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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/*
* Copyright (c) 2013 University of California, Los Angeles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
*/
#include "l2-rate-tracer.hpp"
#include "ns3/node.h"
#include "ns3/packet.h"
#include "ns3/config.h"
#include "ns3/callback.h"
#include "ns3/simulator.h"
#include "ns3/node-list.h"
#include "ns3/node.h"
#include "ns3/log.h"
#include <boost/lexical_cast.hpp>
#include <fstream>
NS_LOG_COMPONENT_DEFINE("L2RateTracer");
namespace ns3 {
static std::list<std::tuple<std::shared_ptr<std::ostream>, std::list<Ptr<L2RateTracer>>>>
g_tracers;
void
L2RateTracer::Destroy()
{
g_tracers.clear();
}
void
L2RateTracer::InstallAll(const std::string& file, Time averagingPeriod /* = Seconds (0.5)*/)
{
std::list<Ptr<L2RateTracer>> tracers;
std::shared_ptr<std::ostream> outputStream;
if (file != "-") {
std::shared_ptr<std::ofstream> os(new std::ofstream());
os->open(file.c_str(), std::ios_base::out | std::ios_base::trunc);
if (!os->is_open()) {
NS_LOG_ERROR("File " << file << " cannot be opened for writing. Tracing disabled");
return;
}
outputStream = os;
}
else {
outputStream = std::shared_ptr<std::ostream>(&std::cout, std::bind([]{}));
}
for (NodeList::Iterator node = NodeList::Begin(); node != NodeList::End(); node++) {
NS_LOG_DEBUG("Node: " << boost::lexical_cast<std::string>((*node)->GetId()));
Ptr<L2RateTracer> trace = Create<L2RateTracer>(outputStream, *node);
trace->SetAveragingPeriod(averagingPeriod);
tracers.push_back(trace);
}
if (tracers.size() > 0) {
// *m_l3RateTrace << "# "; // not necessary for R's read.table
tracers.front()->PrintHeader(*outputStream);
*outputStream << "\n";
}
g_tracers.push_back(std::make_tuple(outputStream, tracers));
}
L2RateTracer::L2RateTracer(std::shared_ptr<std::ostream> os, Ptr<Node> node)
: L2Tracer(node)
, m_os(os)
{
SetAveragingPeriod(Seconds(1.0));
}
L2RateTracer::~L2RateTracer()
{
m_printEvent.Cancel();
}
void
L2RateTracer::SetAveragingPeriod(const Time& period)
{
m_period = period;
m_printEvent.Cancel();
m_printEvent = Simulator::Schedule(m_period, &L2RateTracer::PeriodicPrinter, this);
}
void
L2RateTracer::PeriodicPrinter()
{
Print(*m_os);
Reset();
m_printEvent = Simulator::Schedule(m_period, &L2RateTracer::PeriodicPrinter, this);
}
void
L2RateTracer::PrintHeader(std::ostream& os) const
{
os << "Time"
<< "\t"
<< "Node"
<< "\t"
<< "Interface"
<< "\t"
<< "Type"
<< "\t"
<< "Packets"
<< "\t"
<< "Kilobytes"
<< "\t"
<< "PacketsRaw"
<< "\t"
<< "KilobytesRaw";
}
void
L2RateTracer::Reset()
{
std::get<0>(m_stats).Reset();
std::get<1>(m_stats).Reset();
}
const double alpha = 0.8;
#define STATS(INDEX) std::get<INDEX>(m_stats)
#define RATE(INDEX, fieldName) STATS(INDEX).fieldName / m_period.ToDouble(Time::S)
#define PRINTER(printName, fieldName, interface) \
STATS(2).fieldName = \
/*new value*/ alpha * RATE(0, fieldName) + /*old value*/ (1 - alpha) * STATS(2).fieldName; \
STATS(3).fieldName = /*new value*/ alpha * RATE(1, fieldName) / 1024.0 \
+ /*old value*/ (1 - alpha) * STATS(3).fieldName; \
\
os << time.ToDouble(Time::S) << "\t" << m_node << "\t" << interface << "\t" << printName << "\t" \
<< STATS(2).fieldName << "\t" << STATS(3).fieldName << "\t" << STATS(0).fieldName << "\t" \
<< STATS(1).fieldName / 1024.0 << "\n";
void
L2RateTracer::Print(std::ostream& os) const
{
Time time = Simulator::Now();
PRINTER("Drop", m_drop, "combined");
}
void
L2RateTracer::Drop(Ptr<const Packet> packet)
{
// no interface information... this should be part of this L2Tracer object data
std::get<0>(m_stats).m_drop++;
std::get<1>(m_stats).m_drop += packet->GetSize();
}
} // namespace ns3