base.cc revision 11722:f15f02d8c79e 
1/*
2 * Copyright (c) 2013 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), size(p->size),
59      lookupLatency(p->tag_latency),
60      accessLatency(p->sequential_access ?
61                    p->tag_latency + p->data_latency :
62                    std::max(p->tag_latency, p->data_latency)),
63      cache(nullptr), warmupBound(0),
64      warmedUp(false), numBlocks(0)
65{
66}
67
68void
69BaseTags::setCache(BaseCache *_cache)
70{
71    assert(!cache);
72    cache = _cache;
73}
74
75void
76BaseTags::regStats()
77{
78    ClockedObject::regStats();
79
80    using namespace Stats;
81
82    replacements
83        .init(maxThreadsPerCPU)
84        .name(name() + ".replacements")
85        .desc("number of replacements")
86        .flags(total)
87        ;
88
89    tagsInUse
90        .name(name() + ".tagsinuse")
91        .desc("Cycle average of tags in use")
92        ;
93
94    totalRefs
95        .name(name() + ".total_refs")
96        .desc("Total number of references to valid blocks.")
97        ;
98
99    sampledRefs
100        .name(name() + ".sampled_refs")
101        .desc("Sample count of references to valid blocks.")
102        ;
103
104    avgRefs
105        .name(name() + ".avg_refs")
106        .desc("Average number of references to valid blocks.")
107        ;
108
109    avgRefs = totalRefs/sampledRefs;
110
111    warmupCycle
112        .name(name() + ".warmup_cycle")
113        .desc("Cycle when the warmup percentage was hit.")
114        ;
115
116    occupancies
117        .init(cache->system->maxMasters())
118        .name(name() + ".occ_blocks")
119        .desc("Average occupied blocks per requestor")
120        .flags(nozero | nonan)
121        ;
122    for (int i = 0; i < cache->system->maxMasters(); i++) {
123        occupancies.subname(i, cache->system->getMasterName(i));
124    }
125
126    avgOccs
127        .name(name() + ".occ_percent")
128        .desc("Average percentage of cache occupancy")
129        .flags(nozero | total)
130        ;
131    for (int i = 0; i < cache->system->maxMasters(); i++) {
132        avgOccs.subname(i, cache->system->getMasterName(i));
133    }
134
135    avgOccs = occupancies / Stats::constant(numBlocks);
136
137    occupanciesTaskId
138        .init(ContextSwitchTaskId::NumTaskId)
139        .name(name() + ".occ_task_id_blocks")
140        .desc("Occupied blocks per task id")
141        .flags(nozero | nonan)
142        ;
143
144    ageTaskId
145        .init(ContextSwitchTaskId::NumTaskId, 5)
146        .name(name() + ".age_task_id_blocks")
147        .desc("Occupied blocks per task id")
148        .flags(nozero | nonan)
149        ;
150
151    percentOccsTaskId
152        .name(name() + ".occ_task_id_percent")
153        .desc("Percentage of cache occupancy per task id")
154        .flags(nozero)
155        ;
156
157    percentOccsTaskId = occupanciesTaskId / Stats::constant(numBlocks);
158
159    tagAccesses
160        .name(name() + ".tag_accesses")
161        .desc("Number of tag accesses")
162        ;
163
164    dataAccesses
165        .name(name() + ".data_accesses")
166        .desc("Number of data accesses")
167        ;
168
169    registerDumpCallback(new BaseTagsDumpCallback(this));
170    registerExitCallback(new BaseTagsCallback(this));
171}
172