summaryrefslogtreecommitdiff
path: root/src/mem/probes/mem_footprint.cc
blob: 0c14389edc40c8b22fe37539bbb27554c6973c46 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
/*
 * Copyright (c) 2016 Google Inc.
 * 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: Rahul Thakur
 */

#include "mem/probes/mem_footprint.hh"

#include "base/intmath.hh"
#include "params/MemFootprintProbe.hh"

MemFootprintProbe::MemFootprintProbe(MemFootprintProbeParams *p)
    : BaseMemProbe(p),
      cacheLineSizeLg2(floorLog2(p->system->cacheLineSize())),
      pageSizeLg2(floorLog2(p->page_size)),
      totalCacheLinesInMem(p->system->memSize() / p->system->cacheLineSize()),
      totalPagesInMem(p->system->memSize() / p->page_size),
      cacheLines(),
      cacheLinesAll(),
      pages(),
      pagesAll(),
      system(p->system)
{
    fatal_if(!isPowerOf2(system->cacheLineSize()),
             "MemFootprintProbe expects cache line size is power of 2.");
    fatal_if(!isPowerOf2(p->page_size),
             "MemFootprintProbe expects page size parameter is power of 2");
}

void
MemFootprintProbe::regStats()
{
    BaseMemProbe::regStats();

    using namespace Stats;
    // clang-format off
    fpCacheLine.name(name() + ".cacheline")
        .desc("Memory footprint at cache line granularity")
        .flags(nozero | nonan);
    fpCacheLineTotal.name(name() + ".cacheline_total")
        .desc("Total memory footprint at cache line granularity since "
              "simulation begin")
        .flags(nozero | nonan);
    fpPage.name(name() + ".page")
        .desc("Memory footprint at page granularity")
        .flags(nozero | nonan);
    fpPageTotal.name(name() + ".page_total")
        .desc("Total memory footprint at page granularity since simulation "
              "begin")
        .flags(nozero | nonan);
    // clang-format on

    registerResetCallback(
        new MakeCallback<MemFootprintProbe, &MemFootprintProbe::statReset>(
            this));
}

void
MemFootprintProbe::insertAddr(Addr addr, AddrSet *set, uint64_t limit)
{
    set->insert(addr);
    assert(set->size() <= limit);
}

void
MemFootprintProbe::handleRequest(const ProbePoints::PacketInfo &pi)
{
    if (!pi.cmd.isRequest() || !system->isMemAddr(pi.addr))
        return;

    const Addr cl_addr = (pi.addr >> cacheLineSizeLg2) << cacheLineSizeLg2;
    const Addr page_addr = (pi.addr >> pageSizeLg2) << pageSizeLg2;
    insertAddr(cl_addr, &cacheLines, totalCacheLinesInMem);
    insertAddr(cl_addr, &cacheLinesAll, totalCacheLinesInMem);
    insertAddr(page_addr, &pages, totalPagesInMem);
    insertAddr(page_addr, &pagesAll, totalPagesInMem);

    assert(cacheLines.size() <= cacheLinesAll.size());
    assert(pages.size() <= pagesAll.size());

    fpCacheLine = cacheLines.size() << cacheLineSizeLg2;
    fpCacheLineTotal = cacheLinesAll.size() << cacheLineSizeLg2;
    fpPage = pages.size() << pageSizeLg2;
    fpPageTotal = pagesAll.size() << pageSizeLg2;
}

void
MemFootprintProbe::statReset()
{
    cacheLines.clear();
    pages.clear();
}

MemFootprintProbe *
MemFootprintProbeParams::create()
{
    return new MemFootprintProbe(this);
}