base.cc revision 12513:4dfc54394b5a 
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
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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),
65      warmupBound((p->warmup_percentage/100.0) * (p->size / p->block_size)),
66      warmedUp(false), numBlocks(0)
67{
68}
69
70void
71BaseTags::setCache(BaseCache *_cache)
72{
73    assert(!cache);
74    cache = _cache;
75}
76
77void
78BaseTags::regStats()
79{
80    ClockedObject::regStats();
81
82    using namespace Stats;
83
84    replacements
85        .init(maxThreadsPerCPU)
86        .name(name() + ".replacements")
87        .desc("number of replacements")
88        .flags(total)
89        ;
90
91    tagsInUse
92        .name(name() + ".tagsinuse")
93        .desc("Cycle average of tags in use")
94        ;
95
96    totalRefs
97        .name(name() + ".total_refs")
98        .desc("Total number of references to valid blocks.")
99        ;
100
101    sampledRefs
102        .name(name() + ".sampled_refs")
103        .desc("Sample count of references to valid blocks.")
104        ;
105
106    avgRefs
107        .name(name() + ".avg_refs")
108        .desc("Average number of references to valid blocks.")
109        ;
110
111    avgRefs = totalRefs/sampledRefs;
112
113    warmupCycle
114        .name(name() + ".warmup_cycle")
115        .desc("Cycle when the warmup percentage was hit.")
116        ;
117
118    occupancies
119        .init(cache->system->maxMasters())
120        .name(name() + ".occ_blocks")
121        .desc("Average occupied blocks per requestor")
122        .flags(nozero | nonan)
123        ;
124    for (int i = 0; i < cache->system->maxMasters(); i++) {
125        occupancies.subname(i, cache->system->getMasterName(i));
126    }
127
128    avgOccs
129        .name(name() + ".occ_percent")
130        .desc("Average percentage of cache occupancy")
131        .flags(nozero | total)
132        ;
133    for (int i = 0; i < cache->system->maxMasters(); i++) {
134        avgOccs.subname(i, cache->system->getMasterName(i));
135    }
136
137    avgOccs = occupancies / Stats::constant(numBlocks);
138
139    occupanciesTaskId
140        .init(ContextSwitchTaskId::NumTaskId)
141        .name(name() + ".occ_task_id_blocks")
142        .desc("Occupied blocks per task id")
143        .flags(nozero | nonan)
144        ;
145
146    ageTaskId
147        .init(ContextSwitchTaskId::NumTaskId, 5)
148        .name(name() + ".age_task_id_blocks")
149        .desc("Occupied blocks per task id")
150        .flags(nozero | nonan)
151        ;
152
153    percentOccsTaskId
154        .name(name() + ".occ_task_id_percent")
155        .desc("Percentage of cache occupancy per task id")
156        .flags(nozero)
157        ;
158
159    percentOccsTaskId = occupanciesTaskId / Stats::constant(numBlocks);
160
161    tagAccesses
162        .name(name() + ".tag_accesses")
163        .desc("Number of tag accesses")
164        ;
165
166    dataAccesses
167        .name(name() + ".data_accesses")
168        .desc("Number of data accesses")
169        ;
170
171    registerDumpCallback(new BaseTagsDumpCallback(this));
172    registerExitCallback(new BaseTagsCallback(this));
173}
174