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 SG_BEGIN_DECL()
  22 const char* sg_link_name(Link *link) {
  23   return link->getName();
  24 }
  25 Link * sg_link_by_name(const char* name) {
  26   return Link::byName(name);
  27 }
  28
  29 int sg_link_is_shared(Link *link){
  30   return link->sharingPolicy();
  31 }
  32 double sg_link_bandwidth(Link *link){
  33   return link->getBandwidth();
  34 }
  35 double sg_link_latency(Link *link){
  36   return link->getLatency();
  37 }
  38 void* sg_link_data(Link *link) {
  39         return link->getData();
  40 }
  41 void sg_link_data_set(Link *link,void *data) {
  42         link->setData(data);
  43 }
  44 int sg_link_amount(void) {
  45         return Link::linksAmount();
  46 }
  47 Link** sg_link_list(void) {
  48         return Link::linksList();
  49 }
  50 void sg_link_exit(void) {
  51         Link::linksExit();
  52 }
  53 SG_END_DECL()
  54 /*****************
  55  * List of links *
  56  *****************/
  57
  58 boost::unordered_map<std::string,Link *> *Link::links = new boost::unordered_map<std::string,Link *>();
  59 Link *Link::byName(const char* name) {
  60           Link * res = NULL;
  61           try {
  62                   res = links->at(name);
  63           } catch (std::out_of_range& e) {}
  64
  65           return res;
  66 }
  67 /** @brief Returns the amount of links in the platform */
  68 int Link::linksAmount() {
  69           return links->size();
  70 }
  71 /** @brief Returns a list of all existing links */
  72 Link **Link::linksList() {
  73           Link **res = xbt_new(Link*, (int)links->size());
  74           int i=0;
  75           for (auto kv : *links) {
  76                   res[i++] = kv.second;
  77           }
  78           return res;
  79 }
  80 /** @brief destructor of the static data */
  81 void Link::linksExit() {
  82         for (auto kv : *links)
  83                 delete (kv.second);
  84         delete links;
  85 }
  86 /*************
  87  * Callbacks *
  88  *************/
  89
  90 surf_callback(void, Link*) networkLinkCreatedCallbacks;
  91 surf_callback(void, Link*) networkLinkDestructedCallbacks;
  92 surf_callback(void, Link*, e_surf_resource_state_t, e_surf_resource_state_t) networkLinkStateChangedCallbacks;
  93 surf_callback(void, NetworkAction*, e_surf_action_state_t, e_surf_action_state_t) networkActionStateChangedCallbacks;
  94 surf_callback(void, NetworkAction*, RoutingEdge *src, RoutingEdge *dst, double size, double rate) networkCommunicateCallbacks;
  95
  96 void netlink_parse_init(sg_platf_link_cbarg_t link){
  97   if (link->policy == SURF_LINK_FULLDUPLEX) {
  98     char *link_id;
  99     link_id = bprintf("%s_UP", link->id);
 100     surf_network_model->createLink(link_id,
 101                       link->bandwidth,
 102                       link->bandwidth_trace,
 103                       link->latency,
 104                       link->latency_trace,
 105                       link->state,
 106                       link->state_trace, link->policy, link->properties);
 107     xbt_free(link_id);
 108     link_id = bprintf("%s_DOWN", link->id);
 109     surf_network_model->createLink(link_id,
 110                       link->bandwidth,
 111                       link->bandwidth_trace,
 112                       link->latency,
 113                       link->latency_trace,
 114                       link->state,
 115                       link->state_trace, link->policy, link->properties);
 116     xbt_free(link_id);
 117   } else {
 118           surf_network_model->createLink(link->id,
 119                           link->bandwidth,
 120                           link->bandwidth_trace,
 121                           link->latency,
 122                           link->latency_trace,
 123                           link->state,
 124                           link->state_trace, link->policy, link->properties);
 125   }
 126 }
 127
 128 void net_add_traces(){
 129   surf_network_model->addTraces();
 130 }
 131
 132 /*********
 133  * Model *
 134  *********/
 135
 136 NetworkModel *surf_network_model = NULL;
 137
 138 double NetworkModel::latencyFactor(double /*size*/) {
 139   return sg_latency_factor;
 140 }
 141
 142 double NetworkModel::bandwidthFactor(double /*size*/) {
 143   return sg_bandwidth_factor;
 144 }
 145
 146 double NetworkModel::bandwidthConstraint(double rate, double /*bound*/, double /*size*/) {
 147   return rate;
 148 }
 149
 150 double NetworkModel::shareResourcesFull(double now)
 151 {
 152   NetworkAction *action = NULL;
 153   ActionList *runningActions = surf_network_model->getRunningActionSet();
 154   double minRes;
 155
 156   minRes = shareResourcesMaxMin(runningActions, surf_network_model->p_maxminSystem, surf_network_model->f_networkSolve);
 157
 158   for(ActionList::iterator it(runningActions->begin()), itend(runningActions->end())
 159        ; it != itend ; ++it) {
 160       action = static_cast<NetworkAction*>(&*it);
 161 #ifdef HAVE_LATENCY_BOUND_TRACKING
 162     if (lmm_is_variable_limited_by_latency(action->getVariable())) {
 163       action->m_latencyLimited = 1;
 164     } else {
 165       action->m_latencyLimited = 0;
 166     }
 167 #endif
 168     if (action->m_latency > 0) {
 169       minRes = (minRes < 0) ? action->m_latency : std::min(minRes, action->m_latency);
 170     }
 171   }
 172
 173   XBT_DEBUG("Min of share resources %f", minRes);
 174
 175   return minRes;
 176 }
 177
 178 /************
 179  * Resource *
 180  ************/
 181
 182 Link::Link(NetworkModel *model, const char *name, xbt_dict_t props)
 183 : Resource(model, name, props)
 184 {
 185   links->insert({name, this});
 186
 187   XBT_DEBUG("Create link '%s'",name);
 188 }
 189
 190 Link::Link(NetworkModel *model, const char *name, xbt_dict_t props,
 191                                  lmm_constraint_t constraint,
 192                              tmgr_history_t history,
 193                              tmgr_trace_t state_trace)
 194 : Resource(model, name, props, constraint)
 195 {
 196   if (state_trace)
 197     p_stateEvent = tmgr_history_add_trace(history, state_trace, 0.0, 0, this);
 198
 199   links->insert({name, this});
 200   XBT_DEBUG("Create link '%s'",name);
 201
 202 }
 203
 204 Link::~Link()
 205 {
 206   surf_callback_emit(networkLinkDestructedCallbacks, this);
 207 }
 208
 209 bool Link::isUsed()
 210 {
 211   return lmm_constraint_used(getModel()->getMaxminSystem(), getConstraint());
 212 }
 213
 214 double Link::getLatency()
 215 {
 216   return m_latCurrent;
 217 }
 218
 219 double Link::getBandwidth()
 220 {
 221   return p_speed.peak * p_speed.scale;
 222 }
 223
 224 int Link::sharingPolicy()
 225 {
 226   return lmm_constraint_sharing_policy(getConstraint());
 227 }
 228
 229 void Link::setState(e_surf_resource_state_t state){
 230   e_surf_resource_state_t old = Resource::getState();
 231   Resource::setState(state);
 232   surf_callback_emit(networkLinkStateChangedCallbacks, this, old, state);
 233 }
 234
 235
 236
 237 /**********
 238  * Action *
 239  **********/
 240
 241 void NetworkAction::setState(e_surf_action_state_t state){
 242   e_surf_action_state_t old = getState();
 243   Action::setState(state);
 244   surf_callback_emit(networkActionStateChangedCallbacks, this, old, state);
 245 }
 246
 247 #endif /* NETWORK_INTERFACE_CPP_ */