base.cc revision 12629:c17d4dc2379e 
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),
65      warmupBound((p->warmup_percentage/100.0) * (p->size / p->block_size)),
66      warmedUp(false), numBlocks(p->size / p->block_size),
67      dataBlks(new uint8_t[p->size]) // Allocate data storage in one big chunk
68{
69}
70
71void
72BaseTags::setCache(BaseCache *_cache)
73{
74    assert(!cache);
75    cache = _cache;
76}
77
78void
79BaseTags::regStats()
80{
81    ClockedObject::regStats();
82
83    using namespace Stats;
84
85    replacements
86        .init(maxThreadsPerCPU)
87        .name(name() + ".replacements")
88        .desc("number of replacements")
89        .flags(total)
90        ;
91
92    tagsInUse
93        .name(name() + ".tagsinuse")
94        .desc("Cycle average of tags in use")
95        ;
96
97    totalRefs
98        .name(name() + ".total_refs")
99        .desc("Total number of references to valid blocks.")
100        ;
101
102    sampledRefs
103        .name(name() + ".sampled_refs")
104        .desc("Sample count of references to valid blocks.")
105        ;
106
107    avgRefs
108        .name(name() + ".avg_refs")
109        .desc("Average number of references to valid blocks.")
110        ;
111
112    avgRefs = totalRefs/sampledRefs;
113
114    warmupCycle
115        .name(name() + ".warmup_cycle")
116        .desc("Cycle when the warmup percentage was hit.")
117        ;
118
119    occupancies
120        .init(cache->system->maxMasters())
121        .name(name() + ".occ_blocks")
122        .desc("Average occupied blocks per requestor")
123        .flags(nozero | nonan)
124        ;
125    for (int i = 0; i < cache->system->maxMasters(); i++) {
126        occupancies.subname(i, cache->system->getMasterName(i));
127    }
128
129    avgOccs
130        .name(name() + ".occ_percent")
131        .desc("Average percentage of cache occupancy")
132        .flags(nozero | total)
133        ;
134    for (int i = 0; i < cache->system->maxMasters(); i++) {
135        avgOccs.subname(i, cache->system->getMasterName(i));
136    }
137
138    avgOccs = occupancies / Stats::constant(numBlocks);
139
140    occupanciesTaskId
141        .init(ContextSwitchTaskId::NumTaskId)
142        .name(name() + ".occ_task_id_blocks")
143        .desc("Occupied blocks per task id")
144        .flags(nozero | nonan)
145        ;
146
147    ageTaskId
148        .init(ContextSwitchTaskId::NumTaskId, 5)
149        .name(name() + ".age_task_id_blocks")
150        .desc("Occupied blocks per task id")
151        .flags(nozero | nonan)
152        ;
153
154    percentOccsTaskId
155        .name(name() + ".occ_task_id_percent")
156        .desc("Percentage of cache occupancy per task id")
157        .flags(nozero)
158        ;
159
160    percentOccsTaskId = occupanciesTaskId / Stats::constant(numBlocks);
161
162    tagAccesses
163        .name(name() + ".tag_accesses")
164        .desc("Number of tag accesses")
165        ;
166
167    dataAccesses
168        .name(name() + ".data_accesses")
169        .desc("Number of data accesses")
170        ;
171
172    registerDumpCallback(new BaseTagsDumpCallback(this));
173    registerExitCallback(new BaseTagsCallback(this));
174}
175