/*
- * Copyright (c) 2003 The Regents of The University of Michigan
+ * Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include <string>
#include <vector>
+#include "base/random.hh"
#include "base/trace.hh"
#include "dev/etherdump.hh"
#include "dev/etherint.hh"
#include "dev/etherlink.hh"
#include "dev/etherpkt.hh"
#include "sim/builder.hh"
-#include "sim/universe.hh"
+#include "sim/serialize.hh"
#include "sim/system.hh"
+#include "sim/root.hh"
using namespace std;
-EtherLink::EtherLink(const std::string &name, EtherInt *i1, EtherInt *i2,
- Tick speed, EtherDump *dump)
+EtherLink::EtherLink(const string &name, EtherInt *peer0, EtherInt *peer1,
+ double rate, Tick delay, Tick delayVar, EtherDump *dump)
: SimObject(name)
{
- double rate = ((double)ticksPerSecond * 8.0) / (double)speed;
+ link[0] = new Link(name + ".link0", this, 0, rate, delay, delayVar, dump);
+ link[1] = new Link(name + ".link1", this, 1, rate, delay, delayVar, dump);
- link1 = new Link(name + ".link1", rate, dump);
- link2 = new Link(name + ".link2", rate, dump);
+ interface[0] = new Interface(name + ".int0", link[0], link[1]);
+ interface[1] = new Interface(name + ".int1", link[1], link[0]);
- int1 = new Interface(name + ".int1", link1, link2);
- int2 = new Interface(name + ".int2", link2, link1);
-
- int1->setPeer(i1);
- i1->setPeer(int1);
- int2->setPeer(i2);
- i2->setPeer(int2);
+ interface[0]->setPeer(peer0);
+ peer0->setPeer(interface[0]);
+ interface[1]->setPeer(peer1);
+ peer1->setPeer(interface[1]);
}
EtherLink::~EtherLink()
{
- delete link1;
- delete link2;
+ delete link[0];
+ delete link[1];
- delete int1;
- delete int2;
+ delete interface[0];
+ delete interface[1];
}
-EtherLink::Interface::Interface(const std::string &name, Link *tx, Link *rx)
+EtherLink::Interface::Interface(const string &name, Link *tx, Link *rx)
: EtherInt(name), txlink(tx)
{
tx->setTxInt(this);
rx->setRxInt(this);
}
-EtherLink::Link::Link(const std::string &name, double rate, EtherDump *d)
- : objName(name), txint(NULL), rxint(NULL), ticks_per_byte(rate),
- dump(d), event(&mainEventQueue, this)
-{}
+EtherLink::Link::Link(const string &name, EtherLink *p, int num,
+ double rate, Tick delay, Tick delay_var, EtherDump *d)
+ : objName(name), parent(p), number(num), txint(NULL), rxint(NULL),
+ ticksPerByte(rate), linkDelay(delay), delayVar(delay_var), dump(d),
+ doneEvent(this)
+{ }
void
EtherLink::serialize(ostream &os)
{
- link1->serialize(os);
- link2->serialize(os);
+ link[0]->serialize("link0", os);
+ link[1]->serialize("link1", os);
}
void
EtherLink::unserialize(Checkpoint *cp, const string §ion)
{
- link1->unserialize(cp, section);
- link2->unserialize(cp, section);
+ link[0]->unserialize("link0", cp, section);
+ link[1]->unserialize("link1", cp, section);
}
+void
+EtherLink::Link::txComplete(PacketPtr packet)
+{
+ DPRINTF(Ethernet, "packet received: len=%d\n", packet->length);
+ DDUMP(EthernetData, packet->data, packet->length);
+ rxint->sendPacket(packet);
+}
+
+class LinkDelayEvent : public Event
+{
+ protected:
+ EtherLink::Link *link;
+ PacketPtr packet;
+
+ public:
+ // non-scheduling version for createForUnserialize()
+ LinkDelayEvent();
+ LinkDelayEvent(EtherLink::Link *link, PacketPtr pkt, Tick when);
+
+ void process();
+
+ virtual void serialize(ostream &os);
+ virtual void unserialize(Checkpoint *cp, const string §ion);
+ static Serializable *createForUnserialize(Checkpoint *cp,
+ const string §ion);
+};
+
void
EtherLink::Link::txDone()
{
if (dump)
dump->dump(packet);
- DPRINTF(Ethernet, "EtherLink packet received: len=%d\n", packet->length);
- DDUMP(EthernetData, packet->data, packet->length);
-
- rxint->sendPacket(packet);
+ if (linkDelay > 0) {
+ DPRINTF(Ethernet, "packet delayed: delay=%d\n", linkDelay);
+ new LinkDelayEvent(this, packet, curTick + linkDelay);
+ } else {
+ txComplete(packet);
+ }
packet = 0;
assert(!busy());
}
bool
-EtherLink::Link::transmit(PacketPtr &pkt)
+EtherLink::Link::transmit(PacketPtr pkt)
{
if (busy()) {
- DPRINTF(Ethernet, "EtherLink packet not sent, link busy\n");
+ DPRINTF(Ethernet, "packet not sent, link busy\n");
return false;
}
- DPRINTF(Ethernet, "EtherLink packet sent: len=%d\n", pkt->length);
+ DPRINTF(Ethernet, "packet sent: len=%d\n", pkt->length);
DDUMP(EthernetData, pkt->data, pkt->length);
packet = pkt;
- int delay = (int)ceil(((double)pkt->length * ticks_per_byte) + 1.0);
- DPRINTF(Ethernet, "EtherLink scheduling packet: delay=%d, (rate=%f)\n",
- delay, ticks_per_byte);
- event.schedule(curTick + delay);
+ Tick delay = (Tick)ceil(((double)pkt->length * ticksPerByte) + 1.0);
+ if (delayVar != 0) {
+ Random<Tick> var;
+ delay += var.uniform(0, delayVar);
+ }
+ DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n",
+ delay, ticksPerByte);
+ doneEvent.schedule(curTick + delay);
return true;
}
void
-EtherLink::Link::serialize(ostream &os)
-{
- bool packetExists = false;
- if (packet) packetExists = true;
- SERIALIZE_SCALAR(packetExists);
- if (packetExists) {
- nameOut(os, csprintf("%s.linkPacket", name()));
- packet->serialize(os);
- }
+EtherLink::Link::serialize(const string &base, ostream &os)
+{
+ bool packet_exists = packet;
+ paramOut(os, base + ".packet_exists", packet_exists);
+ if (packet_exists)
+ packet->serialize(base + ".packet", os);
- bool event_scheduled = event.scheduled();
- SERIALIZE_SCALAR(event_scheduled);
+ bool event_scheduled = doneEvent.scheduled();
+ paramOut(os, base + ".event_scheduled", event_scheduled);
if (event_scheduled) {
- SERIALIZE_SCALAR(event.when());
+ Tick event_time = doneEvent.when();
+ paramOut(os, base + ".event_time", event_time);
}
+
}
void
-EtherLink::Link::unserialize(Checkpoint *cp, const string §ion)
-{
- bool event_scheduled, packetExists;
- Tick eventTime;
- UNSERIALIZE_SCALAR(packetExists);
- if (packetExists) {
- packet = new EtherPacket;
- packet->unserialize(cp, csprintf("%s.linkPacket", section));
+EtherLink::Link::unserialize(const string &base, Checkpoint *cp,
+ const string §ion)
+{
+ bool packet_exists;
+ paramIn(cp, section, base + ".packet_exists", packet_exists);
+ if (packet_exists) {
+ packet = new PacketData(16384);
+ packet->unserialize(base + ".packet", cp, section);
}
- UNSERIALIZE_SCALAR(event_scheduled);
+ bool event_scheduled;
+ paramIn(cp, section, base + ".event_scheduled", event_scheduled);
if (event_scheduled) {
- UNSERIALIZE_SCALAR(eventTime);
- event.schedule(eventTime);
+ Tick event_time;
+ paramIn(cp, section, base + ".event_time", event_time);
+ doneEvent.schedule(event_time);
}
}
+LinkDelayEvent::LinkDelayEvent()
+ : Event(&mainEventQueue), link(NULL)
+{
+ setFlags(AutoSerialize);
+ setFlags(AutoDelete);
+}
+
+LinkDelayEvent::LinkDelayEvent(EtherLink::Link *l, PacketPtr p, Tick when)
+ : Event(&mainEventQueue), link(l), packet(p)
+{
+ setFlags(AutoSerialize);
+ setFlags(AutoDelete);
+ schedule(when);
+}
+
+void
+LinkDelayEvent::process()
+{
+ link->txComplete(packet);
+}
+
+void
+LinkDelayEvent::serialize(ostream &os)
+{
+ paramOut(os, "type", string("LinkDelayEvent"));
+ Event::serialize(os);
+
+ EtherLink *parent = link->parent;
+ bool number = link->number;
+ SERIALIZE_OBJPTR(parent);
+ SERIALIZE_SCALAR(number);
+
+ packet->serialize("packet", os);
+}
+
+
+void
+LinkDelayEvent::unserialize(Checkpoint *cp, const string §ion)
+{
+ Event::unserialize(cp, section);
+
+ EtherLink *parent;
+ bool number;
+ UNSERIALIZE_OBJPTR(parent);
+ UNSERIALIZE_SCALAR(number);
+
+ link = parent->link[number];
+
+ packet = new PacketData(16384);
+ packet->unserialize("packet", cp, section);
+}
+
+
+Serializable *
+LinkDelayEvent::createForUnserialize(Checkpoint *cp, const string §ion)
+{
+ return new LinkDelayEvent();
+}
+
+REGISTER_SERIALIZEABLE("LinkDelayEvent", LinkDelayEvent)
+
BEGIN_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
- SimObjectParam<EtherInt *> interface1;
- SimObjectParam<EtherInt *> interface2;
- Param<Tick> link_speed;
- SimObjectParam<EtherDump *> packet_dump;
+ SimObjectParam<EtherInt *> int1;
+ SimObjectParam<EtherInt *> int2;
+ Param<double> speed;
+ Param<Tick> delay;
+ Param<Tick> delay_var;
+ SimObjectParam<EtherDump *> dump;
END_DECLARE_SIM_OBJECT_PARAMS(EtherLink)
BEGIN_INIT_SIM_OBJECT_PARAMS(EtherLink)
- INIT_PARAM(interface1, "interface 1"),
- INIT_PARAM(interface2, "interface 2"),
- INIT_PARAM_DFLT(link_speed, "link speed in bits per second", 100000000),
- INIT_PARAM_DFLT(packet_dump, "object to dump network packets to", NULL)
+ INIT_PARAM(int1, "interface 1"),
+ INIT_PARAM(int2, "interface 2"),
+ INIT_PARAM(speed, "link speed in bits per second"),
+ INIT_PARAM(delay, "transmit delay of packets in us"),
+ INIT_PARAM(delay_var, "Difference in amount of time to traverse wire"),
+ INIT_PARAM(dump, "object to dump network packets to")
END_INIT_SIM_OBJECT_PARAMS(EtherLink)
CREATE_SIM_OBJECT(EtherLink)
{
- return new EtherLink(getInstanceName(), interface1, interface2, link_speed,
- packet_dump);
+ return new EtherLink(getInstanceName(), int1, int2, speed, delay, delay_var,
+ dump);
}
REGISTER_SIM_OBJECT("EtherLink", EtherLink)
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