simpoint.cc revision 10381:ab8b8601b6ff 
1/*
2 * Copyright (c) 2012-2014 ARM Limited
3 * All rights reserved.
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder.  You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated
11 * unmodified and in its entirety in all distributions of the software,
12 * modified or unmodified, in source code or in binary form.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions are
16 * met: redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer;
18 * redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution;
21 * neither the name of the copyright holders nor the names of its
22 * contributors may be used to endorse or promote products derived from
23 * this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 *
37 * Authors: Dam Sunwoo
38 *          Curtis Dunham
39 */
40
41#include "base/output.hh"
42#include "cpu/simple/probes/simpoint.hh"
43
44SimPoint::SimPoint(const SimPointParams *p)
45    : ProbeListenerObject(p),
46      intervalSize(p->interval),
47      intervalCount(0),
48      intervalDrift(0),
49      simpointStream(NULL),
50      currentBBV(0, 0),
51      currentBBVInstCount(0)
52{
53    simpointStream = simout.create(p->profile_file, false);
54    if (!simpointStream)
55        fatal("unable to open SimPoint profile_file");
56}
57
58SimPoint::~SimPoint()
59{
60    simout.close(simpointStream);
61}
62
63void
64SimPoint::init()
65{}
66
67void
68SimPoint::regProbeListeners()
69{
70    typedef ProbeListenerArg<SimPoint, std::pair<SimpleThread*,StaticInstPtr>>
71        SimPointListener;
72    listeners.push_back(new SimPointListener(this, "Commit",
73                                             &SimPoint::profile));
74}
75
76void
77SimPoint::profile(const std::pair<SimpleThread*, StaticInstPtr>& p)
78{
79    SimpleThread* thread = p.first;
80    StaticInstPtr inst = p.second;
81
82    if (!currentBBVInstCount)
83        currentBBV.first = thread->pcState().instAddr();
84
85    ++intervalCount;
86    ++currentBBVInstCount;
87
88    // If inst is control inst, assume end of basic block.
89    if (inst->isControl()) {
90        currentBBV.second = thread->pcState().instAddr();
91
92        auto map_itr = bbMap.find(currentBBV);
93        if (map_itr == bbMap.end()){
94            // If a new (previously unseen) basic block is found,
95            // add a new unique id, record num of insts and insert into bbMap.
96            BBInfo info;
97            info.id = bbMap.size() + 1;
98            info.insts = currentBBVInstCount;
99            info.count = currentBBVInstCount;
100            bbMap.insert(std::make_pair(currentBBV, info));
101        } else {
102            // If basic block is seen before, just increment the count by the
103            // number of insts in basic block.
104            BBInfo& info = map_itr->second;
105            info.count += currentBBVInstCount;
106        }
107        currentBBVInstCount = 0;
108
109        // Reached end of interval if the sum of the current inst count
110        // (intervalCount) and the excessive inst count from the previous
111        // interval (intervalDrift) is greater than/equal to the interval size.
112        if (intervalCount + intervalDrift >= intervalSize) {
113            // summarize interval and display BBV info
114            std::vector<std::pair<uint64_t, uint64_t> > counts;
115            for (auto map_itr = bbMap.begin(); map_itr != bbMap.end();
116                    ++map_itr) {
117                BBInfo& info = map_itr->second;
118                if (info.count != 0) {
119                    counts.push_back(std::make_pair(info.id, info.count));
120                    info.count = 0;
121                }
122            }
123            std::sort(counts.begin(), counts.end());
124
125            // Print output BBV info
126            *simpointStream << "T";
127            for (auto cnt_itr = counts.begin(); cnt_itr != counts.end();
128                    ++cnt_itr) {
129                *simpointStream << ":" << cnt_itr->first
130                                << ":" << cnt_itr->second << " ";
131            }
132            *simpointStream << "\n";
133
134            intervalDrift = (intervalCount + intervalDrift) - intervalSize;
135            intervalCount = 0;
136        }
137    }
138}
139
140/** SimPoint SimObject */
141SimPoint*
142SimPointParams::create()
143{
144    return new SimPoint(this);
145}
146