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