/*
* Copyright (c) 2000-2005 The Regents of The University of Michigan
* Copyright (c) 2008 The Hewlett-Packard Development Company
+ * Copyright (c) 2013 Advanced Micro Devices, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include <cassert>
#include <iostream>
#include <string>
+#include <unordered_map>
#include <vector>
-#include "base/hashmap.hh"
#include "base/misc.hh"
#include "base/trace.hh"
#include "cpu/smt.hh"
+#include "debug/Checkpoint.hh"
#include "sim/core.hh"
-#include "sim/eventq.hh"
+#include "sim/eventq_impl.hh"
using namespace std;
+Tick simQuantum = 0;
+
//
-// Main Event Queue
+// Main Event Queues
//
-// Events on this queue are processed at the *beginning* of each
+// Events on these queues are processed at the *beginning* of each
// cycle, before the pipeline simulation is performed.
//
-EventQueue mainEventQueue("MainEventQueue");
+uint32_t numMainEventQueues = 0;
+vector<EventQueue *> mainEventQueue;
+__thread EventQueue *_curEventQueue = NULL;
+bool inParallelMode = false;
+
+EventQueue *
+getEventQueue(uint32_t index)
+{
+ while (numMainEventQueues <= index) {
+ numMainEventQueues++;
+ mainEventQueue.push_back(
+ new EventQueue(csprintf("MainEventQueue-%d", index)));
+ }
+
+ return mainEventQueue[index];
+}
#ifndef NDEBUG
Counter Event::instanceCounter = 0;
#endif
+Event::~Event()
+{
+ assert(!scheduled());
+ flags = 0;
+}
+
+const std::string
+Event::name() const
+{
+#ifndef NDEBUG
+ return csprintf("Event_%d", instance);
+#else
+ return csprintf("Event_%x", (uintptr_t)this);
+#endif
+}
+
+
Event *
Event::insertBefore(Event *event, Event *curr)
{
if (head == NULL)
panic("event not found!");
+ assert(event->queue == this);
+
// deal with an event on the head's 'in bin' list (event has the same
// time as the head)
if (*head == *event) {
Event *
EventQueue::serviceOne()
{
+ std::lock_guard<EventQueue> lock(*this);
Event *event = head;
Event *next = head->nextInBin;
- event->clearFlags(Event::Scheduled);
+ event->flags.clear(Event::Scheduled);
if (next) {
// update the next bin pointer since it could be stale
// handle action
if (!event->squashed()) {
+ // forward current cycle to the time when this event occurs.
+ setCurTick(event->when());
+
event->process();
if (event->isExitEvent()) {
- assert(!event->getFlags(Event::AutoDelete)); // would be silly
+ assert(!event->flags.isSet(Event::Managed) ||
+ !event->flags.isSet(Event::IsMainQueue)); // would be silly
return event;
}
} else {
- event->clearFlags(Event::Squashed);
+ event->flags.clear(Event::Squashed);
}
- if (event->getFlags(Event::AutoDelete) && !event->scheduled())
- delete event;
+ event->release();
return NULL;
}
void
-Event::serialize(std::ostream &os)
+Event::serialize(CheckpointOut &cp) const
{
SERIALIZE_SCALAR(_when);
SERIALIZE_SCALAR(_priority);
- SERIALIZE_ENUM(_flags);
+ short _flags = flags;
+ SERIALIZE_SCALAR(_flags);
}
void
-Event::unserialize(Checkpoint *cp, const string §ion)
+Event::unserialize(CheckpointIn &cp)
{
- if (scheduled())
- deschedule();
+ assert(!scheduled());
UNSERIALIZE_SCALAR(_when);
UNSERIALIZE_SCALAR(_priority);
+ FlagsType _flags;
+ UNSERIALIZE_SCALAR(_flags);
+
+ // Old checkpoints had no concept of the Initialized flag
+ // so restoring from old checkpoints always fail.
+ // Events are initialized on construction but original code
+ // "flags = _flags" would just overwrite the initialization.
+ // So, read in the checkpoint flags, but then set the Initialized
+ // flag on top of it in order to avoid failures.
+ assert(initialized());
+ flags = _flags;
+ flags.set(Initialized);
+
// need to see if original event was in a scheduled, unsquashed
// state, but don't want to restore those flags in the current
// object itself (since they aren't immediately true)
- UNSERIALIZE_ENUM(_flags);
- bool wasScheduled = (_flags & Scheduled) && !(_flags & Squashed);
- _flags &= ~(Squashed | Scheduled);
-
- if (wasScheduled) {
- DPRINTF(Config, "rescheduling at %d\n", _when);
- schedule(_when);
- }
-}
-
-void
-EventQueue::serialize(ostream &os)
-{
- std::list<Event *> eventPtrs;
-
- int numEvents = 0;
- Event *nextBin = head;
- while (nextBin) {
- Event *nextInBin = nextBin;
-
- while (nextInBin) {
- if (nextInBin->getFlags(Event::AutoSerialize)) {
- eventPtrs.push_back(nextInBin);
- paramOut(os, csprintf("event%d", numEvents++),
- nextInBin->name());
- }
- nextInBin = nextInBin->nextInBin;
- }
-
- nextBin = nextBin->nextBin;
- }
-
- SERIALIZE_SCALAR(numEvents);
-
- for (std::list<Event *>::iterator it = eventPtrs.begin();
- it != eventPtrs.end(); ++it) {
- (*it)->nameOut(os);
- (*it)->serialize(os);
+ if (flags.isSet(Scheduled) && !flags.isSet(Squashed)) {
+ flags.clear(Squashed | Scheduled);
+ } else {
+ DPRINTF(Checkpoint, "Event '%s' need to be scheduled @%d\n",
+ name(), _when);
}
}
void
-EventQueue::unserialize(Checkpoint *cp, const std::string §ion)
+EventQueue::checkpointReschedule(Event *event)
{
- int numEvents;
- UNSERIALIZE_SCALAR(numEvents);
-
- std::string eventName;
- for (int i = 0; i < numEvents; i++) {
- // get the pointer value associated with the event
- paramIn(cp, section, csprintf("event%d", i), eventName);
-
- // create the event based on its pointer value
- Serializable::create(cp, eventName);
- }
+ // It's safe to call insert() directly here since this method
+ // should only be called when restoring from a checkpoint (which
+ // happens before thread creation).
+ if (event->flags.isSet(Event::Scheduled))
+ insert(event);
}
-
void
EventQueue::dump() const
{
cprintf("============================================================\n");
- cprintf("EventQueue Dump (cycle %d)\n", curTick);
+ cprintf("EventQueue Dump (cycle %d)\n", curTick());
cprintf("------------------------------------------------------------\n");
if (empty())
bool
EventQueue::debugVerify() const
{
- m5::hash_map<long, bool> map;
+ std::unordered_map<long, bool> map;
Tick time = 0;
short priority = 0;
return true;
}
+Event*
+EventQueue::replaceHead(Event* s)
+{
+ Event* t = head;
+ head = s;
+ return t;
+}
+
void
dumpMainQueue()
{
- mainEventQueue.dump();
+ for (uint32_t i = 0; i < numMainEventQueues; ++i) {
+ mainEventQueue[i]->dump();
+ }
}
Event::dump() const
{
cprintf("Event %s (%s)\n", name(), description());
- cprintf("Flags: %#x\n", _flags);
+ cprintf("Flags: %#x\n", flags);
#ifdef EVENTQ_DEBUG
cprintf("Created: %d\n", whenCreated);
#endif
cprintf("Not Scheduled\n");
}
}
+
+EventQueue::EventQueue(const string &n)
+ : objName(n), head(NULL), _curTick(0)
+{
+}
+
+void
+EventQueue::asyncInsert(Event *event)
+{
+ async_queue_mutex.lock();
+ async_queue.push_back(event);
+ async_queue_mutex.unlock();
+}
+
+void
+EventQueue::handleAsyncInsertions()
+{
+ assert(this == curEventQueue());
+ async_queue_mutex.lock();
+
+ while (!async_queue.empty()) {
+ insert(async_queue.front());
+ async_queue.pop_front();
+ }
+
+ async_queue_mutex.unlock();
+}
projects / gem5.git / blobdiff