ticked_object.cc

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#include "sim/ticked_object.hh"
 
#include "params/TickedObject.hh"
#include "sim/clocked_object.hh"
#include "sim/serialize.hh"
 
namespace gem5
{
 
Ticked::Ticked(ClockedObject &object_,
    statistics::Scalar *imported_num_cycles,
    Event::Priority priority) :
    object(object_),
    event([this]{ processClockEvent(); }, object_.name(), false, priority),
    running(false),
    lastStopped(0),
    /* Allocate numCycles if an external stat wasn't passed in */
    numCyclesLocal((imported_num_cycles ? NULL : new statistics::Scalar)),
    numCycles((imported_num_cycles ? *imported_num_cycles :
        *numCyclesLocal))
{ }
 
void
Ticked::processClockEvent() {
    ++tickCycles;
    ++numCycles;
    countCycles(Cycles(1));
    evaluate();
    if (running)
        object.schedule(event, object.clockEdge(Cycles(1)));
}
 
void
Ticked::regStats()
{
    if (numCyclesLocal) {
        numCycles
            .name(object.name() + ".totalTickCycles")
            .desc("Number of cycles that the object ticked or was stopped");
    }
 
    tickCycles
        .name(object.name() + ".tickCycles")
        .desc("Number of cycles that the object actually ticked");
 
    idleCycles
        .name(object.name() + ".idleCycles")
        .desc("Total number of cycles that the object has spent stopped");
    idleCycles = numCycles - tickCycles;
}
 
void
Ticked::serialize(CheckpointOut &cp) const
{
    uint64_t lastStoppedUint = lastStopped;
 
    paramOut(cp, "lastStopped", lastStoppedUint);
}
 
void
Ticked::unserialize(CheckpointIn &cp)
{
    uint64_t lastStoppedUint = 0;
 
    /* lastStopped is optional on checkpoint restore as this object may be
     *  being restored from one which has a common base (and so possibly
     *  many common checkpointed values) but where Ticked is used in the
     *  checkpointed object but not this one.
     *  An example would be a CPU model using Ticked restores from a
     *  simple CPU without without Ticked */
    optParamIn(cp, "lastStopped", lastStoppedUint);
 
    lastStopped = Cycles(lastStoppedUint);
}
 
TickedObject::TickedObject(const TickedObjectParams &params,
    Event::Priority priority) :
    ClockedObject(params),
    /* Make numCycles in Ticked */
    Ticked(*this, NULL, priority)
{ }
 
void
TickedObject::regStats()
{
    Ticked::regStats();
    ClockedObject::regStats();
}
 
void
TickedObject::serialize(CheckpointOut &cp) const
{
    Ticked::serialize(cp);
    ClockedObject::serialize(cp);
}
void
TickedObject::unserialize(CheckpointIn &cp)
{
    Ticked::unserialize(cp);
    ClockedObject::unserialize(cp);
}
 
} // namespace gem5