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/*
* 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
* 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: Nathan Binkert
*/
#include <string>
#include "base/callback.hh"
#include "base/hostinfo.hh"
#include "sim/eventq.hh"
#include "sim/sim_events.hh"
#include "sim/sim_exit.hh"
#include "sim/startup.hh"
#include "sim/stats.hh"
using namespace std;
SimLoopExitEvent::SimLoopExitEvent(const std::string &_cause, int c, Tick r)
: Event(Sim_Exit_Pri), cause(_cause), code(c), repeat(r)
{
setFlags(IsExitEvent);
}
//
// handle termination event
//
void
SimLoopExitEvent::process()
{
// if this got scheduled on a different queue (e.g. the committed
// instruction queue) then make a corresponding event on the main
// queue.
if (!getFlags(IsMainQueue)) {
exitSimLoop(cause, code);
delete this;
}
// otherwise do nothing... the IsExitEvent flag takes care of
// exiting the simulation loop and returning this object to Python
// but if you are doing this on intervals, don't forget to make another
if (repeat) {
assert(getFlags(IsMainQueue));
mainEventQueue.schedule(this, curTick + repeat);
}
}
const char *
SimLoopExitEvent::description() const
{
return "simulation loop exit";
}
void
exitSimLoop(const std::string &message, int exit_code)
{
Event *event = new SimLoopExitEvent(message, exit_code);
mainEventQueue.schedule(event, curTick);
}
CountedDrainEvent::CountedDrainEvent()
: SimLoopExitEvent("Finished drain", 0), count(0)
{ }
void
CountedDrainEvent::process()
{
if (--count == 0)
exitSimLoop(cause, code);
}
//
// constructor: automatically schedules at specified time
//
CountedExitEvent::CountedExitEvent(const std::string &_cause, int &counter)
: Event(Sim_Exit_Pri), cause(_cause), downCounter(counter)
{
// catch stupid mistakes
assert(downCounter > 0);
}
//
// handle termination event
//
void
CountedExitEvent::process()
{
if (--downCounter == 0) {
exitSimLoop(cause, 0);
}
}
const char *
CountedExitEvent::description() const
{
return "counted exit";
}
CheckSwapEvent::CheckSwapEvent(int ival)
: interval(ival)
{
mainEventQueue.schedule(this, curTick + interval);
}
void
CheckSwapEvent::process()
{
/* Check the amount of free swap space */
long swap;
/* returns free swap in KBytes */
swap = procInfo("/proc/meminfo", "SwapFree:");
if (swap < 1000)
ccprintf(cerr, "\a\a\aWarning! Swap space is low (%d)\n", swap);
if (swap < 100) {
cerr << "\a\aAborting Simulation! Inadequate swap space!\n\n";
exitSimLoop("Lack of swap space");
}
assert(getFlags(IsMainQueue));
mainEventQueue.schedule(this, curTick + interval);
}
const char *
CheckSwapEvent::description() const
{
return "check swap";
}
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