base.cc revision 11893:3033b3e6a32a 
1/*
2 * Copyright (c) 2013,2016 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 * Copyright (c) 2003-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Erik Hallnor
41 *          Ron Dreslinski
42 */
43
44/**
45 * @file
46 * Definitions of BaseTags.
47 */
48
49#include "mem/cache/tags/base.hh"
50
51#include "cpu/smt.hh" //maxThreadsPerCPU
52#include "mem/cache/base.hh"
53#include "sim/sim_exit.hh"
54
55using namespace std;
56
57BaseTags::BaseTags(const Params *p)
58    : ClockedObject(p), blkSize(p->block_size), blkMask(blkSize - 1),
59      size(p->size),
60      lookupLatency(p->tag_latency),
61      accessLatency(p->sequential_access ?
62                    p->tag_latency + p->data_latency :
63                    std::max(p->tag_latency, p->data_latency)),
64      cache(nullptr), warmupBound(0),
65      warmedUp(false), numBlocks(0)
66{
67}
68
69void
70BaseTags::setCache(BaseCache *_cache)
71{
72    assert(!cache);
73    cache = _cache;
74}
75
76void
77BaseTags::regStats()
78{
79    ClockedObject::regStats();
80
81    using namespace Stats;
82
83    replacements
84        .init(maxThreadsPerCPU)
85        .name(name() + ".replacements")
86        .desc("number of replacements")
87        .flags(total)
88        ;
89
90    tagsInUse
91        .name(name() + ".tagsinuse")
92        .desc("Cycle average of tags in use")
93        ;
94
95    totalRefs
96        .name(name() + ".total_refs")
97        .desc("Total number of references to valid blocks.")
98        ;
99
100    sampledRefs
101        .name(name() + ".sampled_refs")
102        .desc("Sample count of references to valid blocks.")
103        ;
104
105    avgRefs
106        .name(name() + ".avg_refs")
107        .desc("Average number of references to valid blocks.")
108        ;
109
110    avgRefs = totalRefs/sampledRefs;
111
112    warmupCycle
113        .name(name() + ".warmup_cycle")
114        .desc("Cycle when the warmup percentage was hit.")
115        ;
116
117    occupancies
118        .init(cache->system->maxMasters())
119        .name(name() + ".occ_blocks")
120        .desc("Average occupied blocks per requestor")
121        .flags(nozero | nonan)
122        ;
123    for (int i = 0; i < cache->system->maxMasters(); i++) {
124        occupancies.subname(i, cache->system->getMasterName(i));
125    }
126
127    avgOccs
128        .name(name() + ".occ_percent")
129        .desc("Average percentage of cache occupancy")
130        .flags(nozero | total)
131        ;
132    for (int i = 0; i < cache->system->maxMasters(); i++) {
133        avgOccs.subname(i, cache->system->getMasterName(i));
134    }
135
136    avgOccs = occupancies / Stats::constant(numBlocks);
137
138    occupanciesTaskId
139        .init(ContextSwitchTaskId::NumTaskId)
140        .name(name() + ".occ_task_id_blocks")
141        .desc("Occupied blocks per task id")
142        .flags(nozero | nonan)
143        ;
144
145    ageTaskId
146        .init(ContextSwitchTaskId::NumTaskId, 5)
147        .name(name() + ".age_task_id_blocks")
148        .desc("Occupied blocks per task id")
149        .flags(nozero | nonan)
150        ;
151
152    percentOccsTaskId
153        .name(name() + ".occ_task_id_percent")
154        .desc("Percentage of cache occupancy per task id")
155        .flags(nozero)
156        ;
157
158    percentOccsTaskId = occupanciesTaskId / Stats::constant(numBlocks);
159
160    tagAccesses
161        .name(name() + ".tag_accesses")
162        .desc("Number of tag accesses")
163        ;
164
165    dataAccesses
166        .name(name() + ".data_accesses")
167        .desc("Number of data accesses")
168        ;
169
170    registerDumpCallback(new BaseTagsDumpCallback(this));
171    registerExitCallback(new BaseTagsCallback(this));
172}
173