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)> Link::onCommunicate;
 100
 101   }
 102 }
 103
 104 /*********
 105  * Model *
 106  *********/
 107
 108 simgrid::surf::NetworkModel *surf_network_model = NULL;
 109
 110 namespace simgrid {
 111   namespace surf {
 112
 113     double NetworkModel::latencyFactor(double /*size*/) {
 114       return sg_latency_factor;
 115     }
 116
 117     double NetworkModel::bandwidthFactor(double /*size*/) {
 118       return sg_bandwidth_factor;
 119     }
 120
 121     double NetworkModel::bandwidthConstraint(double rate, double /*bound*/, double /*size*/) {
 122       return rate;
 123     }
 124
 125     double NetworkModel::next_occuring_event_full(double now)
 126     {
 127       NetworkAction *action = NULL;
 128       ActionList *runningActions = surf_network_model->getRunningActionSet();
 129       double minRes;
 130
 131       minRes = shareResourcesMaxMin(runningActions, surf_network_model->maxminSystem_, surf_network_model->f_networkSolve);
 132
 133       for(ActionList::iterator it(runningActions->begin()), itend(runningActions->end())
 134           ; it != itend ; ++it) {
 135         action = static_cast<NetworkAction*>(&*it);
 136         if (action->latency_ > 0) {
 137           minRes = (minRes < 0) ? action->latency_ : std::min(minRes, action->latency_);
 138         }
 139       }
 140
 141       XBT_DEBUG("Min of share resources %f", minRes);
 142
 143       return minRes;
 144     }
 145
 146     /************
 147      * Resource *
 148      ************/
 149
 150     Link::Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props)
 151     : Resource(model, name),
 152       PropertyHolder(props)
 153     {
 154       links->insert({name, this});
 155
 156       m_latency.scale = 1;
 157       m_bandwidth.scale = 1;
 158       XBT_DEBUG("Create link '%s'",name);
 159     }
 160
 161     Link::Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props, lmm_constraint_t constraint)
 162     : Resource(model, name, constraint),
 163       PropertyHolder(props)
 164     {
 165       if (strcmp(name,"__loopback__"))
 166         xbt_assert(!Link::byName(name), "Link '%s' declared several times in the platform.", name);
 167
 168       m_latency.scale = 1;
 169       m_bandwidth.scale = 1;
 170
 171       links->insert({name, this});
 172       XBT_DEBUG("Create link '%s'",name);
 173
 174     }
 175
 176     /** @brief use destroy() instead of this destructor */
 177     Link::~Link() {
 178       xbt_assert(currentlyDestroying_, "Don't delete Links directly. Call destroy() instead.");
 179     }
 180     /** @brief Fire the require callbacks and destroy the object
 181      *
 182      * Don't delete directly an Link, call l->destroy() instead.
 183      */
 184     void Link::destroy()
 185     {
 186       if (!currentlyDestroying_) {
 187         currentlyDestroying_ = true;
 188         onDestruction(this);
 189         delete this;
 190       }
 191     }
 192
 193     bool Link::isUsed()
 194     {
 195       return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 196     }
 197
 198     double Link::getLatency()
 199     {
 200       return m_latency.peak * m_latency.scale;
 201     }
 202
 203     double Link::getBandwidth()
 204     {
 205       return m_bandwidth.peak * m_bandwidth.scale;
 206     }
 207
 208     int Link::sharingPolicy()
 209     {
 210       return lmm_constraint_sharing_policy(getConstraint());
 211     }
 212
 213     void Link::turnOn(){
 214       if (isOff()) {
 215         Resource::turnOn();
 216         onStateChange(this);
 217       }
 218     }
 219     void Link::turnOff(){
 220       if (isOn()) {
 221         Resource::turnOff();
 222         onStateChange(this);
 223       }
 224     }
 225     void Link::setStateTrace(tmgr_trace_t trace) {
 226       xbt_assert(m_stateEvent==NULL,"Cannot set a second state trace to Link %s", getName());
 227       m_stateEvent = future_evt_set->add_trace(trace, 0.0, this);
 228     }
 229     void Link::setBandwidthTrace(tmgr_trace_t trace)
 230     {
 231       xbt_assert(m_bandwidth.event==NULL,"Cannot set a second bandwidth trace to Link %s", getName());
 232       m_bandwidth.event = future_evt_set->add_trace(trace, 0.0, this);
 233     }
 234     void Link::setLatencyTrace(tmgr_trace_t trace)
 235     {
 236       xbt_assert(m_latency.event==NULL,"Cannot set a second latency trace to Link %s", getName());
 237       m_latency.event = future_evt_set->add_trace(trace, 0.0, this);
 238     }
 239
 240
 241     /**********
 242      * Action *
 243      **********/
 244
 245     void NetworkAction::setState(Action::State state){
 246       Action::State old = getState();
 247       Action::setState(state);
 248       networkActionStateChangedCallbacks(this, old, state);
 249     }
 250
 251   }
 252 }
 253
 254 #endif /* NETWORK_INTERFACE_CPP_ */