gem5/src/mem/ruby/profiler/CacheProfiler.cc

/*
 * Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
 * 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.
 */

/*
 * CacheProfiler.C
 *
 * Description: See CacheProfiler.hh
 *
 * $Id$
 *
 */

#include "mem/ruby/profiler/CacheProfiler.hh"
#include "mem/ruby/profiler/AccessTraceForAddress.hh"
#include "mem/gems_common/PrioHeap.hh"
#include "mem/ruby/system/System.hh"
#include "mem/ruby/profiler/Profiler.hh"
#include "mem/gems_common/Vector.hh"

CacheProfiler::CacheProfiler(const string& description)
{
  m_description = description;
  m_requestTypeVec_ptr = new Vector<int>;
  m_requestTypeVec_ptr->setSize(int(CacheRequestType_NUM));

  clearStats();
}

CacheProfiler::~CacheProfiler()
{
  delete m_requestTypeVec_ptr;
}

void CacheProfiler::printStats(ostream& out) const
{
  out << "Cache Stats: " << m_description << endl;
  string description = "  " + m_description;

  out << description << "_total_misses: " << m_misses << endl;
  out << description << "_total_demand_misses: " << m_demand_misses << endl;
  out << description << "_total_prefetches: " << m_prefetches << endl;
  out << description << "_total_sw_prefetches: " << m_sw_prefetches << endl;
  out << description << "_total_hw_prefetches: " << m_hw_prefetches << endl;
  out << endl;

  int requests = 0;

  for(int i=0; i<int(CacheRequestType_NUM); i++) {
    requests += m_requestTypeVec_ptr->ref(i);
  }

  assert(m_misses == requests);

  if (requests > 0) {
    for(int i=0; i<int(CacheRequestType_NUM); i++){
      if (m_requestTypeVec_ptr->ref(i) > 0) {
        out << description << "_request_type_" << CacheRequestType_to_string(CacheRequestType(i)) << ":   "
            << (100.0 * double((m_requestTypeVec_ptr->ref(i)))) / double(requests)
            << "%" << endl;
      }
    }

    out << endl;

    for(int i=0; i<AccessModeType_NUM; i++){
      if (m_accessModeTypeHistogram[i] > 0) {
        out << description << "_access_mode_type_" << (AccessModeType) i << ":   " << m_accessModeTypeHistogram[i]
            << "    " << (100.0 * m_accessModeTypeHistogram[i]) / requests << "%" << endl;
      }
    }
  }

  out << description << "_request_size: " << m_requestSize << endl;
  out << endl;

}

void CacheProfiler::clearStats()
{
  for(int i=0; i<int(CacheRequestType_NUM); i++) {
    m_requestTypeVec_ptr->ref(i) = 0;
  }
  m_requestSize.clear();
  m_misses = 0;
  m_demand_misses = 0;
  m_prefetches = 0;
  m_sw_prefetches = 0;
  m_hw_prefetches = 0;
  for(int i=0; i<AccessModeType_NUM; i++){
    m_accessModeTypeHistogram[i] = 0;
  }
}

void CacheProfiler::addStatSample(CacheRequestType requestType, AccessModeType type, int msgSize, PrefetchBit pfBit)
{
  m_misses++;

  m_requestTypeVec_ptr->ref(requestType)++;

  m_accessModeTypeHistogram[type]++;
  m_requestSize.add(msgSize);
  if (pfBit == PrefetchBit_No) {
    m_demand_misses++;
  } else if (pfBit == PrefetchBit_Yes) {
    m_prefetches++;
    m_sw_prefetches++;
  } else { // must be L1_HW || L2_HW prefetch
    m_prefetches++;
    m_hw_prefetches++;
  }
}