-/* Copyright (c) 2007-2011, 2014. The SimGrid Team.
- * All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-#include "gtnets_simulator.h"
-#include "gtnets_topology.h"
-#include <map>
-#include <vector>
-#ifdef XBT_DEBUG
- #undef XBT_DEBUG
-#endif
-#include "xbt/log.h"
-#include "xbt/asserts.h"
-#include "RngStream.h"
-#include <unistd.h> /* pipe */
-
-XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_gtnets_simulator, surf_network_gtnets,
- "Logging specific to the SURF network GTNetS simulator");
-
-
-using namespace std;
-
-static vector<void*> meta_flows;
-static int* meta_nflow;
-static int meta_flg = 0;
-
-
-void static tcp_sent_callback(void* action, double completion_time);
-
-
-// Constructor.
-// TODO: check the default values.
-GTSim::GTSim(int WindowSize){
- int wsize = WindowSize;
- is_topology_ = 0;
- nflow_ = 0;
- jitter_ = 0;
- jitter_seed_ = 10;
-
- // EXTRACTED FROM GTNETS SOURCE CODE COMMENTS
- // REDQueue::REDQueue(
- // DCount_t in_w_q, Count_t in_min_th, Count_t in_max_th,
- // Count_t in_limit, DCount_t in_max_p, Count_t in_mean_pktsize) : iface(nil)
- // Set default values.
- //Doc:Desc This constructor the critical RED parameters and builds a
- //Doc:Desc correspoding RED queue
- //Doc:Arg1 weight of the queue
- //Doc:Arg2 minimum threshold
- //Doc:Arg3 maximum threshold
- //Doc:Arg4 Limit/max size for the queue
- //Doc:Arg5 maximum value for mark/drop probability
- //Doc:Arg6 Average packet size
-
- //Default Parameters
- //REDQueue *default_red_queue_ = new REDQueue(0.002, 2500, 7500, 30000, 0.10, 500);
- //Same as above
- //REDQueue *default_red_queue_ = new REDQueue();
-
- //See for details of how those values are calucated below
- //[1] Sally Floyd and Van Jacobson, "Random Early Detection Gateways with Congestion Avoidance",
- // IEEE/ACM Transactions on Networking, vol. 1, n. 4, august 1993.
- //
- //[2] Kostas Pentikousis, "Active Queue Management", ACM Crossroads, vol. 7, n. 5,
- // mid-summer 2001
- //
- //[3] Stefann De Cnodder, Omar Ecoumi, Kenny Paulwels, "RED behavior with different packet sizes",
- // 5th IEEE Symposium on Computers and Communication, (ISCC 2000)
- //
- //[4] http://www.opalsoft.net/qos/DS-26.htm
- //
- //short explanation:
- // q_weight = fixed to 0.002 in most literature
- // min_bytes = max / 3 = 16,666,666
- // max_bytes = mean_bw * max_tolerable_latency, set to 1e8 * 0.5 = 50,000,000
- // limit_bytes = 8 * max = 400,000,000
- // prob = follow most literature 0.02
- // avgpkt = fixed to the same TCP segment size, 1000 Bytes
- //
- // burst = (2*(min+max))/(3*avgpkt) ***DON'T USED BY GTNetS***
- REDQueue *default_red_queue_ = new REDQueue(0.002, 16666666, 50000000, 400000000, 0.02, 1000);
-
- Queue::Default(*default_red_queue_);
- delete default_red_queue_;
-
- TCP::DefaultAdvWin(wsize);
- TCP::DefaultSegSize(1000);
- TCP::DefaultTxBuffer(128000);
- TCP::DefaultRxBuffer(128000);
-
- sim_ = new Simulator();
- sim_->verbose=false;
- topo_ = new GTNETS_Topology();
-
- // Manual routing
- rm_ = new RoutingManual();
- Routing::SetRouting(rm_);
-}
-
-// Constructor.
-// TODO: check the default values.
-GTSim::GTSim(){
- int wsize = 20000;
- is_topology_ = 0;
- nflow_ = 0;
- jitter_ = 0;
- jitter_seed_ = 10;
-
- // EXTRACTED FROM GTNETS SOURCE CODE COMMENTS
- // REDQueue::REDQueue(
- // DCount_t in_w_q, Count_t in_min_th, Count_t in_max_th,
- // Count_t in_limit, DCount_t in_max_p, Count_t in_mean_pktsize) : iface(nil)
- // Set default values.
- //Doc:Desc This constructor the critical RED parameters and builds a
- //Doc:Desc correspoding RED queue
- //Doc:Arg1 weight of the queue
- //Doc:Arg2 minimum threshold
- //Doc:Arg3 maximum threshold
- //Doc:Arg4 Limit/max size for the queue
- //Doc:Arg5 maximum value for mark/drop probability
- //Doc:Arg6 Average packet size
-
- //Default Parameters
- //REDQueue *default_red_queue_ = new REDQueue(0.002, 2500, 7500, 30000, 0.10, 500);
- //Same as above
- //REDQueue *default_red_queue_ = new REDQueue();
-
- //See for details of how those values are calucated below
- //[1] Sally Floyd and Van Jacobson, "Random Early Detection Gateways with Congestion Avoidance",
- // IEEE/ACM Transactions on Networking, vol. 1, n. 4, august 1993.
- //
- //[2] Kostas Pentikousis, "Active Queue Management", ACM Crossroads, vol. 7, n. 5,
- // mid-summer 2001
- //
- //[3] Stefann De Cnodder, Omar Ecoumi, Kenny Paulwels, "RED behavior with different packet sizes",
- // 5th IEEE Symposium on Computers and Communication, (ISCC 2000)
- //
- //[4] http://www.opalsoft.net/qos/DS-26.htm
- //
- //short explanation:
- // q_weight = fixed to 0.002 in most literature
- // min_bytes = max / 3 = 16,666,666
- // max_bytes = mean_bw * max_tolerable_latency, set to 1e8 * 0.5 = 50,000,000
- // limit_bytes = 8 * max = 400,000,000
- // prob = follow most literature 0.02
- // avgpkt = fixed to the same TCP segment size, 1000 Bytes
- //
- // burst = (2*(min+max))/(3*avgpkt) ***DON'T USED BY GTNetS***
- REDQueue *default_red_queue_ = new REDQueue(0.002, 16666666, 50000000, 400000000, 0.02, 1000);
-
- Queue::Default(*default_red_queue_);
- delete default_red_queue_;
-
- TCP::DefaultAdvWin(wsize);
- TCP::DefaultSegSize(1000);
- TCP::DefaultTxBuffer(128000);
- TCP::DefaultRxBuffer(128000);
-
- sim_ = new Simulator();
- sim_->verbose=false;
- topo_ = new GTNETS_Topology();
-
- // Manual routing
- rm_ = new RoutingManual();
- Routing::SetRouting(rm_);
-}
-
-GTSim::~GTSim(){
-
- map<int, Linkp2p*>::iterator it;
- for (it = gtnets_links_.begin(); it != gtnets_links_.end(); it++){
- delete it->second;
- }
- while (!gtnets_links_.empty())
- gtnets_links_.erase(gtnets_links_.begin());
-
- map<int, Uniform*>::iterator it2;
- for (it2 = uniform_jitter_generator_.begin(); it2 != uniform_jitter_generator_.end(); it2++){
- delete it2->second;
- }
- while (!uniform_jitter_generator_.empty())
- uniform_jitter_generator_.erase(uniform_jitter_generator_.begin());
-
- map<int, Node*>::iterator it3;
- for (it3 = gtnets_nodes_.begin(); it3 != gtnets_nodes_.end(); it3++){
- delete it3->second;
- }
- while (!gtnets_nodes_.empty())
- gtnets_nodes_.erase(gtnets_nodes_.begin());
-
- map<int, TCPServer*>::iterator it4;
- for (it4 = gtnets_servers_.begin(); it4 != gtnets_servers_.end(); it4++){
- delete it4->second;
- }
- while (!gtnets_servers_.empty())
- gtnets_servers_.erase(gtnets_servers_.begin());
-
- map<int, TCPSend*>::iterator it5;
- for (it5 = gtnets_clients_.begin(); it5 != gtnets_clients_.end(); it5++){
- delete it5->second;
- }
- while (!gtnets_clients_.empty())
- gtnets_clients_.erase(gtnets_clients_.begin());
-
- is_topology_ = 0;
- delete sim_;
- delete topo_;
- delete rm_;
- sim_ = 0;
- topo_ = 0;
- rm_ = 0;
-}
-
-int GTSim::add_router(int id){
- xbt_assert(!(topo_->add_router(id) < 0), "can't add router %d. already exists", id);
-}
-
-//bandwidth: in bytes.
-//latency: in seconds.
-int GTSim::add_link(int id, double bandwidth, double latency){
- double bw = bandwidth * 8; //Bandwidth in bits (used in GTNETS).
- xbt_assert(!(topo_->add_link(id) < 0),"Can't add link %d. already exists", id);
- XBT_DEBUG("Creating a new P2P, linkid %d, bandwidth %gl, latency %gl", id, bandwidth, latency);
- gtnets_links_[id] = new Linkp2p(bw, latency);
- if(jitter_ > 0){
- XBT_DEBUG("Using jitter %f, and seed %u", jitter_, jitter_seed_);
- double min = -1*jitter_*latency;
- double max = jitter_*latency;
- uniform_jitter_generator_[id] = new Uniform(min,max);
- gtnets_links_[id]->Jitter((const Random &) *(uniform_jitter_generator_[id]));
- }
- return 0;
-}
-
-// if gtnets_nodes_ includes id, return true, otherwise return false.
-bool GTSim::node_include(int id){
- if (gtnets_nodes_.find(id) != gtnets_nodes_.end()) return true;
- else return false;
-}
-
-// if gtnets_link_ includes id, return true, otherwise return false.
-bool GTSim::link_include(int id){
- if (gtnets_links_.find(id) != gtnets_links_.end()) return true;
- else return false;
-}
-
-int GTSim::add_onehop_route(int src, int dst, int link){
- xbt_assert(!(topo_->add_onehop_route(src, dst, link) < 0), "Cannot add a route, src: %d, dst: %d, link: %d", src, dst, link);
- return 0;
-}
-
-// Generate the gtnets nodes according to topo_.
-void GTSim::add_nodes(){
- static unsigned int address = IPAddr("192.168.0.1");
- IPAddr helper = IPAddr();
- vector<GTNETS_Node*> nodes = topo_->nodes();
- vector<GTNETS_Node*>::iterator it;
- int id;
- for (it = nodes.begin(); it != nodes.end(); it++){
- id = (*it)->id();
- gtnets_nodes_[id] = new Node();
- gtnets_nodes_[id]->SetIPAddr(address++);
- XBT_DEBUG("In GTSim, add_node: %d, with IPAddr %s", id, helper.ToDotted(address-1));
-
- }
-}
-
-void GTSim::node_connect(){
-
- map<int, GTNETS_Link*> links = topo_->links();
- map<int, GTNETS_Link*>::iterator it;
- int linkid, srcid, dstid;
- for (it = links.begin(); it != links.end(); it++){
- linkid = it->second->id();
- //if link is used in a route, connect the two nodes.
- if (it->second->src_node() && it->second->dst_node()){
-
- srcid = it->second->src_node()->id();
- dstid = it->second->dst_node()->id();
-
- gtnets_nodes_[srcid]->
- AddDuplexLink(gtnets_nodes_[dstid], *(gtnets_links_[linkid]));
- XBT_DEBUG("Setting DuplexLink, src %d, dst %d, linkid %d", srcid, dstid, linkid);
- }
- }
-}
-
-// Create nodes and routes from the temporary topology, GTNETS_Topolgy.
-void GTSim::create_gtnets_topology(){
- add_nodes();
- node_connect();
-}
-
-void GTSim::print_topology(){
- topo_->print_topology();
-}
-
-// Add a route that includes more than one hop. All one hop
-// routes must have been added. When this function is called
-// for the first time, all gtnets nodes are generated.
-int GTSim::add_route(int src, int dst, int* links, int nlink){
- if (is_topology_ == 0){
- create_gtnets_topology();
- is_topology_ = 1;
- }
-
- IPAddr_t mymask = IPAddr("255.255.255.255");
-
- int src_node = topo_->nodeid_from_hostid(src);
- int dst_node = topo_->nodeid_from_hostid(dst);
-
- xbt_assert(!(gtnets_nodes_.find(src_node) == gtnets_nodes_.end()), "Node %d not found", src_node);
- xbt_assert(!(gtnets_nodes_.find(dst_node) == gtnets_nodes_.end()), "Node %d not found", dst_node);
-
- Node* tmpsrc = gtnets_nodes_[src_node];
- Node* tmpdst = gtnets_nodes_[dst_node];
-
- int next_node, cur_node;
-
- cur_node = src_node;
- for (int i = 0; i < nlink; i++){
- xbt_assert(!(gtnets_nodes_.find(cur_node) == gtnets_nodes_.end()), "Node %d not found", cur_node);
- next_node = topo_->peer_node_id(links[i], cur_node);
- xbt_assert(!(next_node < 0), "Peer node not found");
- xbt_assert(!(gtnets_nodes_.find(next_node) == gtnets_nodes_.end()), "Node %d not found", next_node);
-
- //add route
- Node* tmpcur = gtnets_nodes_[cur_node];
- Node* tmpnext = gtnets_nodes_[next_node];
-
- tmpcur->AddRoute(tmpdst->GetIPAddr(),
- mymask,
- tmpcur->GetIfByNode(tmpnext),
- tmpnext->GetIPAddr());
-
- tmpnext->AddRoute(tmpsrc->GetIPAddr(),
- mymask,
- tmpnext->GetIfByNode(tmpcur),
- tmpcur->GetIPAddr());
-
- cur_node = next_node;
- }
-
- xbt_assert(!(cur_node != dst_node), "Route inconsistency, last: %d, dst: %d",cur_node, dst_node);
-
- return 0;
-}
-
-
-
-int GTSim::create_flow(int src, int dst, long datasize, void* metadata){
- //if no route with more than one links, topology has not been generated.
- //generate it here.
- if (is_topology_ == 0){
- create_gtnets_topology();
- is_topology_ = 1;
- }
-
- int src_node = topo_->nodeid_from_hostid(src);
- xbt_assert(!(src_node < 0), "Src %d not found", src_node);
-
- int dst_node = topo_->nodeid_from_hostid(dst);
- xbt_assert(!(dst_node < 0), "Dst %d not found", dst_node);
-
- gtnets_servers_[nflow_] = (TCPServer*) gtnets_nodes_[dst_node]->
- AddApplication(TCPServer(TCPReno()));
- gtnets_servers_[nflow_]->BindAndListen(1000+nflow_);
-
- gtnets_clients_[nflow_] = (TCPSend*)gtnets_nodes_[src_node]->
- AddApplication(TCPSend(metadata, gtnets_nodes_[dst_node]->GetIPAddr(),
- 1000+nflow_, Constant(datasize), TCPReno()));
- gtnets_clients_[nflow_]->SetSendCallBack(tcp_sent_callback);
- gtnets_clients_[nflow_]->Start(0);
-
- gtnets_action_to_flow_[metadata] = nflow_;
- nflow_++;
-
- return 0;
-}
-
-Time_t GTSim::get_time_to_next_flow_completion(){
- int status;
- Time_t t1;
- int pfds[2];
- int soon_pid=-1;
- meta_flg=0;
-
- //remain needs to be updated in the future
- Count_t remain;
-
- pipe(pfds);
-
- t1 = 0;
- fflush (NULL);
- if( (soon_pid=fork()) != 0){
- read(pfds[0], &t1, sizeof(Time_t));
- waitpid(soon_pid, &status, 0);
- }else{
- Time_t t;
- t = sim_->RunUntilNextCompletion();
- write(pfds[1], (const void*)&t, sizeof(Time_t));
- exit(0);
- }
-
- return t1;
-}
-
-double GTSim::gtnets_get_flow_rx(void *metadata){
- int flow_id = gtnets_action_to_flow_[metadata];
- return gtnets_servers_[flow_id]->GetTotRx();
-}
-
-
-int GTSim::run_until_next_flow_completion(void ***metadata, int *number_of_flows){
-
- meta_flows.clear();
- meta_nflow = number_of_flows;
- meta_flg = 1;
-
- Time_t t1 = sim_->RunUntilNextCompletion();
-
- *metadata = (meta_flows.empty() ? NULL : &meta_flows[0]);
- return 0;
-}
-
-int GTSim::run(double delta){
- meta_flg=0;
- sim_->Run(delta);
- return 0;
-}
-
-void GTSim::set_jitter(double d){
- xbt_assert(((0 <= d)&&(d <= 1)), "The jitter value must be within interval [0.0;1.0), got %f", d);
- jitter_ = d;
-}
-
-void GTSim::set_jitter_seed(int s){
- jitter_seed_ = s;
-
- if(jitter_seed_ > 0.0){
- XBT_INFO("Setting the jitter_seed with %d", jitter_seed_ );
- Random::GlobalSeed(jitter_seed_ , jitter_seed_ , jitter_seed_ ,jitter_seed_ ,jitter_seed_ ,jitter_seed_);
- }
-}
-
-void static tcp_sent_callback(void* action, double completion_time){
- // Schedule the flow complete event.
- SimulatorEvent* e =
- new SimulatorEvent(SimulatorEvent::FLOW_COMPLETE);
- Simulator::instance->Schedule(e, 0, Simulator::instance);
-
- if (meta_flg){
- meta_flows.push_back(action);
- (*meta_nflow)++;
- }
-}
-
-
