activity.hh

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/*
 * Copyright (c) 2006 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: Kevin Lim
 */

#ifndef __CPU_ACTIVITY_HH__
#define __CPU_ACTIVITY_HH__

#include "base/trace.hh"
#include "cpu/timebuf.hh"

class ActivityRecorder
{
  public:
    ActivityRecorder(const std::string &name, int num_stages,
                     int longest_latency, int count);
    ~ActivityRecorder();

    void activity();

    void advance();

    void activateStage(const int idx);

    void deactivateStage(const int idx);

    bool getStageActive(const int idx) const { return stageActive[idx]; }

    int getNumStages() const { return numStages; }

    int getActivityCount() const { return activityCount; }

    void setActivityCount(int count)
    { activityCount = count; }

    bool active() { return activityCount; }

    void reset();

    void dump();

    void validate();

    const std::string &name() const { return _name; }

  private:
    // provide name() for DPRINTF.
    std::string _name;

    TimeBuffer<bool> activityBuffer;

    int longestLatency;

    int activityCount;

    int numStages;

    bool *stageActive;
};

#endif // __CPU_ACTIVITY_HH__