gem5/sim/eventq.cc
Nathan Binkert 667cbb6690 Implement more m5 pseduo opcodes:
resetstats
dumpstats
dumpresetstats
m5checkpoint

Lots of cleanup of serialization and stats dumping/resetting to
work with these new instructions

arch/alpha/isa_desc:
    Implement more m5 pseduo opcodes:
    resetstats
    dumpstats
    dumpresetstats
    m5checkpoint

    All of these functions take two optional parameters, the first is a delay,
    and the second is a period.  The delay tells the simulator to wait the
    specified number of nanoseconds before triggering the event, the period
    tells the simulator to repeat the event with a specified frequency
base/statistics.cc:
base/statistics.hh:
    regReset RegResetCallback
dev/disk_image.cc:
    serializeFilename -> CheckpointFile()
sim/debug.cc:
    Move this debugging statement to sim_stats.cc
sim/eventq.cc:
    Don't AutoDelete an event if it is scheduled since the process()
    function could potentially schedule the event again.
sim/main.cc:
    DumpStatsEvent is now Statistics::SetupEvent(Dump, curTick)
sim/serialize.cc:
    Change the serialize event so that it's possible to cause the
    event to repeat.  Also make the priority such that the event
    happens just before the simulator would exit if both events
    were scheduled for the same cycle.

    get rid of the serializeFilename variable and provide a CheckpointFile()
    function.  This function takes a basename that is set in the
    configuration, and appends the current cycle to the name so that
    multiple checkpoints can be dumped from the same simulation.

    Also, don't exit the simulation when a checkpoint file is dumped.
sim/serialize.hh:
    serializeFilename -> CheckpointFile()
    SetupCheckpoint function to tell the simulator to prepare
    to checkpoint at a certain time with a certain period
sim/sim_events.cc:
    DumpStatsEvent stuff gets move to sim_stats.(cc|hh)
    The context stuff gets moved into the already existing
    stats context in stat_context.cc
sim/sim_events.hh:
    DumpStatsEvent stuff gets move to sim_stats.(cc|hh)
sim/universe.cc:
    Provide some simple functions for converting times into
    ticks.  These use floating point math to get as close as
    possible to the real values.  Multipliers are set up ahead
    of time

--HG--
extra : convert_revision : d06ef26a9237529a1e5060cb1ac2dcc04d4ec252
2003-11-02 18:02:58 -05:00

250 lines
6.5 KiB
C++

/*
* Copyright (c) 2003 The Regents of The University of Michigan
* 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.
*/
#include <assert.h>
#include <iostream>
#include <string>
#include <sstream>
#include <vector>
#include "cpu/full_cpu/smt.hh"
#include "base/misc.hh"
#include "sim/eventq.hh"
#include "base/trace.hh"
#include "sim/universe.hh"
using namespace std;
//
// Main Event Queue
//
// Events on this queue are processed at the *beginning* of each
// cycle, before the pipeline simulation is performed.
//
EventQueue mainEventQueue("MainEventQueue");
void
EventQueue::insert(Event *event)
{
if (head == NULL || event->when() < head->when() ||
(event->when() == head->when() &&
event->priority() <= head->priority())) {
event->next = head;
head = event;
} else {
Event *prev = head;
Event *curr = head->next;
while (curr) {
if (event->when() <= curr->when() &&
(event->when() < curr->when() ||
event->priority() <= curr->priority()))
break;
prev = curr;
curr = curr->next;
}
event->next = curr;
prev->next = event;
}
}
void
EventQueue::remove(Event *event)
{
if (head == NULL)
return;
if (head == event){
head = event->next;
return;
}
Event *prev = head;
Event *curr = head->next;
while (curr && curr != event) {
prev = curr;
curr = curr->next;
}
if (curr == event)
prev->next = curr->next;
}
void
EventQueue::serviceOne()
{
Event *event = head;
event->clearFlags(Event::Scheduled);
head = event->next;
// handle action
if (!event->squashed())
event->process();
else
event->clearFlags(Event::Squashed);
if (event->getFlags(Event::AutoDelete) && !event->scheduled())
delete event;
}
void
Event::serialize(std::ostream &os)
{
SERIALIZE_SCALAR(_when);
SERIALIZE_SCALAR(_priority);
SERIALIZE_ENUM(_flags);
}
void
Event::unserialize(Checkpoint *cp, const string &section)
{
if (scheduled())
deschedule();
UNSERIALIZE_SCALAR(_when);
UNSERIALIZE_SCALAR(_priority);
// 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 *event = head;
while (event) {
if (event->getFlags(Event::AutoSerialize)) {
eventPtrs.push_back(event);
paramOut(os, csprintf("event%d", numEvents++), event->name());
}
event = event->next;
}
SERIALIZE_SCALAR(numEvents);
for (std::list<Event *>::iterator it=eventPtrs.begin();
it != eventPtrs.end(); ++it) {
(*it)->nameOut(os);
(*it)->serialize(os);
}
}
void
EventQueue::unserialize(Checkpoint *cp, const std::string &section)
{
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
Serializeable::create(cp, eventName);
}
}
void
EventQueue::dump()
{
cprintf("============================================================\n");
cprintf("EventQueue Dump (cycle %d)\n", curTick);
cprintf("------------------------------------------------------------\n");
if (empty())
cprintf("<No Events>\n");
else {
Event *event = head;
while (event) {
event->dump();
event = event->next;
}
}
cprintf("============================================================\n");
}
const char *
Event::description()
{
return "generic";
}
#if TRACING_ON
void
Event::trace(const char *action)
{
// This DPRINTF is unconditional because calls to this function
// are protected by an 'if (DTRACE(Event))' in the inlined Event
// methods.
//
// This is just a default implementation for derived classes where
// it's not worth doing anything special. If you want to put a
// more informative message in the trace, override this method on
// the particular subclass where you have the information that
// needs to be printed.
DPRINTFN("%s event %s @ %d\n", description(), action, when());
}
#endif
void
Event::dump()
{
#if TRACING_ON
cprintf(" Created: %d\n", when_created);
#endif
if (scheduled()) {
#if TRACING_ON
cprintf(" Scheduled at %d\n", when_scheduled);
#endif
cprintf(" Scheduled for %d\n", when());
}
else {
cprintf(" Not Scheduled\n");
}
}