Add MSDU aggregation throughput test.
This patch adds a test suite and initial test for the Wi-Fi MSDU aggregation support in ns-3. The test is a throughput test and is a regression test for Bug 873 - Queue occupancy counter not decremented in WifiMacQueue::Remove().
This commit is contained in:
Dean Armstrong
204
src/test/ns3wifi/wifi-msdu-aggregator-test-suite.cc
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204
src/test/ns3wifi/wifi-msdu-aggregator-test-suite.cc
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/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2010 Dean Armstrong
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Dean Armstrong <deanarm@gmail.com>
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*/
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#include "ns3/test.h"
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#include "ns3/simulator.h"
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#include "ns3/log.h"
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#include "ns3/boolean.h"
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#include "ns3/string.h"
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#include "ns3/double.h"
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#include "ns3/ssid.h"
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#include "ns3/data-rate.h"
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#include "ns3/inet-socket-address.h"
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#include "ns3/packet-sink.h"
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#include "ns3/wifi-helper.h"
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#include "ns3/qos-wifi-mac-helper.h"
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#include "ns3/yans-wifi-helper.h"
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#include "ns3/mobility-helper.h"
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#include "ns3/internet-stack-helper.h"
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#include "ns3/ipv4-address-helper.h"
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#include "ns3/packet-sink-helper.h"
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#include "ns3/on-off-helper.h"
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NS_LOG_COMPONENT_DEFINE ("WifiMsduAggregatorThroughputTest");
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using namespace ns3;
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class WifiMsduAggregatorThroughputTest : public TestCase
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{
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public:
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WifiMsduAggregatorThroughputTest ();
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virtual bool DoRun (void);
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};
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WifiMsduAggregatorThroughputTest::WifiMsduAggregatorThroughputTest ()
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: TestCase ("MsduAggregator throughput test")
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{
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}
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bool
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WifiMsduAggregatorThroughputTest::DoRun (void)
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{
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WifiHelper wifi = WifiHelper::Default ();
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QosWifiMacHelper wifiMac = QosWifiMacHelper::Default ();
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YansWifiPhyHelper wifiPhy = YansWifiPhyHelper::Default ();
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YansWifiChannelHelper wifiChannel = YansWifiChannelHelper::Default ();
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wifiPhy.SetChannel (wifiChannel.Create ());
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Ssid ssid = Ssid ("wifi-amsdu-throughput");
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// It may seem a little farcical running an 802.11n aggregation
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// scenario with 802.11b rates (transmit rate fixed to 1 Mbps, no
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// less), but this approach tests the bit we need to without unduly
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// increasing the complexity of the simulation.
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std::string phyMode ("wifib-1mbs");
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wifi.SetStandard (WIFI_PHY_STANDARD_80211b);
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wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
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"DataMode", StringValue (phyMode),
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"ControlMode", StringValue (phyMode));
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// Setup the AP, which will be the source of traffic for this test
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// and thus has an aggregator on AC_BE.
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NodeContainer ap;
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ap.Create (1);
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wifiMac.SetType ("ns3::QapWifiMac",
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"Ssid", SsidValue (ssid),
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"BeaconGeneration", BooleanValue (true),
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"BeaconInterval", TimeValue (MilliSeconds (102.4)));
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wifiMac.SetMsduAggregatorForAc (AC_BE, "ns3::MsduStandardAggregator",
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"MaxAmsduSize", UintegerValue (4000));
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NetDeviceContainer apDev = wifi.Install (wifiPhy, wifiMac, ap);
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// Setup one STA, which will be the sink for traffic in this test.
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NodeContainer sta;
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sta.Create (1);
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wifiMac.SetType ("ns3::QstaWifiMac",
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"Ssid", SsidValue (ssid),
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"ActiveProbing", BooleanValue (false));
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NetDeviceContainer staDev = wifi.Install (wifiPhy, wifiMac, sta);
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// Our devices will have fixed positions
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MobilityHelper mobility;
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mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
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mobility.SetPositionAllocator ("ns3::GridPositionAllocator",
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"MinX", DoubleValue (0.0),
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"MinY", DoubleValue (0.0),
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"DeltaX", DoubleValue (5.0),
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"DeltaY", DoubleValue (10.0),
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"GridWidth", UintegerValue (2),
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"LayoutType", StringValue ("RowFirst"));
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mobility.Install (sta);
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mobility.Install (ap);
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// Now we install internet stacks on our devices
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InternetStackHelper stack;
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stack.Install (ap);
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stack.Install (sta);
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Ipv4AddressHelper address;
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address.SetBase ("192.168.0.0", "255.255.255.0");
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Ipv4InterfaceContainer staNodeInterface, apNodeInterface;
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staNodeInterface = address.Assign (staDev);
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apNodeInterface = address.Assign (apDev);
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// The applications for this test will see a unidirectional UDP
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// stream from the AP to the STA. The following UDP port will be
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// used (arbitrary choice).
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uint16_t udpPort = 50000;
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// The packet sink application is on the STA device, and is running
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// right from the start. The traffic source will turn on at 1 second
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// and then off at 9 seconds, so we turn the sink off at 9 seconds
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// too in order to measure throughput in a fixed window.
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PacketSinkHelper packetSink ("ns3::UdpSocketFactory",
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InetSocketAddress(Ipv4Address::GetAny(),
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udpPort));
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ApplicationContainer sinkApp = packetSink.Install (sta.Get (0));
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sinkApp.Start (Seconds (0));
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sinkApp.Stop (Seconds (9.0));
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// The packet source is an on-off application on the AP
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// device. Given that we have fixed the transmit rate at 1 Mbps
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// above, a 1 Mbps stream at the transport layer should be sufficent
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// to determine whether aggregation is working or not.
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//
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// We configure this traffic stream to operate between 1 and 9 seconds.
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OnOffHelper onoff ("ns3::UdpSocketFactory",
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InetSocketAddress (staNodeInterface.GetAddress (0),
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udpPort));
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onoff.SetAttribute ("DataRate", DataRateValue(DataRate("1Mbps")));
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onoff.SetAttribute ("PacketSize", UintegerValue(100));
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onoff.SetAttribute ("OnTime", RandomVariableValue (ConstantVariable (1)));
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onoff.SetAttribute ("OffTime", RandomVariableValue (ConstantVariable (0)));
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ApplicationContainer sourceApp = onoff.Install (ap.Get (0));
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sourceApp.Start (Seconds (1.0));
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sourceApp.Stop (Seconds (9.0));
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// Enable tracing at the AP
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wifiPhy.EnablePcap ("wifi-amsdu-throughput", sta.Get (0)->GetId (), 0);
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Simulator::Stop (Seconds (10.0));
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Simulator::Run ();
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Simulator::Destroy ();
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// Now the simulation is complete we note the total number of octets
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// receive at the packet sink so that we can shortly test that this
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// is plausible.
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uint32_t totalOctetsThrough =
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DynamicCast<PacketSink>(sinkApp.Get (0))->GetTotalRx ();
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// Check that throughput was acceptable. This threshold is set based
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// on inspection of a trace where things are working. Basically, we
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// there get 26 UDP packets (of size 100, as specified above)
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// aggregated per A-MSDU, for which the complete frame exchange
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// (including RTS/CTS and plus medium access) takes around 32
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// ms. Over the eight seconds of the test this means we expect about
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// 650 kilobytes, so a pass threshold of 600000 seems to provide a
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// fair amount of margin to account for reduced utilisation around
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// stream startup, and contention around AP beacon transmission.
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//
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// If aggregation is turned off, then we get about 350 kilobytes in
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// the same test, so we'll definitely catch the major failures.
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NS_TEST_ASSERT_MSG_GT(totalOctetsThrough, 600000,
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"A-MSDU test fails for low throughput of "
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<< totalOctetsThrough << " octets");
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return false;
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}
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// For now the MSDU Aggregator Test Suite contains only the one test
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// that is defined in this file, so it's class definition and
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// instantiation can live here.
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class WifiMsduAggregatorTestSuite : public TestSuite
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{
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public:
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WifiMsduAggregatorTestSuite ();
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};
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WifiMsduAggregatorTestSuite::WifiMsduAggregatorTestSuite ()
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: TestSuite ("ns3-wifi-msdu-aggregator", SYSTEM)
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{
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AddTestCase (new WifiMsduAggregatorThroughputTest);
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}
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WifiMsduAggregatorTestSuite wifiMsduAggregatorTestSuite;
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@@ -7,6 +7,7 @@ def build(bld):
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ns3wifi = bld.create_ns3_module('ns3wifi')
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ns3wifi.source = [
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'wifi-interference-test-suite.cc',
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'wifi-msdu-aggregator-test-suite.cc',
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]
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headers = bld.new_task_gen('ns3header')
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headers.module = 'ns3wifi'
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