2 /* Copyright (c) 2007 Kayo Fujiwara. 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 #include "gtnets_simulator.h"
8 #include "gtnets_topology.h"
15 #include "xbt/asserts.h"
16 #include "RngStream.h"
18 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_gtnets_simulator, surf_network_gtnets,
19 "Logging specific to the SURF network GTNetS simulator");
24 static vector<void*> meta_flows;
25 static int* meta_nflow;
26 static int meta_flg = 0;
29 void static tcp_sent_callback(void* action, double completion_time);
32 // TODO: check the default values.
40 // EXTRACTED FROM GTNETS SOURCE CODE COMMENTS
41 // REDQueue::REDQueue(
42 // DCount_t in_w_q, Count_t in_min_th, Count_t in_max_th,
43 // Count_t in_limit, DCount_t in_max_p, Count_t in_mean_pktsize) : iface(nil)
44 // Set default values.
45 //Doc:Desc This constructor the critical RED parameters and builds a
46 //Doc:Desc correspoding RED queue
47 //Doc:Arg1 weight of the queue
48 //Doc:Arg2 minimum threshold
49 //Doc:Arg3 maximum threshold
50 //Doc:Arg4 Limit/max size for the queue
51 //Doc:Arg5 maximum value for mark/drop probability
52 //Doc:Arg6 Average packet size
55 //REDQueue *default_red_queue_ = new REDQueue(0.002, 2500, 7500, 30000, 0.10, 500);
57 //REDQueue *default_red_queue_ = new REDQueue();
59 //See for details of how those values are calucated below
60 //[1] Sally Floyd and Van Jacobson, "Random Early Detection Gateways with Congestion Avoidance",
61 // IEEE/ACM Transactions on Networking, vol. 1, n. 4, august 1993.
63 //[2] Kostas Pentikousis, "Active Queue Management", ACM Crossroads, vol. 7, n. 5,
66 //[3] Stefann De Cnodder, Omar Ecoumi, Kenny Paulwels, "RED behavior with different packet sizes",
67 // 5th IEEE Symposium on Computers and Communication, (ISCC 2000)
69 //[4] http://www.opalsoft.net/qos/DS-26.htm
72 // q_weight = fixed to 0.002 in most literature
73 // min_bytes = max / 3 = 16,666,666
74 // max_bytes = mean_bw * max_tolerable_latency, set to 1e8 * 0.5 = 50,000,000
75 // limit_bytes = 8 * max = 400,000,000
76 // prob = follow most literature 0.02
77 // avgpkt = fixed to the same TCP segment size, 1000 Bytes
79 // burst = (2*(min+max))/(3*avgpkt) ***DON'T USED BY GTNetS***
80 REDQueue *default_red_queue_ = new REDQueue(0.002, 16666666, 50000000, 400000000, 0.02, 1000);
82 Queue::Default(*default_red_queue_);
83 delete default_red_queue_;
85 TCP::DefaultAdvWin(wsize);
86 TCP::DefaultSegSize(1000);
87 TCP::DefaultTxBuffer(128000);
88 TCP::DefaultRxBuffer(128000);
90 sim_ = new Simulator();
92 topo_ = new GTNETS_Topology();
95 rm_ = new RoutingManual();
96 Routing::SetRouting(rm_);
101 map<int, Linkp2p*>::iterator it;
102 for (it = gtnets_links_.begin(); it != gtnets_links_.end(); it++){
105 while (!gtnets_links_.empty())
106 gtnets_links_.erase(gtnets_links_.begin());
108 map<int, Uniform*>::iterator it2;
109 for (it2 = uniform_jitter_generator_.begin(); it2 != uniform_jitter_generator_.end(); it2++){
112 while (!uniform_jitter_generator_.empty())
113 uniform_jitter_generator_.erase(uniform_jitter_generator_.begin());
115 map<int, Node*>::iterator it3;
116 for (it3 = gtnets_nodes_.begin(); it3 != gtnets_nodes_.end(); it3++){
119 while (!gtnets_nodes_.empty())
120 gtnets_nodes_.erase(gtnets_nodes_.begin());
122 map<int, TCPServer*>::iterator it4;
123 for (it4 = gtnets_servers_.begin(); it4 != gtnets_servers_.end(); it4++){
126 while (!gtnets_servers_.empty())
127 gtnets_servers_.erase(gtnets_servers_.begin());
129 map<int, TCPSend*>::iterator it5;
130 for (it5 = gtnets_clients_.begin(); it5 != gtnets_clients_.end(); it5++){
133 while (!gtnets_clients_.empty())
134 gtnets_clients_.erase(gtnets_clients_.begin());
145 int GTSim::add_router(int id){
146 xbt_assert1(!(topo_->add_router(id) < 0), "can't add router %d. already exists", id);
149 //bandwidth: in bytes.
150 //latency: in seconds.
151 int GTSim::add_link(int id, double bandwidth, double latency){
152 double bw = bandwidth * 8; //Bandwidth in bits (used in GTNETS).
153 xbt_assert1(!(topo_->add_link(id) < 0),"Can't add link %d. already exists", id);
154 DEBUG3("Creating a new P2P, linkid %d, bandwidth %gl, latency %gl", id, bandwidth, latency);
155 gtnets_links_[id] = new Linkp2p(bw, latency);
157 DEBUG2("Using jitter %f, and seed %u", jitter_, jitter_seed_);
158 double min = -1*jitter_*latency;
159 double max = jitter_*latency;
160 uniform_jitter_generator_[id] = new Uniform(min,max);
161 gtnets_links_[id]->Jitter((const Random &) *(uniform_jitter_generator_[id]));
166 // if gtnets_nodes_ includes id, return true, otherwise return false.
167 bool GTSim::node_include(int id){
168 if (gtnets_nodes_.find(id) != gtnets_nodes_.end()) return true;
172 // if gtnets_link_ includes id, return true, otherwise return false.
173 bool GTSim::link_include(int id){
174 if (gtnets_links_.find(id) != gtnets_links_.end()) return true;
178 int GTSim::add_onehop_route(int src, int dst, int link){
179 xbt_assert3(!(topo_->add_onehop_route(src, dst, link) < 0), "Cannot add a route, src: %d, dst: %d, link: %d", src, dst, link);
183 // Generate the gtnets nodes according to topo_.
184 void GTSim::add_nodes(){
185 static unsigned int address = IPAddr("192.168.0.1");
186 IPAddr helper = IPAddr();
187 vector<GTNETS_Node*> nodes = topo_->nodes();
188 vector<GTNETS_Node*>::iterator it;
190 for (it = nodes.begin(); it != nodes.end(); it++){
192 gtnets_nodes_[id] = new Node();
193 gtnets_nodes_[id]->SetIPAddr(address++);
194 DEBUG2("In GTSim, add_node: %d, with IPAddr %s", id, helper.ToDotted(address-1));
199 void GTSim::node_connect(){
201 map<int, GTNETS_Link*> links = topo_->links();
202 map<int, GTNETS_Link*>::iterator it;
203 int linkid, srcid, dstid;
204 for (it = links.begin(); it != links.end(); it++){
205 linkid = it->second->id();
206 //if link is used in a route, connect the two nodes.
207 if (it->second->src_node() && it->second->dst_node()){
209 srcid = it->second->src_node()->id();
210 dstid = it->second->dst_node()->id();
212 gtnets_nodes_[srcid]->
213 AddDuplexLink(gtnets_nodes_[dstid], *(gtnets_links_[linkid]));
214 DEBUG3("Setting DuplexLink, src %d, dst %d, linkid %d", srcid, dstid, linkid);
219 // Create nodes and routes from the temporary topology, GTNETS_Topolgy.
220 void GTSim::create_gtnets_topology(){
225 void GTSim::print_topology(){
226 topo_->print_topology();
229 // Add a route that includes more than one hop. All one hop
230 // routes must have been added. When this function is called
231 // for the first time, all gtnets nodes are generated.
232 int GTSim::add_route(int src, int dst, int* links, int nlink){
233 if (is_topology_ == 0){
234 create_gtnets_topology();
238 IPAddr_t mymask = IPAddr("255.255.255.255");
240 int src_node = topo_->nodeid_from_hostid(src);
241 int dst_node = topo_->nodeid_from_hostid(dst);
243 xbt_assert1(!(gtnets_nodes_.find(src_node) == gtnets_nodes_.end()), "Node %d not found", src_node);
244 xbt_assert1(!(gtnets_nodes_.find(dst_node) == gtnets_nodes_.end()), "Node %d not found", dst_node);
246 Node* tmpsrc = gtnets_nodes_[src_node];
247 Node* tmpdst = gtnets_nodes_[dst_node];
249 int next_node, cur_node;
252 for (int i = 0; i < nlink; i++){
253 xbt_assert1(!(gtnets_nodes_.find(cur_node) == gtnets_nodes_.end()), "Node %d not found", cur_node);
254 next_node = topo_->peer_node_id(links[i], cur_node);
255 xbt_assert0(!(next_node < 0), "Peer node not found");
256 xbt_assert1(!(gtnets_nodes_.find(next_node) == gtnets_nodes_.end()), "Node %d not found", next_node);
259 Node* tmpcur = gtnets_nodes_[cur_node];
260 Node* tmpnext = gtnets_nodes_[next_node];
262 tmpcur->AddRoute(tmpdst->GetIPAddr(),
264 tmpcur->GetIfByNode(tmpnext),
265 tmpnext->GetIPAddr());
267 tmpnext->AddRoute(tmpsrc->GetIPAddr(),
269 tmpnext->GetIfByNode(tmpcur),
270 tmpcur->GetIPAddr());
272 cur_node = next_node;
275 xbt_assert2(!(cur_node != dst_node), "Route inconsistency, last: %d, dst: %d",cur_node, dst_node);
282 int GTSim::create_flow(int src, int dst, long datasize, void* metadata){
283 //if no route with more than one links, topology has not been generated.
285 if (is_topology_ == 0){
286 create_gtnets_topology();
290 int src_node = topo_->nodeid_from_hostid(src);
291 xbt_assert1(!(src_node < 0), "Src %d not found", src_node);
293 int dst_node = topo_->nodeid_from_hostid(dst);
294 xbt_assert1(!(dst_node < 0), "Dst %d not found", dst_node);
296 gtnets_servers_[nflow_] = (TCPServer*) gtnets_nodes_[dst_node]->
297 AddApplication(TCPServer(TCPReno()));
298 gtnets_servers_[nflow_]->BindAndListen(1000+nflow_);
300 gtnets_clients_[nflow_] = (TCPSend*)gtnets_nodes_[src_node]->
301 AddApplication(TCPSend(metadata, gtnets_nodes_[dst_node]->GetIPAddr(),
302 1000+nflow_, Constant(datasize), TCPReno()));
303 gtnets_clients_[nflow_]->SetSendCallBack(tcp_sent_callback);
304 gtnets_clients_[nflow_]->Start(0);
306 gtnets_action_to_flow_[metadata] = nflow_;
312 Time_t GTSim::get_time_to_next_flow_completion(){
319 //remain needs to be updated in the future
326 if ( (soon_pid=fork()) != 0){
327 read(pfds[0], &t1, sizeof(Time_t));
328 waitpid(soon_pid, &status, 0);
331 t = sim_->RunUntilNextCompletion();
332 write(pfds[1], (const void*)&t, sizeof(Time_t));
339 double GTSim::gtnets_get_flow_rx(void *metadata){
340 int flow_id = gtnets_action_to_flow_[metadata];
341 return gtnets_servers_[flow_id]->GetTotRx();
345 int GTSim::run_until_next_flow_completion(void ***metadata, int *number_of_flows){
348 meta_nflow = number_of_flows;
351 Time_t t1 = sim_->RunUntilNextCompletion();
353 *metadata = (meta_flows.empty() ? NULL : &meta_flows[0]);
357 int GTSim::run(double delta){
363 void GTSim::set_jitter(double d){
364 xbt_assert1(((0 <= d)&&(d <= 1)), "The jitter value must be within interval [0.0;1.0), got %f", d);
368 void GTSim::set_jitter_seed(int s){
371 if(jitter_seed_ > 0.0){
372 INFO1("Setting the jitter_seed with %d", jitter_seed_ );
373 Random::GlobalSeed(jitter_seed_ , jitter_seed_ , jitter_seed_ ,jitter_seed_ ,jitter_seed_ ,jitter_seed_);
377 void static tcp_sent_callback(void* action, double completion_time){
378 // Schedule the flow complete event.
380 new SimulatorEvent(SimulatorEvent::FLOW_COMPLETE);
381 Simulator::instance->Schedule(e, 0, Simulator::instance);
384 meta_flows.push_back(action);