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/*
* Copyright (c) 2012-2014 ARM Limited
* All rights reserved.
*
* The license below extends only to copyright in the software and shall
* not be construed as granting a license to any other intellectual
* property including but not limited to intellectual property relating
* to a hardware implementation of the functionality of the software
* licensed hereunder. You may use the software subject to the license
* terms below provided that you ensure that this notice is replicated
* unmodified and in its entirety in all distributions of the software,
* modified or unmodified, in source code or in binary form.
*
* 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: Dam Sunwoo
* Curtis Dunham
*/
#include "base/output.hh"
#include "cpu/simple/probes/simpoint.hh"
SimPoint::SimPoint(const SimPointParams *p)
: ProbeListenerObject(p),
intervalSize(p->interval),
intervalCount(0),
intervalDrift(0),
simpointStream(NULL),
currentBBV(0, 0),
currentBBVInstCount(0)
{
simpointStream = simout.create(p->profile_file, false);
if (!simpointStream)
fatal("unable to open SimPoint profile_file");
}
SimPoint::~SimPoint()
{
simout.close(simpointStream);
}
void
SimPoint::init()
{}
void
SimPoint::regProbeListeners()
{
typedef ProbeListenerArg<SimPoint, std::pair<SimpleThread*,StaticInstPtr>>
SimPointListener;
listeners.push_back(new SimPointListener(this, "Commit",
&SimPoint::profile));
}
void
SimPoint::profile(const std::pair<SimpleThread*, StaticInstPtr>& p)
{
SimpleThread* thread = p.first;
const StaticInstPtr &inst = p.second;
if (!currentBBVInstCount)
currentBBV.first = thread->pcState().instAddr();
++intervalCount;
++currentBBVInstCount;
// If inst is control inst, assume end of basic block.
if (inst->isControl()) {
currentBBV.second = thread->pcState().instAddr();
auto map_itr = bbMap.find(currentBBV);
if (map_itr == bbMap.end()){
// If a new (previously unseen) basic block is found,
// add a new unique id, record num of insts and insert into bbMap.
BBInfo info;
info.id = bbMap.size() + 1;
info.insts = currentBBVInstCount;
info.count = currentBBVInstCount;
bbMap.insert(std::make_pair(currentBBV, info));
} else {
// If basic block is seen before, just increment the count by the
// number of insts in basic block.
BBInfo& info = map_itr->second;
info.count += currentBBVInstCount;
}
currentBBVInstCount = 0;
// Reached end of interval if the sum of the current inst count
// (intervalCount) and the excessive inst count from the previous
// interval (intervalDrift) is greater than/equal to the interval size.
if (intervalCount + intervalDrift >= intervalSize) {
// summarize interval and display BBV info
std::vector<std::pair<uint64_t, uint64_t> > counts;
for (auto map_itr = bbMap.begin(); map_itr != bbMap.end();
++map_itr) {
BBInfo& info = map_itr->second;
if (info.count != 0) {
counts.push_back(std::make_pair(info.id, info.count));
info.count = 0;
}
}
std::sort(counts.begin(), counts.end());
// Print output BBV info
*simpointStream << "T";
for (auto cnt_itr = counts.begin(); cnt_itr != counts.end();
++cnt_itr) {
*simpointStream << ":" << cnt_itr->first
<< ":" << cnt_itr->second << " ";
}
*simpointStream << "\n";
intervalDrift = (intervalCount + intervalDrift) - intervalSize;
intervalCount = 0;
}
}
}
/** SimPoint SimObject */
SimPoint*
SimPointParams::create()
{
return new SimPoint(this);
}
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