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;}
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 值数据类型
支持的Trace类型
TracedSource type Probe type Probe outputs File
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。
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