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*, e_surf_action_state_t, e_surf_action_state_t)> 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   if (link->policy == SURF_LINK_FULLDUPLEX) {
 106     char *link_id;
 107     link_id = bprintf("%s_UP", link->id);
 108     Link *l = surf_network_model->createLink(link_id, link->bandwidth, link->latency,
 109         link->policy, link->properties);
 110     if (link->latency_trace)
 111       l->setLatencyTrace(link->latency_trace);
 112     if (link->bandwidth_trace)
 113       l->setBandwidthTrace(link->bandwidth_trace);
 114     if (link->state_trace)
 115       l->setStateTrace(link->state_trace);
 116
 117     xbt_free(link_id);
 118     link_id = bprintf("%s_DOWN", link->id);
 119     l = surf_network_model->createLink(link_id, link->bandwidth, link->latency,
 120         link->policy, link->properties);
 121     if (link->latency_trace)
 122       l->setLatencyTrace(link->latency_trace);
 123     if (link->bandwidth_trace)
 124       l->setBandwidthTrace(link->bandwidth_trace);
 125     if (link->state_trace)
 126       l->setStateTrace(link->state_trace);
 127     xbt_free(link_id);
 128   } else {
 129     Link *l=surf_network_model->createLink(link->id, link->bandwidth, link->latency,
 130         link->policy, link->properties);
 131     if (link->latency_trace)
 132       l->setLatencyTrace(link->latency_trace);
 133     if (link->bandwidth_trace)
 134       l->setBandwidthTrace(link->bandwidth_trace);
 135     if (link->state_trace)
 136       l->setStateTrace(link->state_trace);
 137   }
 138 }
 139
 140 /*********
 141  * Model *
 142  *********/
 143
 144 simgrid::surf::NetworkModel *surf_network_model = NULL;
 145
 146 namespace simgrid {
 147   namespace surf {
 148
 149     double NetworkModel::latencyFactor(double /*size*/) {
 150       return sg_latency_factor;
 151     }
 152
 153     double NetworkModel::bandwidthFactor(double /*size*/) {
 154       return sg_bandwidth_factor;
 155     }
 156
 157     double NetworkModel::bandwidthConstraint(double rate, double /*bound*/, double /*size*/) {
 158       return rate;
 159     }
 160
 161     double NetworkModel::next_occuring_event_full(double now)
 162     {
 163       NetworkAction *action = NULL;
 164       ActionList *runningActions = surf_network_model->getRunningActionSet();
 165       double minRes;
 166
 167       minRes = shareResourcesMaxMin(runningActions, surf_network_model->maxminSystem_, surf_network_model->f_networkSolve);
 168
 169       for(ActionList::iterator it(runningActions->begin()), itend(runningActions->end())
 170           ; it != itend ; ++it) {
 171         action = static_cast<NetworkAction*>(&*it);
 172         if (action->m_latency > 0) {
 173           minRes = (minRes < 0) ? action->m_latency : std::min(minRes, action->m_latency);
 174         }
 175       }
 176
 177       XBT_DEBUG("Min of share resources %f", minRes);
 178
 179       return minRes;
 180     }
 181
 182     /************
 183      * Resource *
 184      ************/
 185
 186     Link::Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props)
 187     : Resource(model, name),
 188       PropertyHolder(props)
 189     {
 190       links->insert({name, this});
 191
 192       m_latency.scale = 1;
 193       m_bandwidth.scale = 1;
 194       XBT_DEBUG("Create link '%s'",name);
 195     }
 196
 197     Link::Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props, lmm_constraint_t constraint)
 198     : Resource(model, name, constraint),
 199       PropertyHolder(props)
 200     {
 201       m_latency.scale = 1;
 202       m_bandwidth.scale = 1;
 203
 204       links->insert({name, this});
 205       XBT_DEBUG("Create link '%s'",name);
 206
 207     }
 208
 209     /** @brief use destroy() instead of this destructor */
 210     Link::~Link() {
 211       xbt_assert(currentlyDestroying_, "Don't delete Links directly. Call destroy() instead.");
 212     }
 213     /** @brief Fire the require callbacks and destroy the object
 214      *
 215      * Don't delete directly an Link, call l->destroy() instead.
 216      */
 217     void Link::destroy()
 218     {
 219       if (!currentlyDestroying_) {
 220         currentlyDestroying_ = true;
 221         onDestruction(this);
 222         delete this;
 223       }
 224     }
 225
 226     bool Link::isUsed()
 227     {
 228       return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 229     }
 230
 231     double Link::getLatency()
 232     {
 233       return m_latency.peak * m_latency.scale;
 234     }
 235
 236     double Link::getBandwidth()
 237     {
 238       return m_bandwidth.peak * m_bandwidth.scale;
 239     }
 240
 241     int Link::sharingPolicy()
 242     {
 243       return lmm_constraint_sharing_policy(getConstraint());
 244     }
 245
 246     void Link::turnOn(){
 247       if (isOff()) {
 248         Resource::turnOn();
 249         onStateChange(this);
 250       }
 251     }
 252     void Link::turnOff(){
 253       if (isOn()) {
 254         Resource::turnOff();
 255         onStateChange(this);
 256       }
 257     }
 258     void Link::setStateTrace(tmgr_trace_t trace) {
 259       xbt_assert(m_stateEvent==NULL,"Cannot set a second state trace to Link %s", getName());
 260       m_stateEvent = future_evt_set->add_trace(trace, 0.0, this);
 261     }
 262     void Link::setBandwidthTrace(tmgr_trace_t trace)
 263     {
 264       xbt_assert(m_bandwidth.event==NULL,"Cannot set a second bandwidth trace to Link %s", getName());
 265       m_bandwidth.event = future_evt_set->add_trace(trace, 0.0, this);
 266     }
 267     void Link::setLatencyTrace(tmgr_trace_t trace)
 268     {
 269       xbt_assert(m_latency.event==NULL,"Cannot set a second latency trace to Link %s", getName());
 270       m_latency.event = future_evt_set->add_trace(trace, 0.0, this);
 271     }
 272
 273
 274     /**********
 275      * Action *
 276      **********/
 277
 278     void NetworkAction::setState(e_surf_action_state_t state){
 279       e_surf_action_state_t old = getState();
 280       Action::setState(state);
 281       networkActionStateChangedCallbacks(this, old, state);
 282     }
 283
 284   }
 285 }
 286
 287 #endif /* NETWORK_INTERFACE_CPP_ */