#endif
#include "xbt/log.h"
#include "xbt/asserts.h"
+#include "RngStream.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(surf_network_gtnets_simulator, surf_network_gtnets,
"Logging specific to the SURF network GTNetS simulator");
int wsize = 20000;
is_topology_ = 0;
nflow_ = 0;
- sim_ = new Simulator();
- topo_ = new GTNETS_Topology();
jitter_ = 0;
jitter_seed_ = 10;
- sim_->verbose=false;
+ // 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_);
DEBUG2("Using jitter %f, and seed %u", jitter_, jitter_seed_);
double min = -1*jitter_*latency;
double max = jitter_*latency;
- //initialize the random seed only once, when adding the first link
- if(uniform_jitter_generator_.empty()){
- Random::GlobalSeed(jitter_seed_ , jitter_seed_+1, jitter_seed_+2,
- jitter_seed_+3, jitter_seed_+4, jitter_seed_+5);
- }
uniform_jitter_generator_[id] = new Uniform(min,max);
gtnets_links_[id]->Jitter((const Random &) *(uniform_jitter_generator_[id]));
}
pipe(pfds);
t1 = 0;
-
- if ( (soon_pid=fork()) != 0){
+ fflush (NULL);
+ if( (soon_pid=fork()) != 0){
read(pfds[0], &t1, sizeof(Time_t));
waitpid(soon_pid, &status, 0);
}else{
return gtnets_servers_[flow_id]->GetTotRx();
}
+
int GTSim::run_until_next_flow_completion(void ***metadata, int *number_of_flows){
meta_flows.clear();
}
void GTSim::set_jitter(double d){
- xbt_assert1(((0 <= d)&&(d <= 1)), "The jitter value must be within interval [0.0;1.0], got %f", d);
+ xbt_assert1(((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){
+ INFO1("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){
