint_sharing_policy(getConstraint());
 253     }
 254
 255     void Link::turnOn(){
 256       if (isOff()) {
 257         Resource::turnOn();
 258         onStateChange(this);
 259       }
 260     }
 261     void Link::turnOff(){
 262       if (isOn()) {
 263         Resource::turnOff();
 264         onStateChange(this);
 265       }
 266     }
 267     void Link::set_state_trace(tmgr_trace_t trace)
 268     {
 269       xbt_assert(m_stateEvent==NULL,"Cannot set a second state trace to Link %s", getName());
 270
 271       m_stateEvent = future_evt_set->add_trace(trace, 0.0, this);
 272     }
 273     void Link::set_bandwidth_trace(tmgr_trace_t trace)
 274     {
 275       xbt_assert(m_bandwidth.event==NULL,"Cannot set a second bandwidth trace to Link %s", getName());
 276
 277       m_bandwidth.event = future_evt_set->add_trace(trace, 0.0, this);
 278     }
 279     void Link::set_latency_trace(tmgr_trace_t trace)
 280     {
 281       xbt_assert(m_latency.event==NULL,"Cannot set a second latency trace to Link %s", getName());
 282
 283       m_latency.event = future_evt_set->add_trace(trace, 0.0, this);
 284     }
 285
 286
 287     /**********
 288      * Action *
 289      **********/
 290
 291     void NetworkAction::setState(e_surf_action_state_t state){
 292       e_surf_action_state_t old = getState();
 293       Action::setState(state);
 294       networkActionStateChangedCallbacks(this, old, state);
 295     }
 296
 297   }
 298 }
 299
 300 #endif /* NETWORK_INTERFACE_CPP_ */