NS-3之Data Collection

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https://www.nsnam.org/docs/tutorial/html/data-collection.html

这是个目前还在开发中的模块

如果只是单纯的为了收集数据,然后做进一步的数据分析研究,使用NS-3的Tracing-system就足够了。

Data Collection模块的动机

*有些系统产生的数据没办法匹配Tracing系统中的PCAP 和ASCII

*大型仿真系统会产生大量的Trace数据,而这些数据会对系统硬盘IO造成很大的负担。

*在仿真过程中需要数据计算和修改。比较好的方案是使用为仿真定义好终端环境:什么时候开始,什么时候结束,包括什么时候有间隔。间隔多久。(需要进一步改善)


/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- *//* * 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 */#include <fstream>#include "ns3/core-module.h"#include "ns3/network-module.h"#include "ns3/internet-module.h"#include "ns3/point-to-point-module.h"#include "ns3/applications-module.h"#include "ns3/stats-module.h"using namespace ns3;NS_LOG_COMPONENT_DEFINE ("SeventhScriptExample");// ===========================================================================////         node 0                 node 1//   +----------------+    +----------------+//   |    ns-3 TCP    |    |    ns-3 TCP    |//   +----------------+    +----------------+//   |    10.1.1.1    |    |    10.1.1.2    |//   +----------------+    +----------------+//   | point-to-point |    | point-to-point |//   +----------------+    +----------------+//           |                     |//           +---------------------+//                5 Mbps, 2 ms////// We want to look at changes in the ns-3 TCP congestion window.  We need// to crank up a flow and hook the CongestionWindow attribute on the socket// of the sender.  Normally one would use an on-off application to generate a// flow, but this has a couple of problems.  First, the socket of the on-off// application is not created until Application Start time, so we wouldn't be// able to hook the socket (now) at configuration time.  Second, even if we// could arrange a call after start time, the socket is not public so we// couldn't get at it.//// So, we can cook up a simple version of the on-off application that does what// we want.  On the plus side we don't need all of the complexity of the on-off// application.  On the minus side, we don't have a helper, so we have to get// a little more involved in the details, but this is trivial.//// So first, we create a socket and do the trace connect on it; then we pass// this socket into the constructor of our simple application which we then// install in the source node.// ===========================================================================//class MyApp : public Application{public:  MyApp ();  virtual ~MyApp ();  /**   * Register this type.   * \return The TypeId.   */  static TypeId GetTypeId (void);  void Setup (Ptr<Socket> socket, Address address, uint32_t packetSize, uint32_t nPackets, DataRate dataRate);private:  virtual void StartApplication (void);  virtual void StopApplication (void);  void ScheduleTx (void);  void SendPacket (void);  Ptr<Socket>     m_socket;  Address         m_peer;  uint32_t        m_packetSize;  uint32_t        m_nPackets;  DataRate        m_dataRate;  EventId         m_sendEvent;  bool            m_running;  uint32_t        m_packetsSent;};MyApp::MyApp ()  : m_socket (0),    m_peer (),    m_packetSize (0),    m_nPackets (0),    m_dataRate (0),    m_sendEvent (),    m_running (false),    m_packetsSent (0){}MyApp::~MyApp (){  m_socket = 0;}/* static */TypeId MyApp::GetTypeId (void){  static TypeId tid = TypeId ("MyApp")    .SetParent<Application> ()    .SetGroupName ("Tutorial")    .AddConstructor<MyApp> ()    ;  return tid;}voidMyApp::Setup (Ptr<Socket> socket, Address address, uint32_t packetSize, uint32_t nPackets, DataRate dataRate){  m_socket = socket;  m_peer = address;  m_packetSize = packetSize;  m_nPackets = nPackets;  m_dataRate = dataRate;}voidMyApp::StartApplication (void){  m_running = true;  m_packetsSent = 0;  if (InetSocketAddress::IsMatchingType (m_peer))    {      m_socket->Bind ();    }  else    {      m_socket->Bind6 ();    }  m_socket->Connect (m_peer);  SendPacket ();}voidMyApp::StopApplication (void){  m_running = false;  if (m_sendEvent.IsRunning ())    {      Simulator::Cancel (m_sendEvent);    }  if (m_socket)    {      m_socket->Close ();    }}voidMyApp::SendPacket (void){  Ptr<Packet> packet = Create<Packet> (m_packetSize);  m_socket->Send (packet);  if (++m_packetsSent < m_nPackets)    {      ScheduleTx ();    }}voidMyApp::ScheduleTx (void){  if (m_running)    {      Time tNext (Seconds (m_packetSize * 8 / static_cast<double> (m_dataRate.GetBitRate ())));      m_sendEvent = Simulator::Schedule (tNext, &MyApp::SendPacket, this);    }}static voidCwndChange (Ptr<OutputStreamWrapper> stream, uint32_t oldCwnd, uint32_t newCwnd){  NS_LOG_UNCOND (Simulator::Now ().GetSeconds () << "\t" << newCwnd);  *stream->GetStream () << Simulator::Now ().GetSeconds () << "\t" << oldCwnd << "\t" << newCwnd << std::endl;}static voidRxDrop (Ptr<PcapFileWrapper> file, Ptr<const Packet> p){  NS_LOG_UNCOND ("RxDrop at " << Simulator::Now ().GetSeconds ());  file->Write (Simulator::Now (), p);}intmain (int argc, char *argv[]){  bool useV6 = false;  CommandLine cmd;  cmd.AddValue ("useIpv6", "Use Ipv6", useV6);  cmd.Parse (argc, argv);  NodeContainer nodes;  nodes.Create (2);  PointToPointHelper pointToPoint;  pointToPoint.SetDeviceAttribute ("DataRate", StringValue ("5Mbps"));  pointToPoint.SetChannelAttribute ("Delay", StringValue ("2ms"));  NetDeviceContainer devices;  devices = pointToPoint.Install (nodes);  Ptr<RateErrorModel> em = CreateObject<RateErrorModel> ();  em->SetAttribute ("ErrorRate", DoubleValue (0.00001));  devices.Get (1)->SetAttribute ("ReceiveErrorModel", PointerValue (em));  InternetStackHelper stack;  stack.Install (nodes);  uint16_t sinkPort = 8080;  Address sinkAddress;  Address anyAddress;  std::string probeType;  std::string tracePath;  if (useV6 == false)    {      Ipv4AddressHelper address;      address.SetBase ("10.1.1.0", "255.255.255.0");      Ipv4InterfaceContainer interfaces = address.Assign (devices);      sinkAddress = InetSocketAddress (interfaces.GetAddress (1), sinkPort);      anyAddress = InetSocketAddress (Ipv4Address::GetAny (), sinkPort);      probeType = "ns3::Ipv4PacketProbe";      tracePath = "/NodeList/*/$ns3::Ipv4L3Protocol/Tx";    }  else    {      Ipv6AddressHelper address;      address.SetBase ("2001:0000:f00d:cafe::", Ipv6Prefix (64));      Ipv6InterfaceContainer interfaces = address.Assign (devices);      sinkAddress = Inet6SocketAddress (interfaces.GetAddress (1,1), sinkPort);      anyAddress = Inet6SocketAddress (Ipv6Address::GetAny (), sinkPort);      probeType = "ns3::Ipv6PacketProbe";      tracePath = "/NodeList/*/$ns3::Ipv6L3Protocol/Tx";    }  PacketSinkHelper packetSinkHelper ("ns3::TcpSocketFactory", anyAddress);  ApplicationContainer sinkApps = packetSinkHelper.Install (nodes.Get (1));  sinkApps.Start (Seconds (0.));  sinkApps.Stop (Seconds (20.));  Ptr<Socket> ns3TcpSocket = Socket::CreateSocket (nodes.Get (0), TcpSocketFactory::GetTypeId ());  Ptr<MyApp> app = CreateObject<MyApp> ();  app->Setup (ns3TcpSocket, sinkAddress, 1040, 1000, DataRate ("1Mbps"));  nodes.Get (0)->AddApplication (app);  app->SetStartTime (Seconds (1.));  app->SetStopTime (Seconds (20.));  AsciiTraceHelper asciiTraceHelper;  Ptr<OutputStreamWrapper> stream = asciiTraceHelper.CreateFileStream ("seventh.cwnd");  ns3TcpSocket->TraceConnectWithoutContext ("CongestionWindow", MakeBoundCallback (&CwndChange, stream));  PcapHelper pcapHelper;  Ptr<PcapFileWrapper> file = pcapHelper.CreateFile ("seventh.pcap", std::ios::out, PcapHelper::DLT_PPP);  devices.Get (1)->TraceConnectWithoutContext ("PhyRxDrop", MakeBoundCallback (&RxDrop, file));  // Use GnuplotHelper to plot the packet byte count over time  GnuplotHelper plotHelper;  // Configure the plot.  The first argument is the file name prefix  // for the output files generated.  The second, third, and fourth  // arguments are, respectively, the plot title, x-axis, and y-axis labels  plotHelper.ConfigurePlot ("seventh-packet-byte-count",                            "Packet Byte Count vs. Time",                            "Time (Seconds)",                            "Packet Byte Count");  // Specify the probe type, trace source path (in configuration namespace), and  // probe output trace source ("OutputBytes") to plot.  The fourth argument  // specifies the name of the data series label on the plot.  The last  // argument formats the plot by specifying where the key should be placed.  plotHelper.PlotProbe (probeType,                        tracePath,                        "OutputBytes",                        "Packet Byte Count",                        GnuplotAggregator::KEY_BELOW);  // Use FileHelper to write out the packet byte count over time  FileHelper fileHelper;  // Configure the file to be written, and the formatting of output data.  fileHelper.ConfigureFile ("seventh-packet-byte-count",                            FileAggregator::FORMATTED);  // Set the labels for this formatted output file.  fileHelper.Set2dFormat ("Time (Seconds) = %.3e\tPacket Byte Count = %.0f");  // Specify the probe type, trace source path (in configuration namespace), and  // probe output trace source ("OutputBytes") to write.  fileHelper.WriteProbe (probeType,                         tracePath,                         "OutputBytes");  Simulator::Stop (Seconds (20));  Simulator::Run ();  Simulator::Destroy ();  return 0;}


此处使用的是GnuplotHelper 和FileHelper
GnuplotHelper 对象产生gnuplot 的带属性的点图,使用的数据类型是Tracesource的,但并不支持所有的Trace的数据类型。

输出的格式有以下三种形式

seventh-packet-byte-count.datseventh-packet-byte-count.pltseventh-packet-byte-count.sh


支持的Trace类型

支持的Trace 值数据类型

TracedValue typeProbe typeFiledoubleDoubleProbestats/model/double-probe.huint8_tUinteger8Probestats/model/uinteger-8-probe.huint16_tUinteger16Probestats/model/uinteger-16-probe.huint32_tUinteger32Probestats/model/uinteger-32-probe.hboolBooleanProbestats/model/uinteger-16-probe.hns3::TimeTimeProbestats/model/time-probe.h
支持的Trace类型

TracedSource typeProbe typeProbe outputsFilePtr<const Packet>PacketProbeOutputBytesnetwork/utils/packet-probe.hPtr<const Packet>, Ptr<Ipv4>, uint32_tIpv4PacketProbeOutputBytesinternet/model/ipv4-packet-probe.hPtr<const Packet>, Ptr<Ipv6>, uint32_tIpv6PacketProbeOutputBytesinternet/model/ipv6-packet-probe.hPtr<const Packet>, Ptr<Ipv6>, uint32_tIpv6PacketProbeOutputBytesinternet/model/ipv6-packet-probe.hPtr<const Packet>, const Address&ApplicationPacketProbeOutputBytesapplications/model/application-packet-probe.h


FileHelper是作为GnuplotHelper 的一种变形来使用。

接下来准备增加数据分析模块。

功能越来越强大了。