1 /* Copyright (c) 2004-2015. The SimGrid Team.
2 * All rights reserved. */
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. */
7 #ifndef SURF_NETWORK_INTERFACE_HPP_
8 #define SURF_NETWORK_INTERFACE_HPP_
12 #include <boost/unordered_map.hpp>
16 #include "surf_interface.hpp"
17 #include "surf_routing.hpp"
18 #include "src/surf/PropertyHolder.hpp"
20 #include "simgrid/link.h"
37 /** @brief Callback signal fired when the state of a NetworkAction changes
38 * Signature: `void(NetworkAction *action, e_surf_action_state_t old, e_surf_action_state_t current)` */
39 XBT_PUBLIC_DATA(simgrid::xbt::signal<void(simgrid::surf::NetworkAction*, e_surf_action_state_t, e_surf_action_state_t)>) networkActionStateChangedCallbacks;
41 /** @brief Callback signal fired when a NetworkAction is created (when a communication starts)
42 * Signature: `void(NetworkAction *action, RoutingEdge *src, RoutingEdge *dst, double size, double rate)` */
43 XBT_PUBLIC_DATA(simgrid::xbt::signal<void(simgrid::surf::NetworkAction*, simgrid::surf::NetCard *src, simgrid::surf::NetCard *dst, double size, double rate)>) networkCommunicateCallbacks;
51 XBT_PUBLIC(void) netlink_parse_init(sg_platf_link_cbarg_t link);
60 /** @ingroup SURF_network_interface
61 * @brief SURF network model interface class
62 * @details A model is an object which handles the interactions between its Resources and its Actions
64 class NetworkModel : public Model {
66 /** @brief Constructor */
67 NetworkModel() : Model() { }
69 /** @brief Destructor */
72 lmm_system_free(p_maxminSystem);
74 xbt_heap_free(p_actionHeap);
80 * @brief Create a Link
82 * @param name The name of the Link
83 * @param bw_initial The initial bandwidth of the Link in bytes per second
84 * @param bw_trace The trace associated to the Link bandwidth
85 * @param lat_initial The initial latency of the Link in seconds
86 * @param lat_trace The trace associated to the Link latency
87 * @param policy The sharing policy of the Link
88 * @param properties Dictionary of properties associated to this Resource
89 * @return The created Link
91 virtual Link* createLink(const char *name,
93 tmgr_trace_t bw_trace,
95 tmgr_trace_t lat_trace,
96 e_surf_link_sharing_policy_t policy,
97 xbt_dict_t properties)=0;
100 * @brief Create a communication between two hosts.
101 * @details It makes calls to the routing part, and execute the communication
102 * between the two end points.
104 * @param src The source of the communication
105 * @param dst The destination of the communication
106 * @param size The size of the communication in bytes
107 * @param rate Allows to limit the transfer rate. Negative value means
109 * @return The action representing the communication
111 virtual Action *communicate(NetCard *src, NetCard *dst,
112 double size, double rate)=0;
114 /** @brief Function pointer to the function to use to solve the lmm_system_t
116 * @param system The lmm_system_t to solve
118 void (*f_networkSolve)(lmm_system_t) = lmm_solve;
121 * @brief Get the right multiplicative factor for the latency.
122 * @details Depending on the model, the effective latency when sending
123 * a message might be different from the theoretical latency of the link,
124 * in function of the message size. In order to account for this, this
125 * function gets this factor.
127 * @param size The size of the message.
128 * @return The latency factor.
130 virtual double latencyFactor(double size);
133 * @brief Get the right multiplicative factor for the bandwidth.
134 * @details Depending on the model, the effective bandwidth when sending
135 * a message might be different from the theoretical bandwidth of the link,
136 * in function of the message size. In order to account for this, this
137 * function gets this factor.
139 * @param size The size of the message.
140 * @return The bandwidth factor.
142 virtual double bandwidthFactor(double size);
145 * @brief Get definitive bandwidth.
146 * @details It gives the minimum bandwidth between the one that would
147 * occur if no limitation was enforced, and the one arbitrary limited.
148 * @param rate The desired maximum bandwidth.
149 * @param bound The bandwidth with only the network taken into account.
150 * @param size The size of the message.
151 * @return The new bandwidth.
153 virtual double bandwidthConstraint(double rate, double bound, double size);
154 double next_occuring_event_full(double now) override;
160 /** @ingroup SURF_network_interface
161 * @brief SURF network link interface class
162 * @details A Link represents the link between two [hosts](\ref Host)
165 public simgrid::surf::Resource,
166 public simgrid::surf::PropertyHolder {
169 * @brief Link constructor
171 * @param model The NetworkModel associated to this Link
172 * @param name The name of the Link
173 * @param props Dictionary of properties associated to this Link
175 Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props);
178 * @brief Link constructor
180 * @param model The NetworkModel associated to this Link
181 * @param name The name of the Link
182 * @param props Dictionary of properties associated to this Link
183 * @param constraint The lmm constraint associated to this Cpu if it is part of a LMM component
185 Link(simgrid::surf::NetworkModel *model, const char *name, xbt_dict_t props, lmm_constraint_t constraint);
187 /** @brief State traces are used to model the on/off state of the link */
188 void setStateTrace(tmgr_trace_t trace);
190 /* Link destruction logic */
191 /**************************/
195 void destroy(); // Must be called instead of the destructor
197 bool currentlyDestroying_ = false;
200 /** @brief Callback signal fired when a new Link is created.
201 * Signature: void(Link*) */
202 static simgrid::xbt::signal<void(simgrid::surf::Link*)> onCreation;
204 /** @brief Callback signal fired when a Link is destroyed.
205 * Signature: void(Link*) */
206 static simgrid::xbt::signal<void(simgrid::surf::Link*)> onDestruction;
208 /** @brief Callback signal fired when the state of a Link changes (when it is turned on or off)
209 * Signature: `void(Link*)` */
210 static simgrid::xbt::signal<void(simgrid::surf::Link*)> onStateChange;
213 /** @brief Get the bandwidth in bytes per second of current Link */
214 virtual double getBandwidth();
216 /** @brief Update the bandwidth in bytes per second of current Link */
217 virtual void updateBandwidth(double value)=0;
219 /** @brief Get the latency in seconds of current Link */
220 virtual double getLatency();
222 /** @brief Update the latency in seconds of current Link */
223 virtual void updateLatency(double value)=0;
225 /** @brief The sharing policy is a @{link e_surf_link_sharing_policy_t::EType} (0: FATPIPE, 1: SHARED, 2: FULLDUPLEX) */
226 virtual int sharingPolicy();
228 /** @brief Check if the Link is used */
229 bool isUsed() override;
231 void turnOn() override;
232 void turnOff() override;
234 virtual void set_state_trace(tmgr_trace_t trace); /*< setup the trace file with states events (ON or OFF). Trace must contain boolean values. */
235 virtual void set_bandwidth_trace(tmgr_trace_t trace); /*< setup the trace file with bandwidth events (peak speed changes due to external load). Trace must contain percentages (value between 0 and 1). */
236 virtual void set_latency_trace(tmgr_trace_t trace); /*< setup the trace file with latency events (peak latency changes due to external load). Trace must contain absolute values */
238 tmgr_trace_iterator_t m_stateEvent = NULL;
239 s_surf_metric_t m_latency = {1.0,0,NULL};
240 s_surf_metric_t m_bandwidth = {1.0,0,NULL};
244 void *getData() { return userData;}
245 void setData(void *d) { userData=d;}
247 void *userData = NULL;
249 /* List of all links */
251 static boost::unordered_map<std::string, Link *> *links;
253 static Link *byName(const char* name);
254 static int linksCount();
255 static Link **linksList();
256 static void linksExit();
262 /** @ingroup SURF_network_interface
263 * @brief SURF network action interface class
264 * @details A NetworkAction represents a communication between two [hosts](\ref Host)
266 class NetworkAction : public simgrid::surf::Action {
268 /** @brief Constructor
270 * @param model The NetworkModel associated to this NetworkAction
271 * @param cost The cost of this NetworkAction in [TODO]
272 * @param failed [description]
274 NetworkAction(simgrid::surf::Model *model, double cost, bool failed)
275 : simgrid::surf::Action(model, cost, failed) {}
278 * @brief NetworkAction constructor
280 * @param model The NetworkModel associated to this NetworkAction
281 * @param cost The cost of this NetworkAction in [TODO]
282 * @param failed [description]
283 * @param var The lmm variable associated to this Action if it is part of a
286 NetworkAction(simgrid::surf::Model *model, double cost, bool failed, lmm_variable_t var)
287 : simgrid::surf::Action(model, cost, failed, var) {};
289 void setState(e_surf_action_state_t state);
295 const char* p_senderLinkName;
297 xbt_fifo_item_t p_senderFifoItem;
302 #endif /* SURF_NETWORK_INTERFACE_HPP_ */