stat_control.cc

M5,一个功能强大的多处理器系统模拟器.很多针对处理器架构,性能的研究都使用它作为模拟平台

/*
 * Copyright (c) 2004, 2005
 * The Regents of The University of Michigan
 * All Rights Reserved
 *
 * This code is part of the M5 simulator.
 *
 * Permission is granted to use, copy, create derivative works and
 * redistribute this software and such derivative works for any
 * purpose, so long as the copyright notice above, this grant of
 * permission, and the disclaimer below appear in all copies made; and
 * so long as the name of The University of Michigan is not used in
 * any advertising or publicity pertaining to the use or distribution
 * of this software without specific, written prior authorization.
 *
 * THIS SOFTWARE IS PROVIDED AS IS, WITHOUT REPRESENTATION FROM THE
 * UNIVERSITY OF MICHIGAN AS TO ITS FITNESS FOR ANY PURPOSE, AND
 * WITHOUT WARRANTY BY THE UNIVERSITY OF MICHIGAN OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE. THE REGENTS OF THE UNIVERSITY OF MICHIGAN SHALL NOT BE
 * LIABLE FOR ANY DAMAGES, INCLUDING DIRECT, SPECIAL, INDIRECT,
 * INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WITH RESPECT TO ANY CLAIM
 * ARISING OUT OF OR IN CONNECTION WITH THE USE OF THE SOFTWARE, EVEN
 * IF IT HAS BEEN OR IS HEREAFTER ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGES.
 *
 * Authors: Nathan L. Binkert
 */

// This file will contain default statistics for the simulator that
// don't really belong to a specific simulator object

#include <fstream>
#include <iostream>
#include <list>

#include "base/callback.hh"
#include "base/hostinfo.hh"
#include "base/statistics.hh"
#include "base/time.hh"
#include "cpu/base.hh"
#include "sim/eventq.hh"

using namespace std;

Stats::Formula hostInstRate;
Stats::Formula hostTickRate;
Stats::Value hostMemory;
Stats::Value hostSeconds;

Stats::Value simTicks;
Stats::Value simInsts;
Stats::Value simFreq;
Stats::Formula simSeconds;

namespace Stats {

Time statTime(true);
Tick startTick;

struct SimTicksReset : public Callback
{
    void process()
    {
        statTime.set();
        startTick = curTick;
    }
};

double
statElapsedTime()
{
    Time now(true);
    Time elapsed = now - statTime;
    return elapsed();
}

Tick
statElapsedTicks()
{
    return curTick - startTick;
}

SimTicksReset simTicksReset;

void
initSimStats()
{
    simInsts
        .functor(BaseCPU::numSimulatedInstructions)
        .name("sim_insts")
        .desc("Number of instructions simulated")
        .precision(0)
        .prereq(simInsts)
        ;

    simSeconds
        .name("sim_seconds")
        .desc("Number of seconds simulated")
        ;

    simFreq
        .scalar(Clock::Frequency)
        .name("sim_freq")
        .desc("Frequency of simulated ticks")
        ;

    simTicks
        .functor(statElapsedTicks)
        .name("sim_ticks")
        .desc("Number of ticks simulated")
        ;

    hostInstRate
        .name("host_inst_rate")
        .desc("Simulator instruction rate (inst/s)")
        .precision(0)
        .prereq(simInsts)
        ;

    hostMemory
        .functor(memUsage)
        .name("host_mem_usage")
        .desc("Number of bytes of host memory used")
        .prereq(hostMemory)
        ;

    hostSeconds
        .functor(statElapsedTime)
        .name("host_seconds")
        .desc("Real time elapsed on the host")
        .precision(2)
        ;

    hostTickRate
        .name("host_tick_rate")
        .desc("Simulator tick rate (ticks/s)")
        .precision(0)
        ;

    simSeconds = simTicks / simFreq;
    hostInstRate = simInsts / hostSeconds;
    hostTickRate = simTicks / hostSeconds;

    registerResetCallback(&simTicksReset);
}

class _StatEvent : public Event
{
  private:
    bool dump;
    bool reset;
    Tick repeat;

  public:
    _StatEvent(bool _dump, bool _reset, Tick _when, Tick _repeat)
        : Event(&mainEventQueue, Stat_Event_Pri), dump(_dump), reset(_reset),
          repeat(_repeat)
    {
        setFlags(AutoDelete);
        schedule(_when);
    }

    virtual void
    process()
    {
        if (dump)
            Stats::dump();

        if (reset)
            Stats::reset();

        if (repeat)
            new _StatEvent(dump, reset, curTick + repeat, repeat);
    }
};

void
StatEvent(bool dump, bool reset, Tick when, Tick repeat)
{
    new _StatEvent(dump, reset, when, repeat);
}

/* namespace Stats */ }