ruby: rename networktest to garnet_synthetic_traffic.

networktest is essentially a collection of synthetic traffic patterns
for the network. The protocol name and the tester having the same name
led to multiple python configuration files with the same name, adding
confusion. This patch renames networktest to garnet_synthetic_traffic,
and also adds more synthetic traffic patterns.

4 files changed, 617 insertions, 0 deletions

diff --git a/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.cc b/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.cc
new file mode 100644
index 000000000..f5a718697
--- /dev/null
+++ b/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.cc
@@ -0,0 +1,358 @@
+/*
+ * Copyright (c) 2016 Georgia Institute of Technology
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Tushar Krishna
+ */
+
+#include <cmath>
+#include <iomanip>
+#include <set>
+#include <string>
+#include <vector>
+
+#include "base/misc.hh"
+#include "base/random.hh"
+#include "base/statistics.hh"
+#include "cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.hh"
+#include "debug/GarnetSyntheticTraffic.hh"
+#include "mem/mem_object.hh"
+#include "mem/packet.hh"
+#include "mem/port.hh"
+#include "mem/request.hh"
+#include "sim/sim_events.hh"
+#include "sim/stats.hh"
+#include "sim/system.hh"
+
+using namespace std;
+
+int TESTER_NETWORK=0;
+
+bool
+GarnetSyntheticTraffic::CpuPort::recvTimingResp(PacketPtr pkt)
+{
+    tester->completeRequest(pkt);
+    return true;
+}
+
+void
+GarnetSyntheticTraffic::CpuPort::recvReqRetry()
+{
+    tester->doRetry();
+}
+
+void
+GarnetSyntheticTraffic::sendPkt(PacketPtr pkt)
+{
+    if (!cachePort.sendTimingReq(pkt)) {
+        retryPkt = pkt; // RubyPort will retry sending
+    }
+    numPacketsSent++;
+}
+
+GarnetSyntheticTraffic::GarnetSyntheticTraffic(const Params *p)
+    : MemObject(p),
+      tickEvent(this),
+      cachePort("GarnetSyntheticTraffic", this),
+      retryPkt(NULL),
+      size(p->memory_size),
+      blockSizeBits(p->block_offset),
+      numDestinations(p->num_dest),
+      simCycles(p->sim_cycles),
+      numPacketsMax(p->num_packets_max),
+      numPacketsSent(0),
+      singleSender(p->single_sender),
+      singleDest(p->single_dest),
+      trafficType(p->traffic_type),
+      injRate(p->inj_rate),
+      injVnet(p->inj_vnet),
+      precision(p->precision),
+      responseLimit(p->response_limit),
+      masterId(p->system->getMasterId(name()))
+{
+    // set up counters
+    noResponseCycles = 0;
+    schedule(tickEvent, 0);
+
+    initTrafficType();
+    if (trafficStringToEnum.count(trafficType) == 0) {
+        fatal("Unknown Traffic Type: %s!\n", traffic);
+    }
+    traffic = trafficStringToEnum[trafficType];
+
+    id = TESTER_NETWORK++;
+    DPRINTF(GarnetSyntheticTraffic,"Config Created: Name = %s , and id = %d\n",
+            name(), id);
+}
+
+BaseMasterPort &
+GarnetSyntheticTraffic::getMasterPort(const std::string &if_name, PortID idx)
+{
+    if (if_name == "test")
+        return cachePort;
+    else
+        return MemObject::getMasterPort(if_name, idx);
+}
+
+void
+GarnetSyntheticTraffic::init()
+{
+    numPacketsSent = 0;
+}
+
+
+void
+GarnetSyntheticTraffic::completeRequest(PacketPtr pkt)
+{
+    Request *req = pkt->req;
+
+    DPRINTF(GarnetSyntheticTraffic,
+            "Completed injection of %s packet for address %x\n",
+            pkt->isWrite() ? "write" : "read\n",
+            req->getPaddr());
+
+    assert(pkt->isResponse());
+    noResponseCycles = 0;
+    delete req;
+    delete pkt;
+}
+
+
+void
+GarnetSyntheticTraffic::tick()
+{
+    if (++noResponseCycles >= responseLimit) {
+        fatal("%s deadlocked at cycle %d\n", name(), curTick());
+    }
+
+    // make new request based on injection rate
+    // (injection rate's range depends on precision)
+    // - generate a random number between 0 and 10^precision
+    // - send pkt if this number is < injRate*(10^precision)
+    bool sendAllowedThisCycle;
+    double injRange = pow((double) 10, (double) precision);
+    unsigned trySending = random_mt.random<unsigned>(0, (int) injRange);
+    if (trySending < injRate*injRange)
+        sendAllowedThisCycle = true;
+    else
+        sendAllowedThisCycle = false;
+
+    // always generatePkt unless fixedPkts or singleSender is enabled
+    if (sendAllowedThisCycle) {
+        bool senderEnable = true;
+
+        if (numPacketsMax >= 0 && numPacketsSent >= numPacketsMax)
+            senderEnable = false;
+
+        if (singleSender >= 0 && id != singleSender)
+            senderEnable = false;
+
+        if (senderEnable)
+            generatePkt();
+    }
+
+    // Schedule wakeup
+    if (curTick() >= simCycles)
+        exitSimLoop("Network Tester completed simCycles");
+    else {
+        if (!tickEvent.scheduled())
+            schedule(tickEvent, clockEdge(Cycles(1)));
+    }
+}
+
+void
+GarnetSyntheticTraffic::generatePkt()
+{
+    int num_destinations = numDestinations;
+    int radix = (int) sqrt(num_destinations);
+    unsigned destination = id;
+    int dest_x = -1;
+    int dest_y = -1;
+    int source = id;
+    int src_x = id%radix;
+    int src_y = id/radix;
+
+    if (singleDest >= 0)
+    {
+        destination = singleDest;
+    } else if (traffic == UNIFORM_RANDOM_) {
+        destination = random_mt.random<unsigned>(0, num_destinations - 1);
+    } else if (traffic == BIT_COMPLEMENT_) {
+        dest_x = radix - src_x - 1;
+        dest_y = radix - src_y - 1;
+        destination = dest_y*radix + dest_x;
+    } else if (traffic == BIT_REVERSE_) {
+        unsigned int straight = source;
+        unsigned int reverse = source & 1; // LSB
+
+        int num_bits = (int) log2(num_destinations);
+
+        for (int i = 1; i < num_bits; i++)
+        {
+            reverse <<= 1;
+            straight >>= 1;
+            reverse |= (straight & 1); // LSB
+        }
+        destination = reverse;
+    } else if (traffic == BIT_ROTATION_) {
+        if (source%2 == 0)
+            destination = source/2;
+        else // (source%2 == 1)
+            destination = ((source/2) + (num_destinations/2));
+    } else if (traffic == NEIGHBOR_) {
+            dest_x = (src_x + 1) % radix;
+            dest_y = src_y;
+            destination = dest_y*radix + dest_x;
+    } else if (traffic == SHUFFLE_) {
+        if (source < num_destinations/2)
+            destination = source*2;
+        else
+            destination = (source*2 - num_destinations + 1);
+    } else if (traffic == TRANSPOSE_) {
+            dest_x = src_y;
+            dest_y = src_x;
+            destination = dest_y*radix + dest_x;
+    } else if (traffic == TORNADO_) {
+        dest_x = (src_x + (int) ceil(radix/2) - 1) % radix;
+        dest_y = src_y;
+        destination = dest_y*radix + dest_x;
+    }
+    else {
+        fatal("Unknown Traffic Type: %s!\n", traffic);
+    }
+
+    // The source of the packets is a cache.
+    // The destination of the packets is a directory.
+    // The destination bits are embedded in the address after byte-offset.
+    Addr paddr =  destination;
+    paddr <<= blockSizeBits;
+    unsigned access_size = 1; // Does not affect Ruby simulation
+
+    // Modeling different coherence msg types over different msg classes.
+    //
+    // GarnetSyntheticTraffic assumes the Garnet_standalone coherence protocol
+    // which models three message classes/virtual networks.
+    // These are: request, forward, response.
+    // requests and forwards are "control" packets (typically 8 bytes),
+    // while responses are "data" packets (typically 72 bytes).
+    //
+    // Life of a packet from the tester into the network:
+    // (1) This function generatePkt() generates packets of one of the
+    //     following 3 types (randomly) : ReadReq, INST_FETCH, WriteReq
+    // (2) mem/ruby/system/RubyPort.cc converts these to RubyRequestType_LD,
+    //     RubyRequestType_IFETCH, RubyRequestType_ST respectively
+    // (3) mem/ruby/system/Sequencer.cc sends these to the cache controllers
+    //     in the coherence protocol.
+    // (4) Network_test-cache.sm tags RubyRequestType:LD,
+    //     RubyRequestType:IFETCH and RubyRequestType:ST as
+    //     Request, Forward, and Response events respectively;
+    //     and injects them into virtual networks 0, 1 and 2 respectively.
+    //     It immediately calls back the sequencer.
+    // (5) The packet traverses the network (simple/garnet) and reaches its
+    //     destination (Directory), and network stats are updated.
+    // (6) Network_test-dir.sm simply drops the packet.
+    //
+    MemCmd::Command requestType;
+
+    Request *req = nullptr;
+    Request::Flags flags;
+
+    // Inject in specific Vnet
+    // Vnet 0 and 1 are for control packets (1-flit)
+    // Vnet 2 is for data packets (5-flit)
+    int injReqType = injVnet;
+
+    if (injReqType < 0 || injReqType > 2)
+    {
+        // randomly inject in any vnet
+        injReqType = random_mt.random(0, 2);
+    }
+
+    if (injReqType == 0) {
+        // generate packet for virtual network 0
+        requestType = MemCmd::ReadReq;
+        req = new Request(paddr, access_size, flags, masterId);
+    } else if (injReqType == 1) {
+        // generate packet for virtual network 1
+        requestType = MemCmd::ReadReq;
+        flags.set(Request::INST_FETCH);
+        req = new Request(0, 0x0, access_size, flags, masterId, 0x0, 0);
+        req->setPaddr(paddr);
+    } else {  // if (injReqType == 2)
+        // generate packet for virtual network 2
+        requestType = MemCmd::WriteReq;
+        req = new Request(paddr, access_size, flags, masterId);
+    }
+
+    req->setContext(id);
+
+    //No need to do functional simulation
+    //We just do timing simulation of the network
+
+    DPRINTF(GarnetSyntheticTraffic,
+            "Generated packet with destination %d, embedded in address %x\n",
+            destination, req->getPaddr());
+
+    PacketPtr pkt = new Packet(req, requestType);
+    pkt->dataDynamic(new uint8_t[req->getSize()]);
+    pkt->senderState = NULL;
+
+    sendPkt(pkt);
+}
+
+void
+GarnetSyntheticTraffic::initTrafficType()
+{
+    trafficStringToEnum["bit_complement"] = BIT_COMPLEMENT_;
+    trafficStringToEnum["bit_reverse"] = BIT_REVERSE_;
+    trafficStringToEnum["bit_rotation"] = BIT_ROTATION_;
+    trafficStringToEnum["neighbor"] = NEIGHBOR_;
+    trafficStringToEnum["shuffle"] = SHUFFLE_;
+    trafficStringToEnum["tornado"] = TORNADO_;
+    trafficStringToEnum["transpose"] = TRANSPOSE_;
+    trafficStringToEnum["uniform_random"] = UNIFORM_RANDOM_;
+}
+
+void
+GarnetSyntheticTraffic::doRetry()
+{
+    if (cachePort.sendTimingReq(retryPkt)) {
+        retryPkt = NULL;
+    }
+}
+
+void
+GarnetSyntheticTraffic::printAddr(Addr a)
+{
+    cachePort.printAddr(a);
+}
+
+
+GarnetSyntheticTraffic *
+GarnetSyntheticTrafficParams::create()
+{
+    return new GarnetSyntheticTraffic(this);
+}
diff --git a/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.hh b/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.hh
new file mode 100644
index 000000000..94eee44d7
--- /dev/null
+++ b/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.hh
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2016 Georgia Institute of Technology
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Tushar Krishna
+ */
+
+#ifndef __CPU_GARNET_SYNTHETIC_TRAFFIC_HH__
+#define __CPU_GARNET_SYNTHETIC_TRAFFIC_HH__
+
+#include <set>
+
+#include "base/statistics.hh"
+#include "mem/mem_object.hh"
+#include "mem/port.hh"
+#include "params/GarnetSyntheticTraffic.hh"
+#include "sim/eventq.hh"
+#include "sim/sim_exit.hh"
+#include "sim/sim_object.hh"
+#include "sim/stats.hh"
+
+enum TrafficType {BIT_COMPLEMENT_ = 0,
+                  BIT_REVERSE_ = 1,
+                  BIT_ROTATION_ = 2,
+                  NEIGHBOR_ = 3,
+                  SHUFFLE_ = 4,
+                  TORNADO_ = 5,
+                  TRANSPOSE_ = 6,
+                  UNIFORM_RANDOM_ = 7,
+                  NUM_TRAFFIC_PATTERNS_};
+
+class Packet;
+class GarnetSyntheticTraffic : public MemObject
+{
+  public:
+    typedef GarnetSyntheticTrafficParams Params;
+    GarnetSyntheticTraffic(const Params *p);
+
+    virtual void init();
+
+    // main simulation loop (one cycle)
+    void tick();
+
+    virtual BaseMasterPort &getMasterPort(const std::string &if_name,
+                                          PortID idx = InvalidPortID);
+
+    /**
+     * Print state of address in memory system via PrintReq (for
+     * debugging).
+     */
+    void printAddr(Addr a);
+
+  protected:
+    class TickEvent : public Event
+    {
+      private:
+        GarnetSyntheticTraffic *cpu;
+
+      public:
+        TickEvent(GarnetSyntheticTraffic *c) : Event(CPU_Tick_Pri), cpu(c) {}
+        void process() { cpu->tick(); }
+        virtual const char *description() const
+        {
+            return "GarnetSyntheticTraffic tick";
+        }
+    };
+
+    TickEvent tickEvent;
+
+    class CpuPort : public MasterPort
+    {
+        GarnetSyntheticTraffic *tester;
+
+      public:
+
+        CpuPort(const std::string &_name, GarnetSyntheticTraffic *_tester)
+            : MasterPort(_name, _tester), tester(_tester)
+        { }
+
+      protected:
+
+        virtual bool recvTimingResp(PacketPtr pkt);
+
+        virtual void recvReqRetry();
+    };
+
+    CpuPort cachePort;
+
+    class GarnetSyntheticTrafficSenderState : public Packet::SenderState
+    {
+      public:
+        /** Constructor. */
+        GarnetSyntheticTrafficSenderState(uint8_t *_data)
+            : data(_data)
+        { }
+
+        // Hold onto data pointer
+        uint8_t *data;
+    };
+
+    PacketPtr retryPkt;
+    unsigned size;
+    int id;
+
+    std::map<std::string, TrafficType> trafficStringToEnum;
+
+    unsigned blockSizeBits;
+
+    Tick noResponseCycles;
+
+    int numDestinations;
+    Tick simCycles;
+    int numPacketsMax;
+    int numPacketsSent;
+    int singleSender;
+    int singleDest;
+
+    std::string trafficType; // string
+    TrafficType traffic; // enum from string
+    double injRate;
+    int injVnet;
+    int precision;
+
+    const Cycles responseLimit;
+
+    MasterID masterId;
+
+    void completeRequest(PacketPtr pkt);
+
+    void generatePkt();
+    void sendPkt(PacketPtr pkt);
+    void initTrafficType();
+
+    void doRetry();
+
+    friend class MemCompleteEvent;
+};
+
+#endif // __CPU_GARNET_SYNTHETIC_TRAFFIC_HH__
+
+
+
diff --git a/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.py b/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.py
new file mode 100644
index 000000000..261e643c1
--- /dev/null
+++ b/src/cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.py
@@ -0,0 +1,57 @@
+# Copyright (c) 2016 Georgia Institute of Technology
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Tushar Krishna
+
+from MemObject import MemObject
+from m5.params import *
+from m5.proxy import *
+
+class GarnetSyntheticTraffic(MemObject):
+    type = 'GarnetSyntheticTraffic'
+    cxx_header = \
+        "cpu/testers/garnet_synthetic_traffic/GarnetSyntheticTraffic.hh"
+    block_offset = Param.Int(6, "block offset in bits")
+    num_dest = Param.Int(1, "Number of Destinations")
+    memory_size = Param.Int(65536, "memory size")
+    sim_cycles = Param.Int(1000, "Number of simulation cycles")
+    num_packets_max = Param.Int(-1, "Max number of packets to send. \
+                        Default is to keep sending till simulation ends")
+    single_sender = Param.Int(-1, "Send only from this node. \
+                                   By default every node sends")
+    single_dest = Param.Int(-1, "Send only to this dest. \
+                                 Default depends on traffic_type")
+    traffic_type = Param.String("uniform_random", "Traffic type")
+    inj_rate = Param.Float(0.1, "Packet injection rate")
+    inj_vnet = Param.Int(-1, "Vnet to inject in. \
+                              0 and 1 are 1-flit, 2 is 5-flit. \
+                                Default is to inject in all three vnets")
+    precision = Param.Int(3, "Number of digits of precision \
+                              after decimal point")
+    response_limit = Param.Cycles(5000000, "Cycles before exiting \
+                                            due to lack of progress")
+    test = MasterPort("Port to the memory system to test")
+    system = Param.System(Parent.any, "System we belong to")
diff --git a/src/cpu/testers/garnet_synthetic_traffic/SConscript b/src/cpu/testers/garnet_synthetic_traffic/SConscript
new file mode 100644
index 000000000..f1624b05e
--- /dev/null
+++ b/src/cpu/testers/garnet_synthetic_traffic/SConscript
@@ -0,0 +1,37 @@
+# -*- mode:python -*-
+
+# Copyright (c) 2016 Georgia Institute of Technology.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met: redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer;
+# redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution;
+# neither the name of the copyright holders nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors: Tushar Krishna
+
+Import('*')
+
+SimObject('GarnetSyntheticTraffic.py')
+
+Source('GarnetSyntheticTraffic.cc')
+
+DebugFlag('GarnetSyntheticTraffic')